rong>Travauxrong> du Musdurn National d'Histoire Naturelie ((Grigore Antipa* Vol. XLIII pp. 437-456 2001 rong>DRrong>. rong>LAZARErong> rong>BOTOSANEANUrong> rong>ATrong> rong>75rong> rong>YEARSrong> The well-known zoologist, or better said limnologist, Lazare Botosaneanu, was born in Bucharest (Romania) on the 28Ih of May 1927; he graduated from the grammar and secondary studies in the same city. He was already interested in zoology as a youngster. He attained lectures at the Faculty of Biology of the Bucharest University between 1945 and 1949; the professor who had the greatest influence on him was the prominent zoologist Constantin Motaq (1891-1980). L. Botosaneanu graduated in 1949 and was appointed the same year assistant at the chair of Hidrobiology of the Faculty of Biology. In 1956 he moved as a senior research worker at the Institute of Speology. This institute, the oldest in the world, devoted to the study of the underground habitats and their fauna, had been founded by Emil Racovitl at Cluj, in 1920, and reorganized in 1956 by prof. C. Mota~ Cjust set free from seven years of political imprisonment), with one section in Bucharest and another one in Cluj. Dr. Botosaneanu had a fruitful research activity in this institute during 22 years, but, having sent a series of letters to the "Free Europe" broadcast, criticizing the anti-scientifical politics of the Ceau~escu government, he was dismissed from the Institute and had to leave Romania in 1978 like his wife and daughters. He stayed for a short period at the Limnological Station of the Max Planck Institute in Schlitz, but was soon invited by prof. Jan H. Stock at the Institute of Zoology of the Amsterdam University. His activity. and publications having been examined by the Rectorate of the University, he was appointed senior research fellow of the sections of entomology and of carcinology of the Amsterdam Ecological Museum. The two main fields of scientific activity of dr. Botosaneanu are: - the systematic, zoogeographic and ecological study of the insect order Trichoptera (caddisflies); - the study of the underground aquatic fauna, especially some groups of Isopod Crustaceans. He published valuable contributions to the knowledge of the caddisfly fauna of Romania (mainly of the Carpathian mountains) and of other European countries, of the Near East, of northeastern Asia and of most Carribean islands; he also published some fossil amber caddisflies. He described some 300 new species of these insects. His publications on caddisflies are all abundantly illustrated and often accompanied by zoogeographical considerations (remarkable being his 1962 zoogeographic analysis of the caddisfly fauna of Romania) and by considerations on relationship. Although most of his taxons were based upon studies of adult insects, whenever possible the young instars were also associated and described. L.