25 



1540 DOLicHOPUS OBCORDATUS Aldrich. Orrasby County, Nevada. 



1755 DoLiCHOPUS PLUMiPES Scop. Ormsby County, Nevada. 



1011 DoLiCHOPDS POLLEX OS. Ormsby County, Nevada. Determined 

 by Coquillet. 



1756 DoLiCHOPUS RAMiFEK Lw. Ormsby County, Nevada. 



1757 Hekcostomus unicolor Lw, Ormsby County, Nevada. 



1009 Chrysotus subcostatus Lw. Stanford University. Determined 

 by Coquillet. 



1758 SciAPUS FiLicoRNis Aid. Ormsby County, Nevada. 

 158 PsiLOPUS MELAMPiJS OS. Ormsby County, Nevada. 



SYRPHIDAE. 



1759 Sphyximorpha tridens Lw. Ormsby County, Nevada. 

 146 Chrysotoxum laterale Lw. Ormsby County, Nevada. 



137 Omegasyrphus (Microdoti) baliopterus Lw. Ormsby County, 



Nevada. 

 ;^49 Paragus angustifrons Lw. Ormsby County, Nevada, and also 



Stanford University (749). 



1760 Paragus bicolor Fabr. Ormsby County, Nevada. 

 150 Paragus tibialis Fall. Ormsby County, Nevada. 

 756 Myiolepta varipes Lw. Stanford University. 



1761 Chrysogaster bellula Will. Ormsby County, Nevada, and 



also Stanford University. 

 91 Chrysogaster nigrovittata Lw. Ormsby County, Nevada. 



1762 Chrysogaster stigmata Will. Ormsby County, Nevada. 



1763 Cheilosia plumosa Coquillet, new species. 



Black, with a bluish tinge, the third joint of antennae except 

 the apex reddish yellow, halteres light yellow; hairs on upper half 

 of front rather long- and black, those on the remainder short and 

 chiefly whitish, upper part of face deeply excavated, the tubercle 

 very prominent and rather pointed, sides of face bearing a series of 

 whitish hairs, eyes bare, third joint of antennae rather large, 

 ellipsoidal, arista rather sparsely long-plumose, hairs of body 

 whitish, scutellum without black marginal bristles, abdomen pol- 

 ished; wings hyaline, the base and stigma yellowish, veins blackish, 

 calypteres white. Length 5.5 mm. Ormsby County, Nevada. Type 

 No. 6711, U, S, National Museum. 



1764 Cheilosia plutonia Hunter. Ormsby County, Nevada. 

 J765 Cheilosia willistoni Saow. Ormsby County, Nevada, 



995 Pipiza pisticoides Will, Stanford University. 



148 Melanostoma stegndm Say. Ormsby County, Nevada, and also 



Stanford University (37). 



149 Baccha fascipennis Wied. Ormsby County, Nevada. 



1541 Syritta pipikns L. Ormsby County, Nevada, and also Stanford 

 University. 



