At the time when the Entomological Society of Canada was founded, 88 years ago, the science of entomology was almost synonymous with systematics. I say almost synonymous, because important advances in the study of insect development and behaviour had already occurred and even economic entomology, which now absorbs nine-tenths of our professional effort, was already showing signs of growth. Nevertheless, the great names in entomology were still those of the systematists. The work of description and classification was still the most absorbing interest in the entomological field.

In this paper two new species of Chimarra (Philoptamidae) and five new species of Hydropsychidae are described. The majority of the new species are from western United States. Grateful acknowledgment is made to Dr. R. H. Beamer of the University of Kansas for sending me many of the specimens used in this paper. Unless otherwise designated types of the new species are in the collection of the author.

Interest in the Canadian north has increased greatly during recent years because of its importance in national defence, and the actual and potential value of its natural resources. A serious hindrance to northern development is the presence during the short summer season of great numbers of blood-sucking flies that make liie difficult for man and beast. The major pem in the forested subarctic are mosquitoes, black flies, and tabanids (the so-called deer flies and moose flies); beyond the tree-line on the arctic tundra black flies are much less troublesome and tabanids do not occur, but in many regions mosquitoes are a terrible scourge.

In revising the genus Triaspis Haliday, as found in North America north of Mexico, the author studied an undescribed species from Mexico. This form is a parasite of Apion godmani Wagner, a weevil of economic importance. This paper provides a name and a description for this new parasite.

The author is most grateful to Dr. V. S. L. Pate of Cornell University for his helpful criticism of the manuscript, and also to Mr. C. F. W. Muesebeck of the U.S. National Museum for the loan of material, and to Dr. Arthur C. Smith of Cornell University for the specimens collected while he was studying the biology of the host in Mexico.