1 - 10 of 10 articles
Abstract This is the second paper in a series on the emergence patterns of aquatic insects from a sandstone‐shale first‐order stream of northwestern Pennsylvania. Fifteen species, with 6,708 specimens, in six families were collected from the Sixmile Creek site over five years. Adults occurred...
Abstract Descriptions are given for the three larval instars of Agabus approximatus Fall 1922 and A. congener (Thunberg 1794) based on reared specimens from northern Sweden. Characters are provided to separate the larvae of these two very similar species. Notes on the natural history of both...
Abstract The pupa of the elmid beetle, Lara avara is described. This pupa is similar to other pupae in the Elmidae, differing mainly in its large size, and the presence of lateral projections on the abdominal tergites. A description of the pupal habitat is included. Diagnostic characters of...
ZAHRADNIK, J. (1982): Der Kosmos‐Insektenführer Ein Bestimmungsbuch mit 780 Farbbildern von F. Severa. — Franck'sche Verlagshandlung, Stuttgart, 320 pp., 29.50 DM.
Abstract The diel periodicity of mayflies was investigated in a Laurentian stream in 1966. The peak period of emergence of mayflies was found to be between 13:00 and 16:00 h (Eastern Standard Time) during the first month of the season and the emergence was more dispersed during the rest of the...
Abstract Light trap catches of caddisflies from the River Danube at Veröce in Hungary in 1980 are analysed. They are compared with catches from Linz on the Danube and from sites on the Rhine. It is suggested that light trap catches of caddisflies are a useful indicator of water quality in large...
Abstract Colymbetes schildknechti sp. n. from Sardinia is described and illustrated. A key for adults of European species of the genus Colymbetes is presented.
Abstract Descriptions are given of all three larval instars of Coelambus novemlineatus (Stephens, 1829) based on reared specimens from northern Sweden. A key to third‐instar larvae of six European species of Coelambus is provided. Larva of C. novemlineatus is very similar to that of C. marklini...
Abstract Only two Hydropsychidae, Hydropsyche siltalai and H. pellucidula inhabit the Oselven river system in Western Norway. Both complete their life cycles in one year, having fairly synchronous moulting patterns. H. siltalai flies in late summer and early autumn; the median day of the flight...
Read and print from thousands of top scholarly journals.
Continue with Facebook
Log in with Microsoft
Already have an account? Log in
Bookmark this article. You can see your Bookmarks on your DeepDyve Library.
To save an article, log in first, or sign up for a DeepDyve account if you don’t already have one.
Sign Up Log In
To subscribe to email alerts, please log in first, or sign up for a DeepDyve account if you don’t already have one.
To get new article updates from a journal on your personalized homepage, please log in first, or sign up for a DeepDyve account if you don’t already have one.