Interesting collection of Corixidae (Heteroptera) from a fish pond

Altogether 13 species of Corixidae were collected from a drained fish pond in southern Finland in the fall of 1999. Ten of the species had been breedi ng in the pond, and were thus permanent residents of the habitat. Two speci es, Sigara limitata and Sigara longipalis, were new to the province of Ta. In taxonomy of the family Corixidae, Glaenocorisa cavifrons(Thomson) is con sidered as a distinct species because it is sympatric with G. propinqua (Fi eber) in Scotland and in northern Finland.