200 THE CANADIAN ENTOMOLOGIST. 



entomologists. A number of forest insects are common to both 

 countries. Our great regret is that, being written in the Swedish 

 language, its contents will not be accessible to all who would wish 

 to study it with care. The latter desire and the nature of its con- 

 tents may, however, induce some to add another language to their 

 vocabulary, for the excellence of its treatment would almost warrant 

 such a venture. 



After preliminary chapters on the characters and organization 

 of insects, their development, and the general methods of control, 

 the a:uthor takes the different orders, commencing with \he Coleop- 

 tera, and describes those families and their members that are in- 

 jurious to the forests, or useful as parasitic or predaceous enemies 

 of forest insects. His treatment is somewhat along similar lines 

 to that of Taschenberg in his " Praktische Insektenkunde." In 

 the longest chapter, namely, the Coleoptera (Skalbagga). the 

 following families are dealt with: Carabida?, Staphylinida\ Sil- 

 phida, Histeridae, Cantharidae, Clerida?, Elateridae, B-jprestida^, 

 Lymexylonidae, Anobiida?, Coccinellidae, Cerambycida^, Phytophaga, 

 Curculionida?, and Ipida;, the last .of course, is treated the most 

 extensively. The chief injurious species (or useful species as the 

 case may be) in each family are considered individually and a 

 description sufficient to enable the insect to be identified is given; 

 the larva', habits and methods of control are also described in most 

 cases. The excellent series of illustrations, largely original photo- 

 graphs, constitute a valuable feature of the volume. Where the 

 insects are of serious importance, special attention is devoted to 

 them, for example, the Nun Moth, Lymantria monacha L, whose 

 introduction may we be spared, is given eleven pages; the Gipsy 

 Moth hardly receives two pages! 



A special chapter is devoted to gall-making insects and 

 Eriophyes, and after a useful chapter on control measures, the book 

 concludes with a table gi^'ing keys to the various insects according 

 to the trees and parts of the trees they attack. We cannot say 

 more than that we wish we had a similar work on our own forest 

 insects. Perhaps the author will make his book more accessible 

 to English-speaking readers by translating it some day, a task of 

 which we know he is capable. C. G. H. 



Mailed June 4th, 1915 



