178 [July, 



new chapter on the transmission of diseases by insects having been added in 

 the present edition, as well as much new matter, some new illustrations, &c. 

 It is of course mainly based upon American forms, and the commoner kinds are 

 selected in order that the reader may easily use the text as a guide to personal 

 observation. The author restricts his subject to the true Insecta, or Hexapoda, 

 and he divides the contents of the book into 13 chapters— Classification, 

 Anatomy and Physiology, Development, Adaptations of aquatic insects, Color 

 and coloration, Adaptive coloration, Insects in relation to plants, Insects in 

 relation to other animals, Transmission of diseases by insects, Interrelations of 

 insects, Insect behaviour, Distribution, and Insects in relation to man. Of the 

 304 illustrations in the text many have been prepared by the author, and the 

 others are taken from acknowledged sources. Plates I and II show the suc- 

 cessive stages in the pupation and emergence of the milkweed butterfly, Anosia 

 plexippus ; III gives the Faunal realms, after Sclater and Wallace ; and IV 

 illustrates the Life Zones of the United States, after Merriam. A copious 

 bibliography (extending to 48 pages), including references up to 1913, is 

 appended. The Chapter (XII) on Distribution is perhaps a little out of date, 

 that of Sharp on the Coleoptera of the Hawaiian Islands (1885), quoted on 

 pp. 304, 305, giving 428 species, whereas Perkins (1913), brings the number up 

 to 1,288 for the same islands. The book is well edited throughout, though a 

 startling misprint is to be found on p. 246, where the human flea is named 

 Culex irritans ! 



"A Textbook of Medical Entomology," by Walter Scott Patton 

 M.B., I.M.S., and Francis William Cragg, M.D., I.M.S., F.E.S.: pp. xxxiii + 

 764, pis. 89 : Christian Literature Society for India, London, Madras and 

 Calcutta, 1913. 



In reviewing a comprehensive work of this kind it is obviously impossible 

 for us to give more than a general notice of its contents, dealing as it does with 

 so many branches of entomology. The " Textbook," as the authors state in 

 their preface, is really a guide to the study of the relations between Arthropods 

 and disease, rather than a text-book on entomology in the wide sense. It has 

 been compiled to supply the requirements experienced by isolated medical and 

 veterinary officers practising in the Tropics, who find it impossible to derive 

 much information from the scattered literature they are able t© obtain on the 

 subject. The authors arrange their matter under twelve chapters : I. Entom- 

 ology as a branch of preventive medicine, Zoological position of the blood- 

 sucking Arthropoda ; II-IV. The Order Diptera, the anatomy and physiology 

 being dealt with in Chapter II ; V. Siphonaptera, or Fleas ; VI. The Rhynchota, 

 or Bugs ; VII. Anoplura, or Lice ; VIII. Order Acarina : Ixodidse, or Ticks ; 

 IX. The Acarina -. Acari, or Mites ; X. Sect. 1. The Order Pentastomida : Lin- 

 guatulidse, or Tongue Worms. Sect. 2. Order Eucopepoda ■. Cyclops, or Water 

 Fleas ; XL Laboratory Technique ; XII. The Eelations of Arthropoda to their 

 Parasites. The sections on internal anatomy contain a large amount of original 

 matter, the descriptions in nearly all cases having been written and the figures 

 drawn from dissections specially made for the purpose. The external anatomy 



