240 THE CANADIAN ENTOMOLOGIST. 



BOOK NOTICES. 



Bulletin No. 3 U. S. Department of Agriculture, Division of Entomology ; 

 8vo., pp. 75. 



We are indebted to Prof Riley for this useful report of observations 

 and experiments in the practical work of the division. It contains further 

 notes on the Army Worm, details of an interesting series of experiments 

 with Pyrethrum powder on larvge, notes on forest-tree insects by Dr. A. 

 S. Packard ; on the Cotton Worm and the machinery which has been de- 

 vised for destroying it, and on the tree borers of the family Cossidce, by 

 the late Dr. J. S. Bailey, of Albany, N. Y. The closing paper is by W. 

 McMurtrie, on tests of silk fibre from cocoons raised at the Department. 

 This report contains much valuable matter. The paper on the Cossidce 

 is illustrated by two plates beautifully executed ; there is also a plate 

 illustrating the chapter on silk fibre. 



A Bibhography of Fossil Insects; by Samuel H. Scudder; republished 

 from the bulletin of Harvard University ; 8vo., pp. 47. 



A valuable compilation, which will greatly aid the student in this de- 

 partment of natural science. 



On the Color and the Pattern of Insects ; by Dr. H. A. Hagen : from 

 Proceedings of the American Academy of Arts and Sciences. 



In this paper the author discusses the various theories which have 

 been propounded to account for the diversity of pattern and color in in- 

 sects, reviewing the facts which have been cited for their support. It is a 

 most interesting and instructive article, at the conclusion of which the 

 writer expresses his conviction that color and pattern in insects are pro- 

 duced by physiological processes in the interior of their bodies. 



Bulletin of the Buffalo NaturaHsts' Field Club. 



The fifth number of the first volume of the records of work done by 

 this enterprising body of naturalists is before us. It includes notes on 

 Protozoa, by Prof. Kellicott ; also papers on the Butternut, Indian Relics 

 and other interesting subjects, followed by botanical and ornithological 

 notes. This serial is handsomely gotten up, well printed on excellent 

 paper, and is in every way a credit to its promoters. 



(October No., issued Nov. 27, 1883.) 

 (November No., issued Jan. 17, 1884.) 



