AMERICAN DIPTERA. 209 



the ground color. The third antennal segment Httle longer than the 

 reddish-yellow basal segments, elongate oval, black, on the outer base 

 sometimes yellowish; style likewise black or blackish, considerably 

 longer than half the length of the third segment. Proboscis blackish; 

 palpi of same color as rest of the body. The divided median stripe of 

 the thoracic dorsuin with a little light bloom, darker than the lateral 

 stripes, noticeably only on the darker specimens; lateral stripes not 

 very evident in unrubbed specimens. Abdomen long and slender, 

 much as in longuhis, with a patch of bristles on sides of the first three 

 segments; hair on all the segments very short, appressed ; genitalia 

 and legs of the same color as the rest of the body. Legs thinly grayish 

 pruinose, the femora on the upper side with more or less broad blackish 

 longitudinal vittae, which on the middle femora are apt to be darker, 

 or sometimes wholly wanting; all these vittas more or less obscure; 

 apical half of claws black. Wing hardly reaching beyond the tip of 

 the fifth abdominal segment, with darker yellowish-gray or light sand 

 colored opaqueness; the veins light brown near the anterior border, 

 brownish-black elsewhere; the first and fourth posterior cells usually 

 closed and petiolate. 



Type.—U. C. Z. 



Habitat. — Texas (type), Dallas, Tex.; Segwick Co., Ks. 

 (Aug., E. S. Tucker); Glen, Sioux Co., Nebr. (P. R. Jones). 



Stenopojioii (Scleropogou) siiuilis. 



Scleropogon siniilis Jones, Trans. Am. Ent. Soc, XXXIII, 274, 

 1907. 

 " 9- — Near 5. helvolus. Length of body 24 mm.; of wings 12 min. 

 When compared with S. helvolus, the antennae are shorter, third joint 

 broader and less than the length of the first two joints together. Style 

 as long as the third joint, first two joints yellowish-red, apex of second 

 darker, third joint and style black. The specimen is somewhat 

 rubbed, but where the pollen can be seen it is similar to that of the 

 preceding species. Wings hyaline, first posterior, fourth posterior and 

 anal cell closed, the two former petiolate. Hypopleura with a patch 

 of bristles." 



Type. — University of Nebraska. A single rubbed female. 

 Habitat. — Valentine, Nebr. 

 I have never seen this species. 



Stenopogou (Sc-leropogou) picticoriii.s. 



Scleropogon picticornis Loew, Cent., VII, 45, 1866. 

 9. — Length of body 20 mm.; of wing 15 mm. — Translation. — Rufes- 

 cens, clothed with very pale yellow or whitish pile and bristles; head, 

 excepting the oral margin, the second segment of the antennae, together 



TRANS. AM. ENT. SOC, XXXV. (27) JUNE, 1909. 



