344 



REVIEW. 



Insect Pests and Fungus Diseases. By P. J. Fryer. (Cambridge 

 University Press, 1920. 45s. net.) 



A book dealing somewhat exhaustively with the pests, zoological and fungoid, ot fruit 

 and hops, with the requisite attendant mechanical and chemical appliances and their use 

 in combating them. The whole design of the work is evidence of the author's intent towards 

 its practical use by cultivators, as evidenced by the classification of the material therein 

 contained into headings embracing every detail for rapid reference. It is also happy in 

 not pre-supposing that every grower has found time or inclination for the possession of 

 knowledge on entomology or plant structure. 



There are subtleties with regard to insects of economic importance that must be left 

 for elucidation by the entomological expert, and translated by him into broad methods of 

 treatment for the grower, who ever considers control before nomenclature and details; 

 nevertheless accuracy is worth something for its own sake, and the entomologist, as such, 

 will not be disposed to overlook the much useful information for the practical man contained 

 in this book, because of such things as the common wasp being termed Vespa crabro and 

 there being some originality in insect classification under the heading of "scientific." 



The chemical side, with apparatus, is quite adequately dealt with in a most useful way, 

 and there are calendars and tables, including capacity and quantitative estimation results, 

 that cannot fail to be of value. 



The work is full of illustrations, some coloured. A number of those derived from the 

 camera are likely to prove a useful aid to identification of the subjects with which they 

 deal, but the same cannot be said of the reproductions from drawings, which detract from 

 the appearance of the work, which in this respect requires to be again judged by the counter- 

 balance of other matter. 



In a second edition the author would find it an advantage to do some re-editing in 

 collaboration with an entomologist. 



It should have been noted above that this review has been made solely from the 

 entomological standpoint. 



R. S. 



