jo; 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 yellow, 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. 



