80 c Canadian Arctic Expedition, 1913-18 
bristle on dorsal surface near apex. Inner cross-vein distinctly beyond apex of 
first vein and at three-sevenths from apex of discal cell; penultimate section of 
fourth vein about half as long as ultimate section. 
Length, 4-5 mm. 
Type Locality: Collinson point, Alaska, June 20, 1914 (F. Johansen). 
AUomyia, n. gen. 
I described this genus in a paper, which was completed some time ago, on 
Pribilof Island Diptera, but it will not go to press until after this paper. I had in 
that collection the female only. The generic synopsis in this paper and the 
following description may be accepted as embodying characters of the genus, 
though it is possible that the furcate processes of the fifth abdominal sternite are 
not present in the male of the other species. 
AUomyia unguiculata, n. sp. 
Male.- — Black, thorax and abdomen greyish pruinose. Head brownish, 
black, anterior portion of frons, lower half of face, and anterior part of cheeks 
yellowish; antennae black; palpi yellow; proboscis black. Legs black, tibiae 
brownish, yellow at bases, tarsi brown. Wings clear. 
Orbital bristles rather weak; antennae large, third joint about twice as long 
as second, subangulate at apex on upper side (PL X, fig. 37) ; arista bare, tapered 
on basal third of apical joint; cheek about one- fourth the ej^e-height. Dorsum 
of thorax with five well-developed dorso-centrals; scutellum with short discal 
hairs and four strong marginal bristles; pteropleura with hairs on centre; sterno- 
pleura with long hairs and one strong bristle. Abdomen subcylindrical, narrow, 
fifth sternite with a large bifid plate on each side (PI. X, fig. 38), hypopygium 
small (PI. X, fig. 36). Legs as in Dasypleuron, but the fore tibiae with short 
ventral spines; tibiae with the bristles as follows — fore tibia with one antero- 
dorsal and one to two posterior, mid tibia with one antero-dorsal, one postero- 
dorsal, and one posterior, hind tibia with two antero-ventral near apex, two 
antero-dorsal, and one postero-dorsal. Inner cross-vein well beyond apex of 
first and at less than two-fifths from apex of discal cell. 
Length, 3-5 mm. 
Type locality: Chantr}- island, Bernard harbour. Dolphin and Union 
strait, Northwest Territories, June 17, 1916 (F. Johansen). 
This specimen was in very poor condition, and in order to get the structures 
into condition for examination I had to boil- it. Originally pinned, it is now 
preserved in alcohol, in a fragmentary condition. 
The foregoing species differs from the genotype in the colour of head and 
legs, in having the palpi narrower, and the wings longer and with thinner veins. 
Ernoneura Becker. 
This genus has only once previously been recorded from the western hemis- 
phere. There is only one species of the genus, which was originally described 
by Zetterstedt from the European arctics. 
Ernoneura argus Zetterstedt. 
Represented by five specimens taken at Bernard harbour. Dolphin and 
Union strait. Northwest Territories, three specimens, July 19, 1915, and two 
specimens, July, 1916. 
Becker states that there is no sternopleural bristle present, but it is well 
developed in the specimens before me. 
