182 
Psyche 
[June 
12. Calypters yellow with yellowish cilia, halteres dark yellow, 
sometimes yellowish brown. 
Wings dark grayish; cross-vein a little clouded; third vein 
only a little bent back towards the tip, nearly parallel with 
fourth; last section of fifth vein 14, cross-vein 19 fiftieths of a 
millimeter. 
Female: Length 2. 5-3. 2 mm; of wing 3.5-4 mm. Face 
with grayish pollen, its lower portion about as long as wide, 
evenly rounded on oral edge. Fore coxae with two very small 
black spines at base ( I cannot see these in the male). Femora 
with about eight irregularly placed short spines on lower surface 
of basal half and several longer ones, they also have the same 
long pale hairs as are found in the male, but they are a little 
shorter. The wings are about the same as in the male, except 
that in two of the females there is no cloud on the cross-vein 
and the wings are more clear. 
Described from two males and three females, all taken at 
Awene, Manitoba, October 7, 1924, by N. Criddle, after whom 
I take pleasure in naming this interesting species. 
Hydrophorus fulvidorsum sp. nov. 
Male: Length 4.2 mm. Face wide, only slightly narrowed 
above, brownish gray, wholly opaque, the lower portion not as 
long as wide, a very little pointed in the center. Front opaque 
brown. Antennae black (only the first joint present on the type). 
Occiput green with brown pollen. Cheeks narrow. A row of 
bristles extend each way from the postverticals, joining the or- 
bitals rather far down; the black orbital cilia extend down to 
the middle of the eye; beard white, not very abundant, there 
are a few black bristles under the neck. 
Thorax green, covered with thick brown pollen, the poster'or 
part and the scutellum more shining; humeri with gray pollen; 
pleurae nearly opaque with brown pollen, which appears more 
gray when viewed from below; scutellum with one pair of mar- 
ginal bristles; I can see no acrostichal bristles in the anterior 
half of the dorsum (in the type the posterior half is injured by 
the pin); propleurae with a cluster of long pale hairs above each 
