Introduction à l’étude écologique des trichoptères des Pyrénées

Abstract

A presentation, in the form of a catalogue, of the principal findings drawn from the study of 204 species and subspecies of caddis-flies, gathered on the north slope of the Pyrenees. This work is based on adults collected in the last few years, as well as on a study of the collections of pyrenean caddis-flies of the Paris Museum of Natural History and of the British Museum. The principal results of the listing of the species in the area are indicated with the dates and localities that they were collected. For each species is indicated: 1) the previous mentions, 2) the class of abundance, 3) the distribution in the valleys of the north Pyrenees, 4) the month that the adults were gathered, 5) the habitat and the altitudinal range, 6) systematic remarks. 35 species - doubtful or inexact notations, synonymies - were eliminated from the list of the caddis-flies of the Pyrenees. The months of the gathering of the adults are indicated in a table covering the totality of the species. The forms with a long flight period are relatively numerous. The study of the captures of the adults in three different stations shows a shortening of the flight periods in hight altitudes, with only one maximum in July-August, above 1 400 m. The variations in the flight periods as a function of the altitude are different for the species of the precocious, intermediate and late fauna. The precocious fauna of the high mountains appears very limited in the Pyrenees. The autumnal fauna survives until December at high altitudes. © Masson, 1967.