PAUL R. JONES. 279 



12. HOL.OPOGON Loew. 

 Holopogoii seiiiculus Loew. 



Specimens from Glen, Sioux Co., Nebraska (P. R. Jones). 



13. PYCNOPOGOM Loew. 



Pycnopogon cirrhatus Ost.en Sacken. 



Two males from War Bonnet Canon, Sioux Co., Nebraska, which 

 answer in every way to the description, except that the tip of the 

 abdomen is red. The specimens are also larger, being about 12 

 mm. in length, 



14. STICHOPOGON Loew. 

 Stichopogon trifasciatns Say. 



Two males and two females from Glen, Sioux Co., Nebraska (P. 



R. Jones). 



15. HETEROPOGOM Loew. 



Heteropogon nigripes n. sp. 



9 . Length 9 mm. Near H. lautus Loew. Head broader tlian higb, front but 

 sligbtly excavated, front and face white pollinose, covered with long white hair, 

 above the mouth and near the ocellar prominence black. Face flat, slightly 

 convex below, wide. Antennse black, first and second joints equal, third slightly 

 longer than the first two together, style slender, about two-thirds the length of 

 the third joint. Thorax black (slightly greased in the specimen at hand), covered 

 with long light colored pile, pleura whitish pollinose, covered with long white 

 pile, scutellum similar in color to the thorax, but with a brownish tinge, covered 

 with long white pile and a marginal row of weak bristle-like hairs, dark at base 

 and white at apex. Halteres dark brown or black, stem slightly lighter, fan-like 

 row of hairs iu front white. Abdomen black, shining, dorsum covered with 

 very fine, short, sparse, light colored pile, lateral margins with long white pile, 

 posterior lateral margins of first six segments with a white pollinose spot. Legs 

 black, covered with long light colored pile, weak bristles of tibiae light colored, 

 pile of tibiae and tarsi yellowish, shorter and denser than that of the femora. 

 Wings hyaline, veins at base of submarginal, first, second, fourth and fifth pos- 

 terior and discal cells clouded with black. ' 



Type. — One female from Monroe Canon, Sioux Co., Nebraska 

 (L. Bruner). 



This species can be separated from H. lautus by its having the 

 legs entirely black, and the pilosity of legs being different. 



16. S.4ROPOGON Loew. 

 Saropogon adustus Loew. 



A female from McCook, Nebraska, which I believe to be this 

 species. The legs are entirely yellow, but the apex of the third 

 joint of the antennae is black. Wings hyaline, with a yellowish 

 tint, apex blackish. 



TE.4.NS. AM. ENT. SOC. XXXIII. JULY. 1907. 



