PIPUXCULIDvE. 93 



Femora irregularly thickened toward the base, the tibiae with irregular 

 outlines ; small cross-vein of wings near the outer third of discal cell. 



PHYSOCEPIIALA Schiner. 



4. Proboscis directed forward, not bent near the middle. ZODION Latreille. 

 Proboscis bent near the middle, the distal part folding back. . 5 



5. Vertex with bristles ; tibiae spurred ; face carinate, not grooved ; ovipos- 



itor of female very long. . > . . STYLOGASTER Mac-quart. 

 Vertex and tibiae without bristles; face with ^-shaped groove. . 6 



6. Anal cell short; ovipositor elongate and folded beneath the abdomen. 



DALMANNIA Robineau-Desvoidy. 

 Anal cell elongate, acute. .' - f . . . . .". . 7 



7. Cheeks not as broad as the vertical diameter of the eye. 



OKCOMYIA Robineau-Desvoidy. 

 Cheeks as broad or broader than the vertical diameter of the eye. 



MYOPA Fabricius. 



30. PIPUXCULIIXE. 



Small, thinly pilose or nearly bare flies. Head nearly spher- 

 ical, broader than the thorax, chiefly composed of the large 

 eyes. Eyes in the male contiguous above, separated by the 

 narrow front in the female. Face narrow. Antennae small, 

 short, three-jointed, the third joint oval or reniform, with a 

 dorsal arista, often with a more or less elongated pointed pro- 

 cess on the under side. Ocelli present. Proboscis small, 

 concealed. Abdomen composed of six or seven segments, 

 small, cylindrical ; hypopygium thickened, more or less club- 

 shaped; ovipositor usually elongate and folded under the 

 abdomen. Legs simple; metatarsi elongated, tarsi broad, 

 tibiae without spurs ; pulvilli present. Tegulae rudimentary. 

 Wings much longer than the abdomen ; third longitudinal 

 vein not furcate ; basal cells well developed, the anal cell 

 elongate, reaching to, or nearly to, the margin ; first posterior 

 cell narrowed in the margin ; three posterior cells present ; 

 discal cell present in the known American species. 



The flies of this small family are most commonly met with 

 on flowers or in sweepings, and are readily distinguished by 



