120 The Ottawa Naturalist. [Dec. 



Bartramian Sandpiper Breeds near Guelph, by Herbert Groh; 

 The Flora of the Sand Dunes of Prince Edward Count v, by 

 A. B. Klugh; Food Habits of the Bullfrog, by E. W. Calvert"; 

 The Edible Toadstools The Smooth Lepiota, by W. A. McCub- 

 bin; Weed Migration, by F. Mitchell; An Addition to the List 

 of Toronto Butterflies, by Arthur Gibson, and Notes on the 

 Mammals of the Bruce Peninsula, by A. B. Klugh. A. G. 



House-flies and How They Spread Disease. By C. 

 Gordon Hewitt, D.Sc, Dominion Entomologist. Cambridge; at 

 The University Press, 1912. Price Is. net. New York Agents: 

 G. P. Putnam & Sons, 2-6 West 45 St., New York. 



This volume of 122 pages, one of the series of the Cambridge 

 Manuals of Science and Literature, has recently appeared. It 

 is replete with concise, accurate facts concerning the subject 

 of house-flies and disease, a subject which every day is becoming 

 of more vital interest to every wide-awake citizen who values 

 the health of the community in which he resides. There is 

 no more deadly and rightly much abused insect than the house fly, 

 and such reliable information as is contained in this volume will 

 do much towards making wider and better known the habits of 

 this "potential disease-carrier and constant frequenter of filth." 



The volume is divided into two parts. Part I The Natural 

 History of the House-fly, contains six chapters : I Introduction ; 

 II The Structure of the Fly; III The Life-history and Breed- 

 ing Habits of the House-fly; IV The Habits of the House-fly, 

 V Other species of flies found in houses : The Lesser House-flv ; 

 The Latrine-fly, The Stable-fly, The Blow-fly or Blue-bottle, 

 The Cluster-fly, and Muscina stabulans (which has not yet 

 received a popular name); VI The Parasites and Natural 

 Enemies of the House-fly: Empusa musca, Chelifers, mites borne 

 by the House-fly, Thread-worm parasites, Protozoal parasites, 

 and Insect Enemies. Part II. The Relation of House-flies to 

 Disease, embraces chapters VII to XL Chapter VII deals with 

 The Carriage and Distribution of Micro-organisms of Flies; 

 VIII The Dissemination of Typhoid Fever by Flies and their 

 Relation to Summer Diarrhoea; IX The Relation of Flies to 

 certain other Infectious Diseases: Tuberculosis, Ophthalmia, 

 Cholera, Plague, etc.; X House-flies in relation to (1) Myasis 

 of the Intestinal and Urinal tracts, and (2) The Spread of Para- 

 sitic Worms; XI Preventives and Control Measures. 



In the text there are 19 illustrations, the author being 

 responsible for all with the exception of two. The general 

 appearance, the printing and the paper used in this manual are 

 all excellent, and what will please the lay mind , there is a total 

 absence of all technical terms. CVGlCil/X. ^" ^' 



