A KEY TO THE MAJOR GROUPS OF BRITISH FRESHWATER INVERTEBRATES. By P.S. Croft. A Field Studies Council publication.

(1986) 2021 reprint. Large 8vo paperback (175 x 245mm). Ppiv,60. B/w line drawings.

This is a very useful guide, published as part of the Aids to Identification In Difficult Groups of Animals and Plants scheme. It is a very detailed guide to identification of freshwater invertebrates, both in the adult and larval stages. Contents include; Major groups of freshwater invertebrates; The orders of insects found in fresh water; Freshwater arachnids; Freshwater crustacea; Freshwater bivalves; Freshwater snails; Families of true flies; Families of leeches; Families of water bugs; Families of water beetles (adults only); Families of mayflies (nymphs); Families of caddis flies (larvae). Aimed at biologists making a collection for scientific purposes, but a really useful key for the angler-naturalist. Contents have been reset and repaginated from the first edition.