3° 
The Ohio Naturalist. 
[Vol. VII, No. 2, 
The second, third and fourth segments of the abdomen each with 
a golden yellow annulus at its apex. 
Front and face rather narrow, the latter covered with golden 
yellow pollen between the callosity and the antennae, callosity 
slightly elevated, mystax black, beard white, third segment of the 
antenna about as long as the other two together, style shorter than 
the remainder of the segment; thorax dark in ground color, 
clothed with pollen which is denser in some places than in others, 
middorsal stripe opaque black, narrowly divided on the anterior 
part; scutellum with several black bristles at its apex; wing uni¬ 
formly pale brown all over with a slight intensity of coloration 
on the margin of the second vein near the middle of its length. 
Legs black and vellow, a preapical ring on each femur, all the 
tibiae except at apexes and bases of the tarsal segments yellow, 
other parts black; hind femora somewhat variable in that the 
yellow is likely to increase at the expense of the black; halteres 
yellow. Abdomen shining blue-black, second, third and fourth 
segments each with a golden yellow annulus at apex not preceded 
by a row of bristles; eighth segment below not widened but fur¬ 
nished with a conspicuous tuft of erect hair. Genitalia of both 
sexes shining black, of the male somewhat wider than the 
abdomen when viewed from above and about as long as the 
seventh and eighth segments combined. Length 14-17 mm. 
Several specimens of both sexes taken in the Hope Mountains 
of British Columbia by R. V. Harvey and R. S. Sherman of 
Vancouver, during the first part of July. 
