258 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.46. 



GEOUP F. 



Species with Mesonotum Yellow with Distinct Stripes. 



22. mPPELATES IMPRESSUS Becker. 

 Fig. 16. 

 Hippelates impressus Becker, Ann. Mus. Nat. Hung., vol. 10, 1912, p. 92. 



Female. — Yellow, subshining. Ocellar spot and back of head 

 blackened; disk of thorax reddish yellow, covered with grayish 

 pollen, the three punctate lines generally darkened. Abdomen 

 generally brown above, or with anterior marginal dark bands, which 

 sometimes are tridentate or almost in three rows of spots. Hairs 

 pale, bristles brownish. 



Frons distmctly, but not greatly broader than either eye; triangle 

 nearly the Avhole wddth of vertex, forming an almost equilateral tri- 

 angle, its apex slightly beyond middle of frons, sides straight; surface 

 hairs sparse, weak; antennse normal in size and shape; arista with 

 basal joints elongated and swollen, apical portion brown, pubescent, 

 length of arista slightly more than equal to width of frons; cheeks 

 rather less in height than the breadth of third antennal joint; eyes 

 bare, distmctly higher than long; proboscis with apical portion 

 slightly prolonged, bent backward. Mesonotum with the sulci dis- 

 tinct, each of these with a double row of hau-s in it, and between them 

 and the central, narrower, line there are 3 and 4 rows of short hairs ; 

 scutellum with rounded outluie; apical pak of bristles slightly ap- 

 proximated, basal pau* much weaker than apical pair. Legs normal, 

 hind tibial spur situated close to apex of tibia, bent, not longer than 

 diameter of tibia. Wings with third costal division one-half as long 

 as second; veins 3 and 4 subparallel; outer cross vein slightly oblique. 



Length, 1.25-1.75 mm. 



Described originally from Santa Gertrudes, Texas, a stage station 

 about 50 miles from Brownsville, by Becker. I have before me 

 specimens from the same lot, taken by E. A. Schwarz, and specimens 

 from San Diego, Texas; Beeville, Texas; Sharpsburg, Texa,s; Santa 

 Rosa, Texas; Newcrest, Texas; and Bright Angel, Arizona (H. S. 

 Barber). None of the Texan specunens except those taken by E. A. 

 Schwarz have collector's names on them. There are also two speci- 

 mens in U. S. National Museum collection from Filmore Canyon, 

 Organ Mountains, New Mexico (C. H. T. Townsend). These latter 

 were taken at a height of about 6,000 feet in August; the dates for the 

 other specimens range from end of April to June in Texas, and July 10 

 in the case of the one from Arizona. The Arizona specimen bears a 

 label: "Very annoying by lighting on face and hands while working." 



