20 



as broad, first and third veins strongly bowed forward, peduncle of 

 second posterior cell about half as long as the anterior branch of 

 the fourth vein, fifth vein forks slightly before base of first pos- 

 terior cell. Length 4 mm. Ten males. Stanford University, 

 California. Type No. 7668, U. S. National Museum. 



CULICIDAE. 



154 Cui^Ex INCIDENS Thorn. Ormsby County, Nevada. 



957 CuivEx CONSOBKINUS Desv. Ormsby County, Nevada. 



958 CuLEx TARSAUS Coq. Ormsby County, Nevada. 



TIPUIvIDAE. 



.102 HoLORUSiA GRANDis Bcrgroth. Ormsby County, Nevada. 

 Common. 



BIBIONIDAE. 



566 BiBio HiRTus Lw. Stanford University. 



1733 SCATOPSE NOTATA L. Stanford University. 



129 Dii^oPHUS BREviCEPS Lw. Ormsby County, Nevada. 



1734 Dilophus occipitalis Coquillet, new species. 



Black, a few indistinct spots on lower part of head, extreme 

 base of antennae, prothorax except a streak each side, mesonotum, 

 pleura except one or two spots and the lower portion, coxae and 

 femora, yellow, stalks of halteres whitish; head narrow and elon- 

 gate, about three-fourths as long as the thorax, cheeks about as 

 wide as height of eyes, distance from upper end of eyes to highest 

 point on the occiput about half the height of the eyes; body pol- 

 ished; hairs chiefly whitish; wings hyaline, stigma black; front 

 tibiae bearing two whorls of spines, one above the middle, the 

 other at the apex. Length 3 mm. A female specimen. Claremont, 

 Los Angeles County, California. Type No. 7669, U. S. National 

 Museum. 

 128 Dilophus SERRATicollis Wlk. Ormsby County, Nevada. 



LEPTIDAE. 



1735 SvMPHOROMYiA jOHNSONi Coq. Ormsby County, Nevada. 



1736 Symphoromyia laTipalpis Bigot. Ormsby County, Nevada. 

 88 Chrysopila proxima Wlk. Ormsby County, Nevada. 



1737 Chrysopii.a TESTaceipes Bigot. Ormsby County, Nevada. 



1738 Leptis flavonigra Coquillet, new species. 



Black, the apex of scutellum, halteres, tibiae, apices of front 

 and middle femora and bases of their tarsi, also the abdomen, 

 yellow, a large spot on sides of the fourth and fifth segments, the 

 ventral portion of these segments and nearly the whole of the fol- 



