90 REPORT OF No. 19 



FoLSOM, J. W. Entomology with Special Reference to its Biological 

 and Economic Aspects. (P. Blakiston's Son & Co., Philadelphia, 485 pp., 

 with five plates (one coloured) and 300 text figures, |3.00.) The number 

 of works in the entomologist's working library is already very large, but 

 few active workers will be able to do without Dr. Folsom's recently issued 

 magnificent work. In Packard's Guide, Comstock's Manual, and Kellogg's 

 American Insects, classification is the prevailing idea, and is most useful and 

 necessary ; but in the present work the main object has been to supply in a 

 concise form biological data. Familiar insects are used and the work is copi- 

 ously illustrated with figures of the highest class. A short chapter on Clas- 

 sificatlion, consisting of only 26 pages, begins the work. This, it may be 

 thought, might have been extended to possibly twice its length with advan- 

 tage. Chapter 2 on Anatomy and Physiology treats the subject in a delight- 

 ful and fascinating manner. The same may be said of the next chapter on 

 Development, in which typical insects only are dealt with in a suggestive 

 manner. The titles of the remaining chapters are well chosen and the sub- 

 jects effectively treated. They will be read with the greatest pleasure by 

 all. Adaptations of aquatic insects, Colour and Coloration, Insects in 

 relation to plants and to other animals, The Inter-relations of Insects, and 

 Insects in relation to man, are subjects well dealt with in a concise and 

 plain way, which can be understood by students. We believe that this work 

 will do much to render the science of entomology much more popular than 

 it must be acknowledged it has been in the past among students of agricul- 

 tural colleges and others, notwithstanding the enormous economic import- 

 ance of the subject, as shown by the annual losses in staple crops. 



Packard, A. S. Monograph of the Bombycine Moths of North America, 

 Part II, Ceratocampidpe. (Memoir IX, National Academy of Sciences, 

 Washington, D.C., 1905, 4to, pp. 149, 61 plates, 24 coloured.) This is g, 

 most valuable work, giving full life-histories of the Ceratocampid moths 

 of North America. The subject is treated of in Dr. Packard's masterly 

 manner, and the plates, which are most beautiful, have been drawn by 

 Messrs. J. Bridgham and L. H. Joutel, or are reproduced from photographs 

 by Mr. A. H. Verrill. In looking through this work, we are sadly reminded 

 that Dr. Packard's death removes one whose name has been such a watch- 

 word for good work in American entomology and takes a shining light from 

 the ranks of the leading American scientific men who have done so much 

 to uphold the standard of scientific excellence on this continent. The col- 

 oured illustrations, which are chromolithographs by A. Hoen & Co., of Bal- 

 timore, are simply exquisite, and the whole work supplies one of the most 

 beautiful additions to the literature of the Lepidoptera of North America 

 which has ever appeared. It is to be hoped that the National Academy 

 may authorize Dr. Harrison G. Dyar or some of the many other accomplished 

 lepidopterists of the United States to give to the public similar Memoirs 

 upon oOier North American moths. 



Smith, J. B. Explanations of the Terms used in Entomology. (Pub- 

 lished by the Brooklyn Entomological Society, Brooklyn, N.T., price |2.00.) 

 This most useful work, which perhaps answers more exactly to the trite 

 expression that "it fills a long-felt want" than any recent publication, will 

 provide many entomologists with a handy book of reference, which will 

 enable them to understand the many useful, but in many instances unneces- 

 sary, unfamiliar terms which they frequently find in reading books dealing 

 with the study of insects. This volume contains over 150 pages and ex- 

 plains between four and five thousand terms of more or less frequent use. 

 One cannot read a page without feeling that many words have been made 



