260 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.46. 



lateral stripes; on the extremity of the middle stripe anteriorly there 

 is a black spot while the lateral stripes are blackened at apices ante- 

 riorly and slightly on the small roimded portion behind humeri; there 

 is also an elongate black spot in front of wing base; pleurae %vith a 

 glossy black spot on lower portion of the mesopleura and another 

 more obscure one on above hind coxa; scuteUum yellow, with rarely 

 a blackened area on disk. Abdomen yellow, with either narrow, fore- 

 margina], tridentate black bands, or three longitudinal rows of spots. 

 Legs with tarsi sometimes browned at apices. Wings clear, veins 

 yellow. Halteres yellow. Hairs yeUow, bristles black. 



Frons occupying one-half the width of head; triangle poorly de- 

 fined, nearly as wide posteriorly as vertex, and extendmg to dis- 

 tinctly beyond middle of frons, both triangle and frontal stripe opaque; 

 lateral margins with the hairs setulose, becoming stronger toward 

 posterior margin; frons slightly protruding in front; antennae of 

 moderate size, third joint rounded in front ; arista tapering, nearly bare, 

 shorter than width of frons; cheeks high, about twice as high as third 

 joint of antennae, and over half as high as the eye, which is small and 

 almost round; proboscis not elongated. Mesonotum impunctate, 

 the hairs short and rather irregular; between the prescuteUar bristles 

 there is a row of 4-6 setulse; scuteUum short but the outline not regu- 

 larly rounded, the apex somewhat acute; bristles strong, the apical 

 pair not much approximated. Legs normal; hind tibial spur shorter 

 than diameter of tibia. Wmgs with veins 2-3 divergent; third costal 

 division one-half as long as second ; veins 3-4 subparallel. 



Length, 2 mm. 



Described from Tifton, Georgia. 



Represented in U. S. National Museum by specimens from Claren- 

 don, Texas, July 31, 1909 (V. I. Safro); Victoria, Texas (J. D. 

 Mtchell); Piano, Texas, July, "in cornfield" (E. S. Tucker); Mesilla 

 Park, New Mexico (C. N. Ainslie). 



PROHIPPELATES, ne^A^ genus. 



This genus is distinguished from Hippelates by the presence of 

 orbital bristles and from Pseiidohippelates by the presence of the two 

 long hairs on proboscis in male and the flattened scuteUum, 



Type of this genus. — Hippelates pallidus Loew. 



PROHIPPELATES PALLIDUS Lo«w. 



Figs. 21-24. 



Hippelates pallidus Loew, Dipt. Amer. Sept. Ind. Cent., 6, 1865, epeciee 93. 



Female. — Pale yellow, shining; ocellar spot, and sometimes apex of 

 abdomen, blackened; arista black, or brown. Mesonotum occasion- 

 ally with indications of a reddish stripe on either side, but usually only 



