117 



Nelson (J. A.). U.S. Bur. Entom. The Embryology of the Honey 

 Bee. — Princeton University Press, Princeton, and Oxford Univer- 

 sity Press, London, 1915, 282 pp., 6 plates, 95 text-figs. Price 

 $2.00. 

 A minute and detailed account of the embryology of an insect, even 

 of one so useful as the honey-bee, may possibly be regarded as an 

 academic study of value only to those interested in questions of cell 

 development and embryology in general. A work of this kind, 

 however, cannot fail to be of very great utility to the investigator of 

 the diseases of bees in the embryonic stage. This book claims to be 

 the most complete treatise on the subject yet pubUshed, and the 

 author has apparently spared no pains to make it exhaustive. As he 

 says in his preface, a knowledge of bee behaviour is important to the 

 beekeeper, and the anatomy of the bee is of consequence in this 

 connection. As the total time normally required for the development 

 of the egg is only 76 hours, the changes of structure take place rapidly, 

 and the author has shoAvn much skill and patience in differentiating 

 these, while the numerous text-figures enable them to be followed 

 readily. A table in which the whole process of development is sum- 

 marised and divided into 15 periods, is of great value. A bibliography 

 of 157 works on insect embryology is appended. 



Cecconi (G.). Manuale di Entomologia Forestale. [Manual of Forest 

 Entomology.]— i^^orewce, 1914-15, Ease. 1-3, 192 pp., 235 figs. 



The three parts so far issued of this book deal with the Italian 

 species of Orthoptera, Dermaptera, Lepidoptera and Rhynchota, 

 which are injurious to forests in Italy. It is hoped to complete this 

 work by the end of the present year, but the author, who is one of 

 the staff of the Forestry School at Florence, has met with difiiculty 

 in carrying out his original plan, which was, that all the illustrations 

 should be original. 



A brief description of the characters which distinguish each order is 

 given, as well of those families and species which directly or indirectly 

 can be regarded as forest pests. The illustrations are very numerous, the 

 stages of each insect and the nature of the damage done being figured 

 from carefully selected photographs. Under each insect is given its 

 synonymy and popular Italian name, as well as a description of the 

 various stages, with some account of its bionomics, the trees and 

 plants attacked, the damage done and the best methods of control. 

 For a large number of insects a table is given, divided into twelve 

 columns, one for each month in the year, from which the 

 distribution in time of any given insect in Italy may be seen at a 

 glance. This book, which is the first manual of Italian forest 

 entomology yet published, should be of very great value to those 

 interested in the subject, and it is to be hoped that the author will 

 be able to complete the work upon the same lines. 



Hewitt (C. G.). Report from the Division of Entomology for the 

 year ending March 31, 1914. — Dominion of Canada, Dept. Agric, 

 Dominion Experimental Farms, Ottawa, pp. 851-876. [Received 

 16th February 1916.] 



In the infested districts in eastern Canada efforts have been made 

 to keep the brown-tail moth [Euproctis ckrysorrlioea] in check by the 

 collection of winter webs and by the liberatien of natural enemies. 



