232 Journal New York Entomological Society. [v<.i. xiv. 



journals he has to purchase, to keep up to date, is already too great. 

 Unless the Entomological Society of America can absorb one or more 

 of the existing societies, we think its formation not only useless, but 

 ill-advised. 



A recent article by Mr. Witmer Stone {Science, n. s., xxiv, 560, 

 1906), brings forward again the question of determining the types of 

 genera by the first species method. The article favors the method and 

 is in accordance with our own views. We hope that the International 

 Zoological Congress will consider this question at its meeting next 

 summer and, if possible, adopt the principle. A question of nomen- 

 clature, which we have not seen discussed, and which our codes do 

 not cover, is the matter of the identification of type species. This is 

 equally pertinent by the elimination method of fixing types or any 

 other method. If (by any method) a type is found for a genus, the 

 question arises as to what that species was. The author may have 

 mentioned an old species. Is the type of the genus the old species 

 mentioned, or is it the species the author had before him under that 

 name, perhaps a very different species, misidentified? There ought 

 to be a rule to solve such cases. 



Book Notice. 



Entomology, with Special Reference to its Biological and Economic 

 Aspects. By Justus Watson Folsom, Sc.D. Philadelphia, P. 

 Blakiston's Son & Co., 1906. 



This book makes a distinct departure from our usual text-books on 

 entomology, in that classification and taxonomy are reduced to a 

 minimum, their place being taken by a general account of the struc- 

 ture and histology of insects, with their habits, adaptations, and the 

 many interrelations that the subject suggests. It is interesting read- 

 ing to even advanced students and a mine of information to the 

 beginner. We commend the work heartily. It should be read in con- 

 junction with some other work dealing more fully with classification. 



