THE CANADIAN ENTOMOLOGIST. 313 



BOOK NOTICES. 



Elementary Entomology, by E. Dwight Sanderson and C. F. Jackson, 

 Ginn and Co., Boston. Price $2.00. 



The appearance of this work so soon after the senior author's excel- 

 lent book on "Insect Pests of Farm, Garden and Orchard" comes as a 

 surprise but a very welcome surprise to students of entomology. The 

 book is intended primarily as a text book for short courses in entomology, 

 but covers the systematic side of the work so well that it will probably be 

 used by many teachers for all but their most advanced classes. 



The. book contains three hundred and seventy-two pages with four 

 hundred and ninety-six illustrations of a very superior character. It is 

 divided into three main divisions. Part I, consisting of sixty-six pages, 

 deals with the structure and growth of insects. A few pages of this section 

 are given to a description of the differences between insects and closely 

 allied invertebrates ; the remainder is devoted to a concise and clear 

 account of the external and internal anatomy of insects, and to their growth 

 and transformations, the latter being illustrated by the life history of a few 

 common species. The section throughout shows abundant evidence of 

 skilful handling of a somewhat difficult subject. The only criticism that 

 suggests itself is that instead of taking two examples of complete metamor- 

 phosis from Lepidoptera, it might have been better to have chosen one of 

 these from some other order. However, this is a minor point. 



Part II, which contains two hundred and two pages, deals with the 

 classes of insects. For convenience these have been divided into nine 

 groups: Aptera, Orthoptera, Neuropteraand Pseudoneuroptera, Platyptera, 

 Hemiptera, Coleoptera, Lepidoptera, Diptera, and Hymenoptera. The 

 various orders which have been put into one group, such as, for instance, 

 the Neuroptera and Pseudoneuroptera, are mentioned and their character- 

 istics briefly given. In each order a large percentarge of the families are 

 described, those of economic importance being given the preference. In 

 bringing out the characteristics of the different families, copious illustra- 

 tions have been used. One can scarcely give this side of the work too 

 much credit as the photographs and drawings are not only excellent works 

 of art in themselves but in a very large proportion of cases show the differ- 

 ent stages in the life history of the insect described and thus enable the 

 student to understand and remember them much better. 



