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Morphometric and graphical studies on selected sclerotized characters (head capsule width, postgenal length and body length) showed that there are seven larval instars in Simulium (Wilhelmia) pseudequinum Séguy. The length of the antenna was not useful for determining the instar number. The mean...
The life cycles of Stenacron interpunctatum (Say), Stenonema femoratum (Say), 5. luteum (Clemens), S. vicarium (Walker) and S. modestum (Banks) are described in a small southern Ontario stream. All five species shared similar life cycles. With the exception of S. femoratum each species was...
The autor describes and figures two new species of stoneflies of the NW of the Iberian Peninsula, Leuctra gallaeca sp. n. and Leuctra auriensis sp. n. Some ecological data are added.
CRAIG, J. F. and J. B. K.EMPER (eds.) (1987): Regulated Streams. Advances in Ecology. ‐Plenum Press, New York and London X + 432 pp.; ISBN 0–306–42674–9; $ 79.50 in the United States and Canada, 20% more elsewhere. BERNER, L. and M. L. PESCADOR (1988): The Mayflies of Florida. Revised Edition....
Four species of the family Hydropsychidae (Trichoptera) and one species of Philopotamidae (Trichoptera) which coexist in the lower reaches of the Ardeche River (France), from Ruoms to St‐Martin‐d'Ardeche, were studied from July 1982 to December 1984. In order of decreasing importance they are:...
Nemoura cinerea and Nemurella pictetii populations were studied in two lowland streams in southern Poland. The size‐frequency and the Zelinka methods were employed to estimate their production. The production, as measured by the two methods, proved strongly dependent upon the character of the...
The male of Hydraena (Haenydra) tatii sp.n. is described and illustrated. It is known from three localities in the Sierra Nevada, Granada (southern Spain). Ecological notes are provided.
Specimens of Baetis fallax (Hagen, 1864) and B. zebrata (Hagen, 1864) were collected on the Island of Corsica. Imagines were obtained by breeding and were investigated morphologically and biochemically. Our results show that B. fallax belongs to the genus Electrogena Zurwerra & Tomka, 1985 (= E....
Setodes fluviovivens sp. n. is described and figured from material collected 1914 on the Mekong River in Kambodia.
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