

THE CANADIAN ENTOMOLOGIST. 11 



Tropidomyia, gen. nov. 



Face, in profile, vertical and straight, with a median sharp ridge, on 

 the sides plane or gently concave, wholly without grooves or lateral ridges. 

 In front view, the face shows, below, a sharp triangular notch, rising a 

 little above the lower border of the eyes, from the apex of which the 

 sharp carina runs to the base of the antennae. Wings narrow ; anterior 

 cross-vein near middle of discal cell, and opposite the termination of the 

 auxiliary vein ; termination of second vein remote from that of the first, 

 the interval as great as that between the terminations of the second and 

 third veins. 



The above are the most essential characters, readily distinguishing this 

 genus from Conops. Other characters that may or may not be of generic 

 value are the following : Third joint of antennae very short, scarcely 

 longer than wide, shorter than the first, the latter about one-third or two- 

 fifths the length of the second. Posterior cross-vein straight, and rec- 

 tangular to both the fourth and the fifth veins. Second segment of the 

 abdomen in the male very slender, somewhat broader in front, nearly as 

 long as the three following segments together ; in the female the second 

 segment is cylindrical, but less slender than in the male, only a little 

 longer than the third, the sixth segment as long as the three preceding 

 together, the fifth with a large process below. Proboscis as long as the 

 hind femora. The legs and front, and general structure otherwise, are like 

 those of Conops, sens. str. ; the wings with their narrow cells present a 

 very different appearance, however. The carinate, non-grooved structure 

 of the face differs from that of all the other genera of Conopidae save 

 Stylogaster, a species of which (S. stylatus Fabr., which is distinct from 

 both the North American species) was found in the same region with the 

 present species. 



Tropidomyia bimaculata, n. sp. 



$ , %. Face with a silvery, or slightly yellowish, sheen, showing the 

 black ground-color in different reflections ; a slender median black line on 

 the carina. Vertical callosity yellowish red below, obscurely blackish 

 and luteous, save the narrow margins, which are more yellow ; close to 

 the eyes below, a circular opaque black spot. Antennae brownish red, 

 the third joint red ; style short, conical, but little longer than the lateral 

 projection. Thorax opaque black, thinly pollinose on the sides, a slender 



