1916] Synopses of Zodion and Myopa 199 



Bigot's Species. 

 G. rubida. 



Agrees with a form of Myopa conimon in the West which is 

 close to M. clausa, but with a shorter proboscis. I have it 

 from Oregon and Washington. 

 G. maculijrons. 



This is probably Myopa vesiculosa which also occurs in the 

 West. The only objection is that Bigot says the hair of thorax 

 is brown (he does not say black). 

 G. castanea. 



Is larger than his other species; the red abdomen, black 

 above, would indicate that it is plebeia Will., which agrees also in 

 other characters. Von Roeder's statement that it is Myopa 

 clausa is based on the idea that the closed cell is a specific 

 character. 



Occemyia abbreviata Lw. 



The abdomen of both male and female slightly clavate, 

 whitish on the posterior sides of second segment ; hair black; in 

 the female the ventral plate is very broad, low, and dark colored. 

 Hind femora are often pale on basal half, black on apical half. 

 The pollinose marks of abdomen are whitish. The size varies, 

 and three specimens are as small as the smallest O. loraria. 



Occemyia loraria Lw. 



In the male the abdomen is more elongate and cylindric 

 than in 0. abbreviata; the pollinose marks more yellowish, the 

 hair also yellowish. In the female the ventral plate is narrow, 

 and mostly pale colored. The size varies, and some specimens 

 are as large as the largest 0. abbreviata. From Oregon (Cor- 

 vallis) I have seen specimens that I cannot distinguish from the 

 Eastern ones. 



Dalmannia pacifica n. sp. 



Face pale ; in the male a large elongate dark spot each side just out- 

 side of the facial ridges, in female wholly yellowish; vertex and front 

 black; thorax shining black, the humeri and scutellum yellow. Abdomen 

 mostly yellowish above and below; first segment black, with a pale 

 band at base and apex broadly pale; segments two and three yellow, 

 with four separated (or barely connected) black spots across base, the 

 lateral spots reaching the side margins; fourth segment yellow, with a 

 black spot on each side, in the female the fifth segment has a pair of 

 black stripes, united behind, and the ovipositor black; venter with a 

 middle black spot on first segment; legs yellow, tarsi black; front and 



