882 S. W. Williston — North American Conopidoi. 



Zodion nanellum, Loew. 



Translation. "?. Length, 2f""". Very small, black-cinereous. 

 Occiput blackish ; front orange colored, near the vertex fuscous ; 

 antennae fuscous, on the sides, except the tip, rufous ; face and cheeks 

 dilutely yellowish, the latter narrower, the eyes proportionally 

 larger than in other species; thorax black-cinereous, pleurae a little 

 lighter; dorsal stripes black, narrowly interrupted, abbreviated at 

 both ends. First four abdominal segments above black, opaque, the 

 posterior margins very narrowly, the sides broadly, cinereous 

 pollinose ; fifth segment very short, fusco-testaceous ; sixth segment 

 testaceous, lightly pollinose, sub-shining; seventh segment wholly 

 destitute of pollen, shining, testaceous, the tip, however, black ; 

 ventral valve rather large. Legs sub-fuscous ; coxae, tip of the 

 femora and base of tibia? pallid reddish. Halteros white. Wings 

 cinereous-hyaline, veins black." 



Hab. District of Columbia (Lw.). 



This species must resemble Z. pygmmum, but difiers in the greater 

 extent of the opaque black on the dorsum of the abdomen. 



MYOPA. 



Rather large to rather small species. Head large, swollen. 

 Antennae of moderate length, the second and third joints of nearly 

 equal length, the third joint oval. Face very large, cheeks very 

 broad, at least as broad as the vertical diameter of the eyes. Pro- 

 boscis always with a hinge near its middle, the terminal portion 

 folding backward. Front broad, produced somewhat conically for 

 the antennas. Thorax short ; scutellum semioval. Abdomen short, 

 depressed, oval, the terminal part always curved downward and 

 inward, the ovipositoi- not elongated. Legs rather stout, the hind 

 femora scarcely elongated. First posterior cell of wings sometimes 

 closed, the anal cell acute, extending toward the border of the 

 wing. 



Myopa pictipennis, n. sp. 



? . Length, 8""". Face and cheeks yellowish white, on each side 

 of the face in front with some small, black spots (probably some- 

 what variable) ; above them, in front of the lower part of the 

 eve, another blackish spot, separated from the blackish color above 

 the base of the antennae, which extends outward to the orbit ; lower 

 part of the occiput on the sides much inflated ; cheeks with :i fringe 



