278 AMERICAN DIPTERA. 



10. I^ASIOPOCJOIV Loew. 

 Iiasio|>og4»n quadrivittaliiM n. sp. 



Near L. arenicola O. S. 9- Length 9-11 mm. Black, covered eveiTwhere 

 with dense grayish pollen. Front broad, densely gray pollinose, hair every, 

 where whitish, that of occiput with a more decided yellowish tinge, beard and 

 hair on occipital margin fine, silky and purer white. Face in profile with a 

 strong gibbosity reaching more than half the distance from the oral margin to 

 the base of the antennse. Antennae black, first two joints nearly equal, second a 

 trifle longer than the first, third longer than the first two together, style about 

 one-half as long as the third joint, first two joints of the antennse with whitish 

 hair. Thorax black, covered with dense grayish pollen and very fine white j)ile, 

 a few light colored bristles on the lateral margins and posterior part of the dor- 

 sum, four brownish nearly median stripes on the dorsum, diverging anteriorly, 

 the pollen on the lateral margins brownish, forming an obscure stripe. The 

 interval between the inner stripes is wider than that between the others so that 

 there appears to be two geminate stripes. Scutellnm flat, covered with pollen 

 similar to that of the thorax, and with a row of light colored bristles on the pos- 

 terior margin. Pollen of the pleura gray, with a brownish tinge. Halteres 

 yellowish, the fan-like row of hairs in front white. Abdomen black, covered 

 with dense grayish pollen and very fine, short, decumbent whitish pile, anterior 

 margins of the second, third and fourth segments reddish-brown, last segment 

 shining black. Bristles on the posterior lateral margins of the first segment 

 whitish. Legs black, covered with dense, fine, whitish pile, longeron the under 

 side of the femora, and interspersed with a few light colored bristles. Coxa; and 

 legs with brownish-gray pollen, thicker on the coxse, coxte with long white pile. 

 Wings hyaline, anal cell closed and petiolate, fourth posterior cell slightly nar- 

 rowed at the margin of the wing, anterior cross-vein at the middle of the dis- 

 cal cell. 



Type. — One female from Halsey, Nebraska, June 1, 1906 (H. S. 

 Smith). 



Paratypes.— One female from War Bonnet Canon, Sioux Co., 

 Nebraska, May 27, 1901 (M. A. Carriker) ; and one female from 

 Bad Lauds, INIouth of Monroe Canon, Sioux Co., Nebraska, May 

 28, 1900 (L. Bruner). 



This species can be readily distinguished from L. arenicola 0. S. 

 in being more densely pollinose and not so densely pilose as that 

 species. The thoracic stripes will also serve to separate them, and 

 my specimens of L. arenicola from Southern California have a few 

 black bristles on the lateral margins of the thorax which quadrivit- 

 tatus does not have. 



11. II(»L,01:EPI1AL.A Jaeunicke. 

 Holocepliala abdoiniiialis Say. 



Specimens from Cedar Bluffs and Meadow, Nebraska. ^^^i 



This is the first record of this species being taken this far west; 



