The work on the production of Trichogramma minutum Riley was instituted at the Chatham lahratory in January, 1928. What has been done to date has been largely of a preliminary nature but we feel justified in describing the methods being used because of the very general and widespread interest in this insect at the present time.

I take pleasure in naming this species and an hereinafter to be described species of Saprinus after Prof. H. E. Jaques of the Iowa Wesleyan College. The present paper is the result of the studies necessitated hy the specimens of Histeridae sent to me by Prof. Jaques for determination. The types of all the new species and abberrations are in the collection of the author.

Dr. Herbert F. Schwarz has recently considered the relationship of Anthidium collectum Huard and A. angelarum Titus. After a study of the facts at hand, he says: “I think tliere can be little doubt that the insects represent one species to which the name collectum applies by virtue of priority.” From a review of the literature there seems to be no record of the nesting habits of this bee.

Length 6-7.2 mm.; width 3.6-4.2 mm. Broadly oval ; black, opaque above except as noted below, ventral surface and legs shining; pronotum and elytra with short, sparse, pale setae; venter with a few hairs. Head slightly more than half as wide as pronotum; genae not prominent.

Many new species of the genus Hylemyia Rob.-Desv. are herewith described as a result of a study of Canadian Muscidae in the National Collection at Ottawa. This family is represented by a large number of specimens in the collection, and by a representative number of species belonging to the Canadian zone. No doubt the number will be doubled within the next few years as collecting progresses.