THE CANADIAN ENTOMOLOGIST. 167 



teachers. The admitted purpose of the book prevents us from 

 making certain criticisms that we might otherwise feel disposed 

 * to offer regarding the treatment of the subject. As a work of 

 reference for the entomologist and sanitarian who is not a specialist 

 on the subject, the book will prove to be very useful, as it contains 

 the kind of information not hitherto collected in so convenient a 

 form by previous treatises on the subject. The contents are made 

 easily accessible by a full index. 



In treating the various groups of insects and diseases, the 

 authors summarise the historical facts and experimental work, 

 and describe the diseases, the methods of transmission and eradica- 

 tive measures, thus presenting in a convenient form the essentials 

 of the subject. A fairly extensive bibliography enables the student, 

 if he has access to the literature, to pursue the subject further, 

 should he wish to do so, although the memoirs of the authors 

 quoted are not always given in the bibliography, which is only 

 intended as an avenue to the more specialized fields. 



The authors are inclined, we think, to assume from time to 

 time too great a knowledge of medical terminology on the part of 

 the non-medical student or reader; a difihculty that might be 

 obviated by means of a glossary. 



While the book deals with species from all countries and will 

 therefore be of use to a wider constituency than that of North 

 America, in the selection of typical forms the choice has naturally 

 been made from those occurring on this continent. The synoptic 

 tables given at the end of the book, together with the figures, will 

 prove of great assistance to students, as also the notes given from 

 time to time in regard to securing material. The illustrations 

 also greatly add to the value of the book as they are representative 

 in character. 



The omission on page 216 of the name of Bruce in connection 

 with the origin of the idea that the Sleeping Sickness trypanosome 

 is carried by Glossma palpalis should be corrected, for to him 

 belongs the chief credit of this discovery. On page 215 "Bugosa" 

 should be Busoga. The authors are to be congratulated on having 

 a publisher who not only produces a well-printed book, but enables 

 them to include in the text an abstract of a paper published in the 

 month previous to the publication of their book! It is a book 



