118 THE CANADIAN ENTOMOLOGIST. 



written much are apparently neglected. But it is precisely such genera 

 which should be brought together in a work of this kind. A number of 

 genera of which it may with confidence be predicted that they will never 

 come into use, are cited, while genera now in constant use are omitted. 



BOOK NOTICES. 



Bulletin No. 7. Insects Injurious to Forest and Shade Trees, by A. 

 S. Packard, jr., M. D. Issued by the Department of the Interior, U. S. 

 Entomological Commission.; 8vo., pp. 275, with 100 illustrations. 



The object of this Bulletin, as stated in the introduction to it, is to 

 give to the public a brief summary of what is up to this time known of 

 the habits and appearance of such insects as are injurious to the more 

 useful kinds of trees. Beginning with the insects injurious to the various 

 species of Oak, the author treats of those which injure the Elm, Hickory, 

 Butternut, Chestnut, Locust, Maple, Poplar, Linden, Birch, Beech, Tulip 

 Tree, Horse Chestnut, Wild Cherry, Ash, Alder, Willow, Pine, Spruce, 

 Balsam, Juniper, Tamarack, Arbor Vita?, and others. A large proportion 

 of the work is occupied with descriptions of those insects which injure the 

 more important forest trees, such as the Pine and Oak. This is a most 

 useful synopsis of our knowledge in this department, and its issue will no 

 doubt greatly stimulate the progress of Entomology in this practical direc- 

 tion, for while it shows that much has been done in some of the most 

 important departments, in many others our knowledge is extremely scanty. 

 This work is conveniently arranged, and like the other works of this 

 distinguished author, well written in a plain and popular style, and will 

 commend itself to all who are interested in preserving our forests and 

 useful shade trees from destruction by insect foes. 



(A Fragment of a) Guide to Practical Work in Elementary Ento- 

 mology. An outline for the use of students in the Entomological 

 Laboratory of Cornell University, by J. Henry Comstock ; 8vo., pp. 35. 



This work is divided into two chapters, the first of which treats of the 

 terms denoting the position and direction of parts in insects, the second 

 of the external anatomy of a grasshopper, Caloptemis fetnur-rubrum. A 

 useful guide to all those entering on the study of Entomology. 



