I 
April, ’20] OBITUARY 263 
assembled in either of the sister commonwealths, to discuss practical 
matters relating to our insects, birds and mammals. At the same time 
he unceasingly encouraged amateurs, collectors and students to amass 
data and collections for the purpose of gaining a more satisfactory 
knowledge of the fauna of British America. 
Those who were privileged to know Dr. Hewitt intimately, in the 
few leisure hours he could spare from his many strenuous and exacting 
duties, found in him an affectionate and considerate friend and, owing 
to his intense interest in good literature, music and painting, a very 
stimulating companion. There was another side of his nature that 
was not revealed to his friends in the United States as it related to his 
immediate home environment. This was his ardent interest in the 
education of boys. He was active in the Boy Scout movement and 
was president of the Ottawa Boys’ Club, which made great progress 
while he was connected with it. 
The great esteem in which Dr. Hewitt was held by his fellow scien¬ 
tists, both in the Dominion and in the United States, is shown by the 
fact that he was elected a Fellow of the Royal Society of Canada in 
1913 and its honorary treasurer in 1914; that he was a member of the 
Canadian Wild Life Board, and had held presidential positions in 
three of the leading entomological societies: The Entomological 
Society of Ontario, the American Association of Economic Entomolo¬ 
gists and the Entomological Society of America. He published a 
number of valuable entomological papers and addresses and had com¬ 
pleted a book on the conservation of the wild life of Canada, a subject 
to which he had devoted much attention during the past few years. 
That he should have been stricken by pneumonia in the very begin¬ 
ning of what promised to be a long and brilliant career of service, both 
to his adopted country and to the United States, can only be attributed 
by his friends to overwork during and since the World War. 
W. M. Wheeler. 
Reviews 
An Investigation of the Louse Problem, by William Moore and 
Arthur Douglass Hirschfelder. Research Publications, Vol. 
VIII, No. 4 (Studies in the Biological Sciences, No. 3). Uni¬ 
versity of Minnesota, Minneapolis, Minn., July, 1919. 
This pamphlet of 86 pages describes the methods of rearing lice, with notes on their 
biology, pathological effects of their bites, methods of control, the preparation of 
certain compounds used in the experiments, and bibliography. It is illustrated by 
six charts showing curves, and two figures. Valuable data are here recorded on the 
incubation period of eggs, length of instars, and the influence of temperature on egg 
production. A major portion of the paper deals with control methods, such as laun¬ 
dry processes, effect of hot water, dry heat, soap suds, fumigation, louse powders, 
