G.P. MORETTI The Triennial Symposium of Trichoptera would seem to have become a regular event on the calendar. Initiated by Prof. Malicky at Lunz in Austria in 1974, they continued at Reading in England in 1977 (Convenor: Dr M.I. Crichton), the last, this year, took place in Perugia, Italy (Convenor: Prof. G.P. Moretti) and the next will be hosted by Dr J.C. Morse in Clemson, U.S.A. in 1983. The most outstanding points of the 3rd International Symposium on Trichoptera held at Perugia from July 28 to August 2, 1980 were I) the high number of participants; 2) the extent, scientific interest and coverage of the papers presented and 3) the warmth and immediate contact which drew everyone together from the first moment. Twenty-one nations (Australia, Austria, Belgium, Bulgaria, Canada, Czechoslavakia, Denmark, France, Germany-F.G.R., Germany-G.D.R., Hungary, Iceland, Italy, Mexico, Netherlands, Poland, Spain, Sweden, Switzerland, United Kingdom, United States) were represented by a total of 63 trichopterologists who presented 54 papers and 8 posters during in 8 sessions chaired by M.I. Crichton, H. Malicky, A. Nielsen, O. Flint, L.

Inhalt

1. A report on Gregarines of Trichoptera in the intestines of Salmo farlo L..- 2. Pigments and preservation in caddis larvae and pupae.- 3. Ordo Trichoptera et Homo insapiens.- 4. Observations morphologiques, éthologiques et écologiques sur Hydroptila hirra Mosely (Trichoptera: Hydroptilidae).- 5. Trichoptera from the Baltic Amber.- 6. Observations on the longitudinal distribution of Trichoptera larvae on a stream at Zempoala Mexico, Mexico.- 7. Emergence of Trichoptera from Trout Creek, Colorado, USA.- 8. Further observations on limnephilid life histories, based on the Rothamsted Insect Survey.- 9. Action de la photopériode sur la maturation génitale des femelles de quelques Limnephilidés.- 10. Changes in the Profundal Trichoptera of Lake Winnipeg 192832 to 1969.- 11. Studies of Neotropical caddisflies, XXVII: Anomalopsychidae, a new family of Trichoptera.- 12. Description of Hydropsyche larvae found in the Iberian peninsula.- 13. Predatory exclusion of Apatania zonella (Zett.) by Potamophylax cingulatus (Steph.) (Trichoptera: Limnephilidae) in Iceland.- 14. Distribution and habitat preferences of Icelandic Trichoptera.- 15. Effects of acclimation to temperature on the respiratory rate of some limnephilid larvae.- 16. Caddis fly systematics up to 1960 and a review of the genera (Insecta: Trichoptera).- 17. Caddis larvae in a dutch lowland stream.- 18. Trichoptera in the Ilona stream of the Mátra Mountains, North Hungary.- 19. Faunistic investigations on Bulgarian Trichoptera to June, 1980 with a revised check-list.- 20. Diversity of Adult Trichoptera in a 'Non-Seasonal' Tropical Environment.- 21. The phenology of dispersal of several caddisfly (Trichoptera) species in the Island of Crete.- 22. New Trichoptera species and subspecies found in Italy.- 23.Comparative SEM and TEM studies on the androconial structures of Lasiocephala basalis Kol. and other Trichoptera.- 24. First list of Italian Trichoptera.- 25. Gregarines in Trichoptera larvae.- 26. The Trichoptera component in the hydrophyton of Lake Chiusi (Tuscany).- 27. Ecological profiles in three Rhyacophila species.- 28. Morphological characteristics of Leptodrusus budtzi Ulm. in the immature stages.- 29. Taxonomic and morphological characteristics of the Sericostoma italicum Moret. and Sericostoma pedemontanum McL. larvae.- 30. Trichoptera in the intestinal content of certain fish species.- 31. Trichoptera of the Isle of Elba (Italy-Tuscany).- 32. A phylogeny and classification of family-group taxa of Leptoceridae (Trichoptera).- 33. Distribution of Trichoptera families in Australia with comments on the composition of fauna in the south-west.- 34. On the evolution of the phallus and other male terminalia in the Hydropsychidae. With a proposal for a new generic name.- 35. Bibliography of Trichoptera.- 36. Trichoptera distribution pattern differences found by sweeping, beating and light traps at three southern Bohemian sites.- 37. Why do Potamophylax cingulatus (Stheph.) (Trichoptera) larvae aggregate at pupation?.- 38. The influence of reservoir discharge on benthic fauna in the River Ter, N.E. Spain.- 39. Les larves de Trichoptères de la rivière Llobregat (Catalogne, Espagne). Distribution longitudinale et relation avec la qualité de l'eau.- 40. Responses of the Sericostomatid caddisfly Gumaga nigricula (McL.) to environmental disruption.- 41. Trichoptera of Western Switzerland.- 42. Overwintering strategies in some Norwegian caddisflies.- 43. Preliminary interpretations of the distribution of Hydropsychidae in a regulated river.- 44. A progress report onHydropsychidae from the Ivory Coast: Characters for the specific identification of larvae and population dynamics of four abundant species.- 45. Occurrence of the genus Hydropsyche in the North American Great Lakes.- 46. Cycles biologiques des Hydropsychidae et d'un Polycentropodidae (Trichoptera) dans le Rhône en amont de Lyon.- 47. The principles of case building behaviour in Trichoptera.- 48. Altitudinal distribution and abundance of Trichoptera in a Rocky mountain stream.- 49. Larval behaviour and dispersion of Pycnopsyche luculenta (Betten) demonstrated by a unique tagging method (Limnephilidae: Trichoptera).- 50. Considerations on the relevance of immature stages to the systematics of Trichoptera.- 51. Quaternary sub-fossil Trichoptera larvae from a site in the English Lake District.- 52. A proposed setal nomenclature and homology for larval Trichoptera.- 53. Some aspects of the life history and feeding ecology of Dolophilodes distinctus (Walker) in two Ontario streams.- 54. Observations and a theory on the building style in Potamophylax latipennis (Curt.) Neb. Trichoptera, Limnephilidae.- Indexes.