312 THE CANADIAN ENTOMOLOGIST 



between them ; halteres with black knob ; calypters yellow. Abdo- 

 men ovate, above with somewhat changeable pollen with a rather 

 bluish cast, showing' an indistinct median black stripe. Legs 

 black, front femora with the usual two teeth below near tip, the 

 outer bearing four small spines on its outer side, with which several 

 longer bristles near the base form a widely interrupted row; front 

 tibia without bristles except at apex; middle femur with long, 

 soft hairs on front and hind sides, a few more bristle-like in front 

 on basal half, middle tibia with no bristles on outer front side in 

 one specimen, in the other with one very small, and in both with 

 two behind; hind femur on outer side with complete upper and 

 lower rows of bristles, both nearly horizontal, and numerous hairs 

 below on inner side, some of which beyond middle are bristly; 

 hind tibia with one long bristle behind below middle, a complete 

 row of cilia on outer hind side including one bristle below the 

 middle, a row of cilia on apical half of outer front side, and on 

 inner front side for the middle third a loose row of erect, slender 

 hairs of which the uppermost are one-half longer than the thick- 

 ness of the tibia; at the tip of the hind tibia on the inner side is 

 a row of a dozen close-set little spines forming a small comb, 

 which stands in a diagonal position. Tarsi of ordinary form, 

 the pulvilli not much elongated. Wing brownish, narrow, third 

 and fourth veins a little convergent, last section of fourth more 

 than twice the preceding. 



Length 6 mm. 

 Female unknown. 



Two males: the type is from Lafayette, Ind., June 20, 1916; 

 paratype Moscow, Idaho, June 19, 1910, taken on parsnip flowers. 

 Both collected by the writer. The type will be deposited in the 

 National Museum. 



In Malloch's table the species runs to couplet 10, and of the 

 remaining species is nearest related to hispinosa Zett., which, how- 

 ever, has a strong bristle on outer front side of middle tibia, and 

 lacks the peculiar hairs on the inner front side of the hind tibia. 



Hydrotaea comata, n. sp. 

 Male. — Deep black, subshining, abdomen only faintly pollin- 

 ose. Eyes bare, separated at middle of front by about the dis- 



