BOOK REVIEWS FOR MARCH 117 



vertical stripes, yet there is no discussion of the evolutionary 

 significance, or possible interpretation of such changes. One of the 

 best chapters dealing with material that the author is particularly 

 well versed in, is the chapter on "Young Birds in the Nursery". 

 It is filled with well authenticated instances of some remarkable 

 performances among birds in the rearing of their young. All but 

 two chapters, the last two, consisting of 32 pages, deal with the 

 vertebrates. The first four have to do with the mammals, then 

 three^-100 pages — are devoted to birds, two — 23 pages to the 

 reptiles, chapter eleven is on tadpoles and chapter twelve on the 

 infancy of fishes. On the whole the book is well worth adding to 

 the nature-study library; it is illustrated with many photographs 

 and drawings. Its perusal will add much to the stock of information 

 which every naturalist needs and much of the information will 

 be found to answer questions that have been long unanswered in 

 the mind of the average nature instructor. 



Elementary Entomology, by E. Dwight Sanderson and C. F. 

 Jackson, pp. VII plus 372, Ginn & Co. Price $2.00. 



This book by two competent entomologists is intended to sup- 

 ply a text for a short course in elementary entomology. Part One 

 is devoted to the structure and growth of insects and is about 

 equally divided between the anatomy and transformations of 

 various insect types and groups. Part Two is descriptive and deals 

 with the classes of insects. This makes up the body of the book, 

 some 200 pages, and systematically treats of the various insect 

 orders devoting most space to those that are of economic import- 

 ance, though the book makes no attempt to be an economic 

 entomology. Part Three consists of laboratory exercises and gives 

 methods of collecting, preserving and studying. A valuable 

 feature of this short part is a key to the orders of insects. There 

 is little or no attempt to include anything excepting the con- 

 ventional material and indeed, one would not expect new material 

 to appear in a text book. There does appear to be included results 

 of late investigations, however, and the illustrations are drawn 

 from modern sources. The treatment is concise yet clear and 

 interesting. 



The publisher and price were inadvertently omitted from the 

 Review of Minots Modern Problems oj Biology in the January 

 number. It is from the press of P. B. Blakisfor's Son & Co., and 

 the price is $1.25. 



