The subfamily Microgastrinae is redefined; Cardiochilinae and Miracinae are placed as separate subfamilies. The Microgastrinae are divided into five tribes and 51 genera, 23 of which are new. The first two tribes, Apantelini and Microgastrini, have characteristically long ovipositor and are almost all solitary parasites of Microlepidoptera. The other three tribes, Forniciini, Cotesiini and Microplitini, have short ovipositor and are almost all parasites of Macrolepidoptera, usually gregarious. The genera Pseudapanteles, Parapanteles, Glyptapanteles and Protapanteles of Ashmead, Cotesia Cameron, Dolichogenidea and Diolcogaster Viereck are revived from synonymy, and the following new genera are described: Alphomelon, Choeras, Clarkinella, Deuterixys, Distatrix, Exix, Exoryza, Exulonyx, Iconella, Illidops, Nyereria, Papanteles, Paroplitis, Pelicope, Pholetesor, Rasivalva, Rhygoplitis, Sathon, Teremys, Venanides, Venanus, Wilkinsonellus, Xenogaster. Twenty new species are described and about 350 new combinations are given.

A revision of the species in the genus Pityophthorus Eichhoff in North and Central America is presented. The limits of Pityophthorus are expanded to include the species previously placed in Gnatholeptus Blackman. This unit is maintained as a subgenus. One additional subgenus is described, Hypopityophthorus, for P. debilis Wood and P. inops Wood. The genus contains 220 species in North and Central America. The principal subgenus Pityophthorus is divided into 47 species groups. New species are: micans (Mexico), sapineus (Mexico), miniatus (Honduras, Guatemala, and Mexico), pubifrons (Mexico), and acceptus (British Columbia, Wyoming). New synonymy is proposed as follows: P. deletus LeConte (= P. dolus Wood); P. exquisitus (Blackman) n. comb. (= P. inceptis Wood); P. intextus (= P. ornatus Blackman and P. limatus Wood); P. balsameus Blackman (= P. angustus Blackman) and P. indigens Wood (= P. irritans Schedl). Five species are given new status as subspecies: P. tuberculatus Eichhoff as a subsp. of P. pulchellus Eichhoff; P. subopacus Blackman as a subsp. of P. segnis Blackman; P. bellus Blackman as a subsp. of P. confusus Blandford; P. agnatus Blackman as a subsp. of P. confertus Swaine, and P. aurulentus Bright as a subsp. of P. murrayanae Blackman.The monograph includes an historical review, a discussion of diagnostic characters, and a discussion of the general biology of species in the genus. Keys to subgenera, species groups, and species are provided. Each species is described and many are illustrated, and all known bionomic and distributional data are included. Distribution records of many species are mapped.

This is the fourth in a series of manuals designed to facilitate the recognition of the Geometridae of Canada. In the introductory section key characters are given for the identification of Geometridae in adult, larval, and pupal stages. A generalized description of each stage is followed by a key to subfamilies of the Geometridae and a synopsis of the characters of the Ennominae. Keys to the four parts of the Ennominae (sometimes broken down into tribes) as they are to be treated in this series of manuals are supplemented by text descriptions, line drawings, and colour photographs. The distribution of many of the 41 species is shown on 23 maps.A section on the collecting and rearing of Geometridae has been added to the introductory part of this manual to encourage amateurs and young professionals to collect and rear Geometridae. The writer has enjoyed this part of the work more than any other and would like to see others share in the fun.

Ce mémoire est le deuxième d'une série consacrée à la faune des Trichoptères du Canada et des Etats adjacents. Il traite de la famille des Rhyacophilides qui, chez nous, n'est représentée que par le genre Rhyacophila. Les deux sexes de toutes nos espèces indigènes sont décrits et figurés. Des tables dichotomiques adéquates permettront la détermination. Des cartes montrent les répartitions géographiques. Les caractères écologiques des espèces sont mentionnés, chaque fois que cela s'est révélé possible.