Life History of the Ephemeridæ

Abstract

I HAVE been asked by a French observer, M. A. Gros of Marigny (Jura), France, if I can put him into touch with entomologists interested in the Ephemeridæ. M. Gros is the author of an illustrated brochure, “ Études sur les premiers études des éphémères du Jura français,” which deals mainly with Ecdyonurus forcipula of Central Europe—not, I believe, found in the rivers of the British Isles. M. Gros would prefer to correspond in French if possible. He appears to have established some interesting facts, which may help us in our endeavours to transplant water-flies from one river to another. So many causes are denuding our rivers of their natural supplies of Ephemeridæ, etc., that it is most important to introduce fly from other waters if possible. It has been done, at least temporarily, in a few instances.