G8 c Canadian Arctic Expedition, 1913-lS 
Pogonomyia quadridetosa; antennae short, third joint less than twice as long 
as second; arista bare, second joint as long as thick, third swollen for about 
one-third of its length; cheek about one-fourth as high as eye, densely haired 
on lower half, the bristly hairs almost uniform in length and strength, vibrissa 
well differentiated; palpi slender, nearly as long as apical portion of proboscis. 
Dorsum of thorax not very conspicuously hairy; presutural acrostichals weak, 
irregularly four-rowed; postsutural dorso-centrals four, prealar bristle very 
small; a group of numerous bristly hairs above fore coxae; sternopleura with 
very long hairs and two strong bristles, one in front and the other behind . 
Abdomen with short bristly hairs and no long bristles. Legs similar to those of 
Pogonomyia in form; fore coxae without stout bristles; fore tibia with two to 
three weak posterior bristles, apical spines short ventrally; mid femora with a 
few weak bristles on basal half of antero-ventral surface; mid tibia with two 
to three antero-ventral, two to four antero-dorsal, four to six postero-dorsal, 
and two to three postero-ventral bristles on surface; hind femora with rather 
weak bristles on greater portion of antero-ventral surface; hind tibia with 
three to four antero-ventral, three to five antero-dorsal, and six to eight postero- 
dorsal bristles, none of which are very long; mid and hind tarsi with short, 
rather closely placed bristles. Costal thorn indistinct; outer cross- vein straight; 
last section of fourth vein about 1 • 75 as long as preceding section. 
Length, 7 mm. 
Type locality: Bernard harbour, Dolphin and Union strait, Northwest 
Territories, July 7, 1915 (F. Johansen). 
I have seen a series of specimens of this species from the arctic region in 
another collection, and find that the pteropleural hairs are rarely absent. The 
characterization here given holds good throughout the series. 
COENOSIIN^. 
There are two imagines of this sub-family in the collection. Both belong 
to the genus Coenosia and represent different species, but only one is in good 
enough condition to permit of its identification. 
Coenosia octomaculata Zetterstedt. 
Coenosia octomaculata Zetterstedt. Ins. Lapp., p. 141, 1840. 
This northern European species has not hitherto been rcorded from this 
continent. Although very closely resembling geniculata Fallen, it is very 
readily separated from it by the much smaller lower squama, which barely 
projects beyond the upper. In the specimen before me the mid tibiae have the 
antero-dorsal and postero-dorsal bristles at the same height, whereas in my 
specimens of genicidata from Illinois the antero-dorsal one is much nearer apex 
of tibia. 
Locality: Nome, Alaska, August 24 and 25, 191G (F. Johansen). 
Coenosia, sp. 
One female in very poor condition. The legs appear to be black or fuscous, 
with only the bases of the tibiae pale. 
Locality: Bernard harbour. Dolphin and Union strait, Northwest Terri- 
tories, July 10, 1915 (F. Johansen). 
ANTHOMYIINiE. 
There is one genus in this collection which has been previously known from 
arctic Europe only, and another has been listed as belonging to Anthomyia. In 
