CZECHOSLOVAK ACADEMY OF SCIENCES

CZECHOSLOVAK ACADEMY OF SCIENCES

Scientific Editor: Prof. Dr. Bohumlr Rosickj, DrSc.

Foreign Language Editors: F. G. A.M. Smit, A.M. Wright

Graphic Design by Vladimlr Kalenskj

PROCEEDINGS OF THE 3rd INTERNATIONAL

CONGRESS OF ACAROLOGY

held in Prague August 31 - September 6, 1971

Edited by

Milan Daniel and Bohumir Rosickj

Springer-Science+Business Media, B.V. 1973

Additional material to this book can be downloaded from http://extras.springer.com

ISBN 978-94-010-2711-3 ISBN 978-94-010-2709-0 (eBook) DOI 10.1007/978-94-010-2709-0

© Springer Science+ Business Media Dordrecht 1973

Originally published by ACADEMIA, Publishing House of the Czechoslovak Academy ofSciencesl973 Softcover reprint of the hardcover 1st edition 1973

CONTENTS

Preface Committee of the International Congress of Acarology Executive Committee of the International Congress of Acarology Officers of the Congress Organizing Committee in the Host Country Honorary Members of the International Congress of Acarology Opening Address by Academician J. Koiefnfk, President of

the Czechoslovak Academy of Sciences Opening Address by Academician B. Rosicky Introductory Paper

B. Rosicky: Acarology and Its Practical Importance Sectional Papers

Symposium on Scanning Electron Microscopy in Acarology Section I • Soil Mites Section Section

II - Marine and Freshwater Mites I I I • Plant Mites

Section IV - Taxonomy of Hiaher Catepries, Phyloaeny and Zooaeoaraphy

Section V - Mites of S110red Products Section VI - Parasitic Mites, Faunistics and Tuonomy

(excluding ticks) Section VII - Ticks, Faunistics and Tuonomy Section VIII • Mites and Ticks of Medical aod Veterinary

Importance Section IX A· Mites and Ticks in N8lllral Foci of

Tick-home Encephalitis Section IX B • Mites and Ticks in Natural Foci of Other

Diseases than TBE Section X- Bioloaical, Chemical aod Physical Control Section XI • Physiology, Genetics and Behaviour Section XU - Ecology of Mites and Ticks

Closing Address by B. Rosic:ky The Rules of the International Congress of Acarology List of Participants Index of Latin Names

5

13 14 14 15 16 16

17 19

21

33 57

139 181

255 347

391 449

487

561

601 637 701 753 809 812 815 821

Symposium on Scanning Electron Microscopy in Acarology

Axtell, R.C., Foelix, R.F., Coons, L.B. and Roshdy, M.A.: Sensory receptors in ticks and mites 35

Griffiths, D.A.: Specimen preparation for, and the advances of, examining acarine morphology 41

with the scanning electron microscope

Kalata, D.R., Norstog, K.J ., Rohde, C.J .: Ultrastructure of the· egg envelopes of a uropodid mite 47

Sixl, W., Dengg, E., Waltinger, H.: Scanning electron microscope investigations on ticks, with

special regards to the sensillae, Haller's organ and the apical palpal segment 53

Woolley, T.A.: Scanning electron microscopy of oribatid mites 55

Section 1

Soil Mites

Aoki, Jun-ichi: Soil mites (Oribatids) climbing trees 59

Bernini, F.: Ultrastructural observations on the alimentary canal in Oribatidae (Acari) 67

Bohnsack, K.K.: Distribution of oribatids near Barrow, Alaska 71

Bulanova-Zakhvatkina, E.M.: The systematics and geographical distribution of mites of the su-

perfamily Belboidea Dub., 1958 (Acariformes; Oribatei) 75

Harding, D.J .L.: The phenology of Platynothrus peltifer (C.L.K.) 79

Hill, J .R.: An ordination of oribatid mite fauna under differing forest covers 85

Krivolutsky, D.A.: The evolutionary ecology trends and tempo of evolution in Palearctic Ori-

batei 91

Kurcheva, G.F .: The oribatid mite fauna of oak forests of the Transcarpathians (East Carpa-

thians) and other areas of the European part of the USSR 95

Mlrphy, P.W., Balla, A.N.: The bionomics of Humerobates rostrolamellatus Grandjean (Crypto-

stigmata-ceratozetidae) on fruit trees 97

Raj ski, A.: Autoecological-zoogeographical analysis of moss mites (Acari, Oribatei) based on

the fauna in the environs of Poznan 105

Shereef, G.M.: Biological and ecological observations on oribatid mites 109

Sitnikova, L.G.: The postembryonic development of Pelopidae 115

Tadros, M.S.: The occurrence of Oribatula tadrosi (Popp), (Acarina, Oribatulidae) on pear trees

in the U.A.R. 119

Vant';k, J .: The cenosis of Oribatid mites as an aid in bio-indication (Acarina, Oribatoidea) 125

Wallwork, J .A.: Some aspects of the energetics of soil mites 129

Webb, N.R., Elmes, G.W.: The structure of an adult population of Steganacarus magnus (Nic.)

(Cryptostigmata) 135

Section 2

Morine ond Freshwater Mites

Bader, C.: The dorsal shields of the Thyasidae 141

Bazan-Strzelecka, H.: The groups of water mites (Hydrachnellae) in ponds after peat-digging 147

Conroy, J .C.: A new method for trapping water-mites in the benthos of a lake 151

6

Gledhill, T.: The water-mites (Hydtachnellae, Acari) of a stony stream 159

Petrova, A.: On Halacarid migration into freshwaters 169

Puncochar, P.: On dte occurrence of water mites (Hydrachnellae) in dte submerged vegetation of a catp pond 173

Sokolov, l.I., Yankovskaya, A.I.: Peculiarities of the fauna of Hydracarina from Lake Baikal 177

Section 3

Plant Mites

Atanasov, N.: Physiological functions of plants as affected by damage caused by Tetranychus

at/anticus McGregor

Attiah, H.H., Soliman, A.A. and Wahba, M.L.: On the biology of Brevipalpus califomicus Banks

Attiah, H.H., Wahba, M.L.: Phosphorus compounds as a cause of an increase in numbers of the

flat mite Carmona, M.M.: Notes on the bionomics of Calepitrimerus vitis (Nal.) (Acarina: Eriophyidae)

ChannaBasavanna, G.P.: The present status of our knowledge of Indian plant feeding mites

Cranham, J .E.: The effect of temperature on hatching of the winter eggs of fruit tree red spider

mite, Panonychus ulmi (Koch)

~hrowski, Z.T.: Feeding response of the two-spotted spider mite to some plant components

D!izgiinez, Z.: Some problems in the control of cotton mites in Turkey

Hatzinikolis, E.N .: A contribution to the study of A ceria oleae (Nalepa, 1900) {Acarina: Erio­

phyidae) Kropczynska-Linkiewicz, D.: Studies on the feeding of four species of phytoseiid mites (Aca.:

rina: Phytoseiidae) Livshits, liZ., Mitrofanov, V .1.: A contribution to the faune and biology of Tetranychid mites

of dte Crimea (Acariformes, Tetranychoidea)

Natcheff, P.D.: Studies on Eriophyid mites in Bulgaria Saba, F.: Population dynamics of some tetranychids in subtropical Florida

Sepasgozarian, H.: Mites and their economical importance in Iran

Silvere, A.P.A.: Origin and evolution of gall mites (Eriophyoidea) in the light of their internal

anatomy Soliman, A.A., Attiah, H.A., Wahba, M.L.: Preliminary biological studies on Tetranychus neo­

calidonicus Marc Andre

Section 4

Taxonomy of Higher Categories, Phylogeny and Zoogeography

Athias-Henriot, C.: Idiosomal sigillotaxy of gamasids, preliminary observations towards the

183 187

193

197

201

205 211 217

221

225

229 233 237 241

247

251

knowledge of the morphology of these Arachnida 257

Bregetova, N.G.: Some considerations on the system and phylogeny of the Gamasid mites 263

Coineau, Y .: Ontophylogenetic considerations on the chaetotaxy of Caeculidae (Acari-Prostig-

mata) 269

Evans, G.O.: Some aspects of the morphology of the gnathosoma of Heterozercon (Acari: Me-

sostigmata) 343

Hammen van der, L.: Classification and phylogeny of mites 275

Hansell, R.I.C., Chant, D.A.: An analysis of the classi!cal taxonomic me'thod with particular

reference to the family Phytoseiidae (Acarina: Mesostigmata) 283

Hirschmann, 'I'.: Gangsystematikof lhe Parasitiformes and dte family Uropodidae Berlese 287

7

Lindquist, E.E.: Observations on the generic classification of tarsonemid mites (Prostigmata). Characters of the gnathosoma 293

Mitrofanov, V.I.: On the taxonomy of the Bryobiidae (Acariformes, Tetranychoidea) 297 Newell, I.M.: Solenidial transposition in Pimeliaphilus (Acari, Pterygosomatidae) and its poten-

tial systematic significance 299 Piffl, E.: Imprimatur for taxonomical publications 345 Trave, J .: The specific stability and the chaetotactic variations in Mucronothrus nasalis Willm.

(Oribatei) 30 3 Vercammen-Grandjean, P.H.: Preliminary note to a tentative nepophylogeny of trontbiculids 311 Vercammen-Grandjean, P.H.: Study of the "Erythraeidae, R.O.M. no. 8" of Ewing, 1937 329 Vercammen-Grandjean, P.H.: Of techniques and ortho-iconography 321 Woolley, T.A.: Taxonomy of oribatid mites -retrospect and prospect 337

Section 5

Mites of Stored Products

Attiah, Hassan H.: Chelachecaropsis bakeri, a new genus and species associated with stored food mites in Egypt (Acarina, Cheyletidae) 349

Boczek, J., Legat, T.: Demographic parameters of Tyrophagus putrescentiae (Schr.) reared on various foods 353

Chmielewski, W.: A study on the influence of some ecological factors on the hypopus formation of stored product mites 3 57

Czajkowska, B.: The influence of some active substances of medicinal herbs on stored product mites (Acaroidea) 365

Kadzhaya, G.Sh.: The family Acaridae of the Caucasian fauna 371 St~pien, Z.A., Goszcynski, W ., Boczek, J .: The energy budget of Tyrophagus putrescentiae

(Schr.) (Acaridae) 373 Tareev, V. N.: Fauna of acarid mites of the Far East 379 Volgin, V .1.: The hypopus and its main types 381 :ld';lrkova, E.: Orientation of Tyrophagus putrescentiae (Schrank) towards olfactory stimuli 385

Section 6

Parasitic Mites, Faunistics and Taxonomy (excluding ticks)

Daniel, M.: Chiggers in the high altitude region of the East Hindu-Kush Dubinina, H.V.: Peculiarities of the development of morphological structure in genera of the

subfamily Listrophorinae Edler, A.: Ectoparasitic mites (Gamasoidea) on small mammals in northernmost Sweden Fain, A.: Classification and geographical distribution of Listrophoroidea Feider, z., Mironescu, 1.: A particular way of piercing the nasal mucous membrane used by

mites of the family Rhinonyssidae Trouessart, 1895 Gadzhiev, A.T.: Gamasid mites (Gamasoidea; Parasitiformes) of the Caucasus Hushcha, G.I.: Present situation in the studies of chigger mites in the USSR Kobulej, T ., Czer, S.: Eradication of myobiid mites infesting laboratory mice

Kramarova, L., Mrciak, M.: Nest mites of small mammals in the Western Carpathians Loomis, R.B.: Chiggers (Family Trombiculidae) of the North American Deserts Mcciak, M.: To the zoogeography of some mite species (Gamasoidea) parasitizing small mammals

in Europe 9Icherbak, G.I.: The distribution of gamasoid mites parasitizing the house mouse (Mus musculus)

in the Ukraine

8

393

397 403 411

415 417 421 425

427 435

441

445

Section 7

Ticks, Faunistics cmd Taxonomy

Babenko, L. V .: On the ecology of Ixodes ricinus L. nymphs (Ixodidae) 451 Balashov, Yu.S.: Experimental interspecific hybridization of ticks of genus Ornithodoros 459 Filippova, N.A.: Some distributional peculiarities of species belonging to the Ixodes persulcfJ·

tus group 463 Haarllllv, N .: The introduction into Denmark of the kennel tick (RbipicepbfJlas s1111guineus)

(Latr. 1806) with remarks on its reactions to different humidities 467 Kaiser, M.N., Hoogstraal, H., Watson, G. E.: Ticks (Ixodoidea) on migrating birds in Cyprus,

fall 1967 and spring 1968, and epidemiological considerations 473 Nosek, J.: Some characteristic features of the life history, ecology and behaviour of the ticks

HfJemfJpbysfJlis inermis, H. concinnfJ and H. punctfJtfJ 479 Uspenskaya, I.G.: Biology of HfJemfJpbystJlis (AllocerfJefJ) inermis in Moldavia 483

Section 8

Mites cmd Tich of Modieal and Vetorincay lmportcmce

Belozerov, V.N.: Diapause phenomena in ticks (Ixodoidea) and their regulation 489 Daniel, M., Honzakova, E., Cerny, V., Dusbabek, F.: Hibernation of the tick Ixodes ricirlus in

the light of continuously measured microclimate elements 493 Desch, E., Nutting, W.B.: Demodicids (Trombidiformes: Demodicidae) of medical and veteri-

nary importance 499 Hoogstraal, H.: Emerging patterns of tick-virus relationships 507 Hoogstraal, H.: Biological patterns in dte Afghanistan tick fauna 511 Gritsenko, E.F.: The biology and ecology ofthe quill mite Syringopbilus bipectinfJtas Heller,

1880 515 Lebel, R.R., Nutting, W.B.: Population dyn-ics of a parasitic mite Demodex cfJprfJe (Trombi-

diformes: Demodicidae) 517 ~rka, V., Palicka, P.: Epidemiological analysis of the incidence of scabies in one of dte

districts in Czechoslovakia 523 Moorhouse, D. E.: On the morphogenesis of the attachment cement of some isodid ticks 527 Nutting, W.B.: Adaptations in demodicids (Trombidiformes: Demodicidae) for utilization of the

mammalian skin complex 531 Nykolsky, S., Tchablin, 0.: A susceptibility of animals to Psoroptes invasion 537 Poiyakov, O.K.: Control of acariases and piroplasmoses of farm animals in the USSR 539 PUvora, M., Sevcova, M.: On the diagnostics of human scabies 541 Rosicky, B., Cerny, V., Hejny, S.: Tick distribution in inundated and non-inundated biotopes 545 Sais, J .: The histological identification of AcfJf'infJ in skin biopsies 547 Spieksma,F.Th.M.: Ecological distribution of house-dust mites in Europe 551 Wharton, G.W.: Spatial relations of house dust mites 557

Section 9 A

Mites cmd Ticks in Natural Foci of Tick-bome Encephalitis

ASmera, J ., Heinz, F.: Tick-borne encephalitis as a hazard factor in working environments 563 Kolman, J.M.: Infectivity of Ixodes ricinus L. ticks in the mixed natural focus of tick-borne en•

cephalitis (TBE) and Uukuniemi (UK) virus 569

9

Korenberg, E.I.: Methodological principles of mapping the occurrence of Ixodid ticks 575 Kozuch, 0., Nosek, J ., Ernek, E., Labuda, M., Chmela, J .: Ticks in relation to maintenance

hosts of arboviruses in Central Europe 579 Kucheruk, V.V.: Causes and dynamics of contacts between rural inhabitants and Ixodes persul·

catus in natural foci of tick-borne encephalitis 583 Nosek, J ., BlaskoviC, D.: Ticks as vectors of tick-borne encephalitis (TBE) virus in Europe 589 Nosek, J ., Kozuch, 0., Labuda, M.: Dermacentor marginatus and D. reticula/us ticks, possible

vectors of tick-borne encephalitis virus in Central Europe 593 Sixl, W.: The occurrence of the rick Haemaphysalis concinna Koch in relation of rick·borne en·

cephalitis 597

Section 9 B

Mites ond Ticks in Natural Foci of Other Diseases than TBE

Karelina, A.F., Myasnikov, Yu.A., Panina, T.V.: Burrow tick Ixodes trianguliceps in natural foci of haemonbaRic fever with renal syndrome in broad-leaved forests of Eastern Europe 603

Levy, V.: Distribution and seasonal activity in the preimago phases of the Ixodidae ticks in a focus of haemorrhagic fever (Crimean type) 609

Popov, G.V., Levy, V., Vasilenko, S.M., Chumakov, M.P.: Application of fluorescent antibody method (FAM) in rhe isolation of Crimean haemorrhagic fever virus from ricks, the vectors of the disease 61 5

Ravdonikas, 0. V., Chumakov, M.P., Ivanov, D. I., Korsh, P. V., Myasnikov, Yu.A.: Potentiali-ties of accumulation of Omsk haemorrhagic fever virus in the population of Ixodid ricks of

• the natural focus durinjl the epizootic season 619 Rehacek, J ., Brezina, R., ZupanCicova, M., Kovacova, E.: Relationship between ticks and

rickettsiae of the Rocky Mountain Spotted Fever group (RMSF) isolated in Slovakia 627 Rehacek, J ., Zupanl.'icova, M., Kovacova, E.: Attempts to use half-engorged ticks for the titra-

tion of rickettsiae 631

Sect ion 10

Biological, Chemical and Physicai.Control

Attiah, H.H., Wahba, M.L., and Koditah, S.M.: Chlorobenzilate, an acaricide of wide s.pectrum against citrus mires 639

Chhabra, K.S.: Influence of certain phytocides and antibiotics on the reproduction and develop-ment of Tetranychus .mites 645

Cranham, J .E.: Resistance to acaricides in fruit tree red spider mite, Panonychus ul•i (Koch), in south-east England 649

Gerson, U.: The mites associated with armored scale insects 653 Gorchakovskaya, N.N. and Korodcov, Yu.S.: Many-year reaction of the population of Ixodes persul-

catus P. Sch. ticks to a single introduction of stable residual acaricide into their habitats 655 Heme, D.H.C.: Methodology for assessing resistance in the European red mite 663 Kiefer, M. and Cyprich, D.: Susceptibility of Ixodes ricinus L. to DDT and other acaricides in

Westetn Slovakia 669 Merka, V., Rupes, V., Vobrazkova, E., PHvora, M.: Susceptibility of Sancassania phyllognathi

to some insecticide aerosols 675 Minar, J., Cerny, V., P'Hvora, M. and Kalinec, A.: Effect of trichlorphon (DTHP)-based prepara-

tions on ticks and mites 679 Novak, D.: Preliminary laboratory tests with tick repellents 685

10

Palmer, B.H., McCarrhy, J .F., Kozlik, A., and Harrison, I.R.: A new chemical group of cattle acaricides 687

Roulston, W.J .: Prospects for chemical control of Boophilus microplus in Australia 693 \lbarton, R.H., Utech, K.B.W. and Sutherst, R.W.: Tick resistant cattle for the control of Boophi-

lus microplus 697

Sect ion 11

Physiology, Genetics and Behaviour

Akimov, I.A.: On the morphological and physiological characteristics of the alimentary canal of

the bulb mite Rhizoglypbus ecbinopus (Fumouze et Rabin) 703

Belozerov, V.N., Tymopheev, V.A.: An electron-microscope investigation of the midgut epithe-lium of the adult female of Dermacentor marginatus Sulz. 707

Chinery, W.A.: The salivary glands of Argas persicus (Oken, 1818) 711

Devine, T.L., Wharton, G. W.: Kinetics of water exchange between a mite, Laelaps echidnina, and the surrounding air 717

Feldman-Muhsam, B.: Copulation and spermatophore formation in soft and hard ticks 719

Holman, L.J .: Continuous insemination in Butrombicula splendens (Acarina: Trombiculidae) 723 Knlille, W., Devine, T.L.: Water vapor sorption from the atmosphere: Evidence for active and

passive components in larvae of Dermacentor variabilis (Say) 727

Musatov, V.A.: Feeding of ticks on sensibilized animals 729

Oliver, J .H., Jr., Brinton, L.P.: Sperm maturation in ticks: an example of capacitation in inverte-

brates? 733 Rodriguez, J .G.: Feeding behavior and nutritional requirements of some acari 739 Tatchell, R.J ., Binnington, K.C.: An active constituent of the saliva of the cattle-tick, Boopbi·

Ius microplus 745

Treat, A.E.: Blattisocius tarsalis: behavior in association with the moth Bpizeuxis aemula 749

Section 12

Ecology of Mites and Ticks

Abbatiello, M.J .: A study of the life cycle of Pseudobryobia drummondi !Ewing) (Acarina: Te-tranychidae) 755

Cerny, V: Parasite-host relationships in feather mites 761

Daniel, M.: Interrelationships of mesostigmatic mites in the nests of Clethrionomys glareolus 765

Dusbabek, F.: The acarinia zone of bats under conditions of Central Europe 771

Filipponi, A.: Influence of temperature on population increase of four dung-living macrochelid

mites within optimum range 775

Kethley, J .: Population regulation in quill mites (Acarina: Syringophilidae) 781

O'Donnell, T .G.: Density and host relations of Ixodes trianguliceps Bir. in woodland and grass-

land areas 783 Newell, I.M.: The protonymph of Pimeliaphilus (Pterygosomatidae) and its significance relative

to the calyptostases in the Parasitengona 789 Sutherst, R. W., Wharton, R.H.: Preliminary considerations of a population model for Boophilus

microplus in Australia 797 Sweatman, G.K., Tomey G. and Katul G.: Electrograms of feeding ticks recorded continuously by

telemetry 807 Wilkinson, P.R.: Termination of diapause in laboratory-reared Dermacentor andersoni adults 803

11

PREFACE

The Third International Congress of Acarology (Prague, August 31 -September 6, 1971) was held under the auspices of the Presidium of the Czechoslovak Academy of Sciences which had accepted the ·proposal of the Committ-ee of the International Congress of Acarology to organize this meeting of acarologists in Czechoslovakia and subsequently requested the Institute of Parasitology of the C:iiechoslovak Aca­demy of Sciences to set about this task. The members of the Organizing Committee of the Congress express their gratitude to the Presidium of the Czechoslovak Aca­demy of Sciences, especially to its President Academician J. Kofesnlk who per­sonally attended the Congress.

The Coogress sessioos were attended by more than 200 specialists from 32 countries and by World Health Organizatioo representatives. In twelve sectioos and one symposium 153 papers were read, all of which are included in ·this volume. The papers are published in extenso, with the exception of a few communications presented by authors who decided to publish them in professional journals. In such cases abstracts of the papers are included in the volume for the sake of complete­ness.

The sessions were held in congress languages and simultaneous translation was provided into English and Russian. All papers in this volume are printed in English and this necessitated a language revision of the major part of the manuscript. Thanks to the kind efforts of Mr. F .G.A.M. Smit and Mrs. A.M. Wright of the British Museum (Natural History), the Zoological Museum, Tring, this arduous task was accomplished at short notice. Invaluable assistance in the translation of some papers and in the preparation of manuscripts for the press was rendered by Mrs. E. Belyjov.l, Mrs. M. Daskova and Mrs. J. WaKnerova of the Institute of Parasitology, Czechoslovak Aca­demy of Sciences. Also invaluable were the efforts exerted by Drs V. t.emy, F. Dus­b&bek and E. Honz&kova, the staff members of the same Institute, who assisted with the correction of proofs. To all of them the Editors express their deep gratitude. Sincere thanks are also due to the members of ACADEMIA, the Publishing House of the Czechoslovak Academy of Sciences, especially to Dr. M. CHkova and Mr. J .Ku­dmovsq, for their cooperation and understanding enabling this volume to be publish· ed in the shottest possible time.

The Editors

13

(.;;omm ittee of the International Congress of

Acarology

(acting from 1967 to 1971)

N.G. Bregetova, U.S.S.R. G.O. Evans, U.K.

E. Piffl, Austria

G. Mathys, France P.W. Murphy, U.K.

M. van de Vrie, Holland T.A. Woolley, U.S.A.

Executive CommiHee of the International Congress of

Acarology (acting from September 1971)

M. Daniel, Czechoslovakia, Past-President1

F.J. Radovsky, U.S.A., Secretary 2

D.A. Griffiths, U.K., Treasurer2

C. Athias-Henriot, France2

Yu. S. Balashov, U.S.S.R.2

M. Costa, lsrael2

A. Filipponi, ltaly2

H. Hoogstraal, U.S.A. 2

E. Piffl, Austria' M. van de Vrie, Holland'

1 Acting in his place as Past-President at the request of Prof. B. Rosicky 2 Elected September 1971 3 Elected July 1967

14

Officers of tt.e Congress

President

B. Rosicky

Vice-Presiderlls

N.G. Bregetova, U.S.S.R. G.W. Whartoa, U.S.A.

Sectional Cbairlflerr

C. Athias-Henriot, France C. Bader, Switzerlud Yu.S. Balashov, U.s.s.R. J. Boczek, Poland N.G. Breaetova, U.s.s.R. G.O. Evans, U.K. D.A. Griffiths, U.K.

15

C.A. Hall, U.S.A. H. Hooastraal, U.s.A. W. Kaiille, West Berlin V. V. Kucheruk, U.s.s.R. B. Rosicky, Czechoslovakia v .1~ Voisin, u .s.s.R. G.w. Wharton, u.s.A.

Organizing Committee in the Host Country

of the Third International Congress of

Acarology

Chairman

B. Rosicky

Vice-Chairman

M. Daniel

Secretary

K. Samsinak

Committee Members

J. Asmera V. Cerny F. Dusb.l.bek E. Honzakova J. Kolman J. Kramar J. Kratochv:l M. Kunst

M. Mrciak J. Nosek M. Pf:vora J. Rehacek J, Schmid J. Van~k P. Verner

Honorary Members of the lntemational Congress of Acarology

The following distinguished acarologists were elected by the Third International Congress of Acarology as Honoraty Members for life, in recognition of their valuable contributions to

Acarology.

E. Browning, U.K. F. Grandjean, France Taiji Imamura, Japan 1.1. Sokolov, U.S.S.R.

16