1922] Cumin: Ilammcrschmidtia and Brachypoda 245 



black, with the hind margins gra3ash yellow pollinose, the pollen 

 extending forward in the middle to the anterior third, but there is a 

 roundish notch centrally in front, corresponding to the median stripe on 

 the second segment. Hypopygium yellowish red. Abdomen with light 

 yellow pile, longer basally Legs black, anterior four trochanters, tips of 

 the femora, the anterior ones beneath apically, basal third of tibiae, tips 

 of the tibiae and tips of the tarsal joints, luteous or yellow. Wings 

 slightly yellowish anteriorly, the veins all a little crowded, the region 

 of the anterior cross vein and a streak between the spurious vein and 

 the fourth vein beyond the cross-vein, brownish; wing"? more yellowish 

 basally. 



Female. Front golden ^^ellow pollinose, leaving the ocelli and a 

 streak in front shining black, a large area above the antennae, cut off 

 truncately above, and the face below, on the sides, shining yellowish, 

 although the lower part of the face is slightly pubescent. The pollen on 

 the thorax and abdomen is more yellow; fifth abdominal segment 

 yellow pollinose, except an anterior broadly interrupted cross-band; 

 third antennal joint broader, a little darker. 



Description drawn from 9 specimens, taken at Orillia on 

 May 5th to 18th, 1921. 



This species is easily distinguished from the preceding by 

 the less pollinose abdomen, as the anterior half of the median 

 segments is wholly shining, whereas in cynops there are very 

 distinct oval shining spots on the anterior angles, the balance 

 of the segment being shining. 



Brachyopa vacua O. S. 



Abdomen with the second segment pallidly yellowish, the apical 

 segments shining blackish. 



Length, 7 to 9 mm. Male. Face and front of a dirty yellowish color, 

 clothed with whitish pollen, which leaves a brown stripe on the cheeks 

 and an area above the antennae shining. Antenna; colored as the face, 

 arista black, and almost bare. Vertical triangle long, the eyes touching 

 for only a short distance, a distinct median groove in front of the ocellar 

 triangle, which is brownish; occiput with grayish pollen and head with 

 entirely pale pile. Dorsum of thorax obscured by grayish yellow pollen, 

 which leaves the usual double median stripe, an interrupted stripe on 

 each side and a spot above the wings, brownish. The pleurae are fer- 

 ruginous, the sternum blackish, but thickly whitish pollinose. Pile of 

 thorax yellowish on the dorsum, whitish on pleurae. Scutellum luteous 

 yellow, subtranslucent, squarish, with short, white pile. First abdom- 

 inal segment brown, the anterior angles ^^ellowish, the whole whitish 

 pollinose; second segment except the apical sixth, the lateral margin 

 posteriorly and a median dash, usually not reaching the black posterior 

 border, shining yellowish. The rest of the abdomen, except the small 

 anterior angles of the third segment, which are yellowish, shining 

 brownish black. Pile wholly white. Legs brownish, the femora thinly 



