Vol. XXvi] ENTOMOLOGICAL NEWS. 235 



of Entomology of Cornell Unhrertity during the put six years. Uore 

 specifically it is an illustrated revisioo and elaboratioa of his 'Notes 

 on the Relation of Insects to Disease,' published Jaauanr. 1912." It is 

 an excellent smmBary of prcaent information oo the subject, viewed 

 from the human side. 



The book is not, of course, limited to the insects, as ooe mi^t infer 

 from the first paragraph of the Preface just quoted, bat iadndes the 

 Arachnida, Myriopoda and. in one instance at least, the Crustacea also. 

 In the titles of the chapters. "Arthropods" b the group name moil 

 freq iw at ly employed. After a brief Introdnetioa (I) oo the "Early 

 •ogfcstioaa rcgardiaf the trawnrissioo of discaM fay insects" and "The 

 ways in which Arthropods nnjr affect the health of nan," there are 

 chapters on Arthropods which are directly poisonooa (II), Parasitic 

 Arthropods affecting man (III), Accidental or Pacoltattve Parasites 

 (IV), Arthropods as simple carriers of disease (V), as Direct inocu- 

 lators of disease germs (VI). as Essential hosts of pathogenic organ- 

 isms (VII). as Essential hosts of pathogenic Protoaoa (3 chapters. 

 Vni-X), and on Some possible but imperfectly known cases of Arthro- 

 pod transmission of disease (XI). The treatment of the subject is. 

 therefore, aoolofical rather than c nt oaoto g ical. and the title of tiie 

 book seems to as misleading, as a "Handbook of Medical Entomology" 

 leads one to expect primarily a consideration of the Arthropods pro- 

 dacing certain effects than of the effects dae to Arthropods. While 

 the order followed may be useful in a partly didactic course of lec- 

 tures, we do not find it wdl adapted to a bboratory course of instruc- 

 tion. 



The effects of mosquitoes are considered in four different pboes, 

 under chapters II. III. VII and VIII. thoae of ticks in chapters 11. 

 Ill, IX and X. Any ooe who wishes to use this book to learn what 

 are all the effects upon Innaan beings p ro du ced by any one group of 

 Art h ropods mast have rceoarse to tfie Index and this we have found 

 i n com p le t e. Thus, to the entries for "moaqnitoes" dioald be added 

 pages 186 and apt. to those for "ticks" pages 6a, m and 930^ osentioo- 

 ing only the faKldng references to the fvst pages of sections or chap- 

 ters concerned, wi th o u t attempting to supply a reference to every page 

 on which the word "mosquito" or *Hick" happens to occur. 



The title of the book naturally suggests that of another, recently 

 pablished m English : Patton k Cragg's "Textbook of Medical Ento- 

 mology," noticed in the Niwa for July, 1914, pages 133-334. In the lat- 

 ter voliuae the arrangement is entomological throughout, the various 

 remits dae to die Interaction of Arthropods and Man being db- 

 cassed in con n ection with each taxonomic group. 



Riley and Johannsen's Handbook is a much smaller book than that 

 of their Anglo-Indian predecessors, as the American authors give no. 

 or very brief, deecriptkms of die structure of the Arthropods with 

 which they are c on cer ned, assaming, no doubt, that those who will 



