In the course of a series of dissections of various species of Pieridae, the author noticed what appeared tobe a costal vein in the forewing of a specimen of Archonias bellona Cramer. Further examination showed that there was indeed a costal vein present here, and this prompted a scrutiny of a considerable body of material in this ganus and others allied to it, the results of which are given in tabular form below.

Form elongate, moderately slender, sides of body parallel, three times as long as wide. Color usually nigro-piceous, at times more or less rufo-piceous ; prothorax varying from rufo-testaceous to rufo-piceous; palpi, antennae and legs rufo-testaceous, at times clouded with fuscus. Luster more or less shining throughout. In palerspecimens a rather broad, black transverse fascia is more or less distinct just behind the middle third of the elytra, this extends along the suture to base, gradually widening- in basal third to involve the inner one-halfof each elytron and scutellum: when the elytra are more or less rufotestaceous the apical area remains piceous and when entirely nigro-piceous the maculation may be more or less defined by brownish hairs. Pubescence for the most part pale throughout, decumbent, of moderate length, not coarse and not concealing the surface; beneath more closely recumbent, denser on the apical margins of abdominal segments and mesosternal parapleura; shorter, finer and closely appressed on the legs. Head and pronotum with quite long, bristling, sparsely scattered setiform hairs; those of the elytra semierect and of moderate length.

The dark or grayish bodied horseflies, superficially resembling Tabanus rhombicus O. S. or its variety osburni Hine, are among the abundant and trouble some species encountered in western and boreal North America. Four new species and the previously undescribed males of 6 others, together with a rather widely scattered literature have suggested the value of bringing together some notes on this rather heterogeneous group. Most of the species have 3 rows of pale markings on the abdomen, but a few are black with little or no indication of pattern; all here included have been placed in the subgenus Therioplectes, with hairy eyes in both sexes and an ocelligerous tubercle in the females. The numbers of specimens actually seen by me from various western states are included.

Preliminary study of the outbreak of the European spruce sawfly (Diprion polytomum Htg.) in the Gaspe Peninsula, undertaken in 1931 by the Division of Forest Insects, showed that the extent of the infestation was such that the sawfly could not be economically controlled by chemical or mechanical means. It was found, also, that the sawfly was not attacked by parasites.