26 DECEMBER 1914, Page 26

Dr. C. Gordon Hewitt, the Dominion Entomologist of Canada, has

written an exhaustive monograph on that almost ubiquitous pest The House-Fly (Cambridge University Press, 15s. net). The general reader will take most interest in the last two sections, respectively explaining the large part played by house-flies in disseminating enteric fever and other diseases, and stating the measures which should be taken to diminish their numbers. The best method, of course, is to prevent their breeding by destroying the refuse and garbage in which they lay their eggs.—A wider field of the same nature is covered by Professor Glenn W. Herrick, of Cornell University, in his clear and popular account of Insects Injurious to the Household and Annoying to Man (Macmillan and Co., 7s. 6d. net).