432 EXTOMOLOGICAL NEWS [NoV., 'l2 



Elementary Entomology, By E. Dwight Sanderson, Dean of the 

 College of Agriculture, West Virginia University, Director West Vir- 

 ginia Agricultural Experiment Station, and C. F. Jackson, Professor 

 of Zoology and Entomology, New Hampshire College. Ginn & Co., 

 Boston. New York, Chicago, London. 8vo, cloth, pp. vii, 372, 496 figs., 

 price $2. Not dated on the title-page. Copyrighted 1912 by the 

 authors. 



This is intended by the authors as a text for beginners and "is con- 

 fessedly very largely a compilation from the works of others." The 

 right and proper ground is taken that general entomology is the founda- 

 tion upon which economic entomolog\' is to "be erected, and without a 

 knowledge of the elements of entomology a course in economic ento- 

 mology will have but little meaning to the average student, whereas if 

 the more general knowledge of the subject has been mastered, the 

 study of the various insect pests may be profitably pursued by the indi- 

 vidual, even if he has not been able to take a systematic course in that 

 phase of the subject." 



After an Introduction of four pages, in which the pathologic and 

 economic importance of insects to man is briefly stated, the book is 

 divided into three parts. Parts I., The Structure and Growth of 

 Insects, (pp. 5-66) and II., The Classes of Insects, (pp. 67-274) are 

 by the senior author; Part III., Laboratory Exercises, (pp. 275-358) 

 by the junior. 



In comparison with some other text-books of about the same size, 

 Part I. is much less detailed than the corresponding parts of the well- 

 known texts of Folsom and of Carpenter, but of nearly the same 

 length as that of Smith. Part II. is much longer than Folsom's treat- 

 ment of the same topic, but not more extended than those of Smith 

 and of Carpenter. There is but little, and that incidental, in this new 

 book corresponding to Carpenter's chapters on Insects and Their Sur- 

 roundings, and The Pedigree of Insects, or to Chapters IV to XIII of 

 Folsom. A strictly economic section, which might perhaps have in- 

 cluded some of the material of Smith's Part III. (.Insecticides, Preven- 

 tives and Machinery), has been intentionally omitted by Messrs. Sander- 

 son and Jackson, as tending to make the book "too cumbersome; in- 

 deed, it is usually not possible to cover both elementary and economic 

 entomology in a single course." 



From the three older texts this work differs in giving Laboratory 

 Exercises (Part III.), which are a less usual feature in entomological 

 manuals. These exercises deal with the External anatomy of the 

 locust (:. e. grasshopper), A comparison of the different types of 

 Arthropoda, A comparison of different types of insects: bee. fly and 

 beetle, The internal anatomy of the locust, The mouth-parts of insects, 

 The life-history of insects, and The classification of insects. Sixty-seven 



