32 THE CANADIAN ENTOMOLOGIST 



Turning to the book, the introduction gives the names and 

 descriptions of the various parts, a few of which have been altered 

 from those used in the NoctiiidcB, so as to adopt names which had 

 the right of priority of usage and it is to be hoped that no further 

 changing will be necessary. 



This is followed by a classification of the British species based 

 on the male and female genitalia, comprising 78 pages. The 

 family is divided into two primary divisions, designated as 

 Gnathoi and AgnaiJioi, according to whether the gnathos is present 

 or absent. The former comprises ten and the latter fifteen sub- 

 families, producing an arrangement quite unfamiliar and which 

 will no doubt give food for thought and pen to those who hold 

 that no classification should be based on one set of characters only. 



The figures of the male organs are given on 48 plates — the 

 name of the species being printed below each drawing — a decided 

 improvement on having numbers and a key somewhere else. In 

 many cases the female genitalia are figured to the left of the male. 



The book and its illustrations, showing not only the diversity 

 but also the wonderful beauty of these structures as exhibited in 

 one single family, cannot help being of the greatest interest to 

 Lepidopterists and I am sure that the author will gladly extend to 

 any of our readers the privilege offered the writer in a recent 

 letter, namely to give his assistance in forming opinions on the 

 connections of certain species or' genera. 



A. F. Winn. 



We would remind our readers that subscriptions are now 

 due, and that these and all other business matters connected with 

 the Society or Magazine, such as advertisements, requests for 

 back numbers, etc., should be addressed, not to the Editor, but to 



THE ENTOMOLOGICAL SOCIETY OF ONTARIO. 



Guelph, Canada. 



Mailed January 8th, 1915. 



