THE CANADIAN ENTOMOLOGIST 363 



are then taken up in order, each being defined and the taxonomic 

 characters illustrated by outline figures of a typical species. Full 

 keys are given to the families, subfamilies and genera, and in the 

 great majority of cases also to the species, which in any case, 

 are full)' characterized. Lists of localities arjs given for each 

 species, with the names of the collectors, and the names are also 

 included of species not yet recorded from Connecticut ')ut likely 

 to occur there. The same general plan of treatment has been 

 followed in- the various authors though their methods dififer 

 slightly in detail. 



The chief author, Mr. Viereck, is responsible for the 

 Ichneumonoidea, Cynipoidea, Chalcidoidea, Chrysidoidea, Apoidea 

 and part of the Vespoidea; the Tenthredinoidea are by Prof. 

 MacGillixray, the Serphoidea and Proctotrypoidea by Mr. Brues, 

 the Formicoidea by Prof. Wheeler, and the Sphecoidea and greater 

 part of the Vespoidea by Mr. Rohwer. 



Besides the text figiires there are ten good half-tone plates 

 from photographs, on which are illustrated typical examples of 

 the order, including representatives of most of the superfamilies; 

 and also various types of Hymenopterous larvae, cocoons, nests, 

 galls, etc. 



This is a book which should be in every entomological 

 library and will be as indispensable to the general student as 

 Blatchley's Coleoptera of Indiana. 



The Blattidae of North America, North of the Mexican 

 Boundary. B\' Morgan Hebard. Memoirs of the American 

 Entomological Society, Number 2. Published by the Ameri- 

 can Entomological Society at the Academy of Natural Sciences, 

 Philadelphia, 1917. 284 + vi pp., 10 plates. 

 Students of Orthopteroid insects will all welcome the appear- 

 ance of this masterly revision of a difficult and perplexing group. 

 While a good many papers on the North American Blattidae, or 

 Cockroaches, have been published within recent years, we have 

 now for the first time a comprehensive review of the entire subject 

 from the systematic standpoint. It is in fact far more than a 

 review, for important new characters have been brought to light, 

 and no less than five new^ genera and eight new species are described. 

 A fifth new generic name, ParcohJatta ( = Platamodes Scudder, 



