riPuxcuLiD.T:. 93 



Foiuora irregularly thickened toward tlie base, the tibiae witli 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 



o. Vertex with Itristles; tibiiP spurred ; face carinate, not grooved; ovipos- 

 itor of female very long. . . . Styi.ogastkr Macquart. 

 Vertex and tibicc without bristles; face with ^\^-shaped groove. . <» 



0. Anal cell sliort; ovipositor elongate and folded beneath the abdomen. 



I) A LM ANN I A liobincau-Desvoidy. 

 Anal cell elongate, acute. .... .... 7 



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



< )NroMYiA Robineau-Desvoidy. 

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



Mvoi'A Fabricius. 



30. PIPUNCULID.E. 



Small, thinly pilose or neavly Ijare flies. Head nearly spher- 

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

 eyes. Eyes in the male contigtioiis a])ove, 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 ])ointed i)ro- 

 cess on the nnder side. Ocelli jjresent. Proboscis small, 

 concealed. Abdomen composed of six or seven segments, 

 small, cylindrical ; hypo})ygiitm thickened, more or less club- 

 shaped ; ovipositor usiiall}^ elongate and folded under the 

 abdomen. Legs sim[)le; metatarsi elongated, tarsi broad, 

 tibia' without spurs; pulvilli present. Tegida; rudimenttiry. 

 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 postei'ior 

 cell narrowed in the margin; three ])ostei-ior cells jiresent; 

 dis(;al cell present in the known American species. 



The flies of this snudl family arc most commoidy met with 

 on Howcrs or in s\vee]iings. and ai'e readily distinguished by 



