37 



abdomen bearing- only raarg-inal bristles on the second and third 

 seg-nients and discal and marginal ones on the fourth, venter devoid 

 of spines. Middle tibiae bearing a single bristle on the front side 

 near the middle, front-tarsi not dilated. Wing-s hyaline, third vein 

 bristled more than half way to the small cross vein. Calypteres 

 white. Ivength 6 mm. A female specimen. Stanford University, 

 California. Type No. 7671, U. S. National Museum. 



1813 BiOMYA GEOKGiAK Br. & Berg. Ormsby county, Nevada. 



1814 Biomya m^tabilis Coquillet, new species. 



Black, the frontal lunule, first joint of antennae, apex of second 

 and base of the third joint, also the palpi, yellowish; vertex about 

 as wide as either eye, two pairs of orbital bristles, frontals descend- 

 ing- nearly to apex of second joint of antennae, sides of face at 

 narrowest part slightly over one-third as wide as the facial depres- 

 sion, bare on the lower half, the remainder with short sparse hairs, 

 like the front; vibrissae situated slig-htly more than length of sec- 

 ond antennal joint above anterior edge of oral marg-in, four or five 

 bristles above each; antennae two-thirds as long as the face, the 

 third joint slightly over twice as long as the second, arista bare, 

 thickened on the basal third, cheeks slightly over one-third as wide 

 as the eye-height. Thorax gray pruinose, mesonotum marked with 

 four black vittae, four pairs of postsutural dorsocentral bristles, 

 three sternopleurals. Abdomen gray pruinose and with darker 

 reflecting spots, the first three segments bearing only marginal 

 bristles. Middle tibiae bearing two stout bristles on the front side 

 near the middle, hind tibiae not fringed Wings hyaline, third 

 vein bearing three bristles hear the base. Calypteres whitish. 

 Length, 8.5 mm. A female specimen. Ormsby county, Nevada. 

 Type No. 7672, U. S. National Museum. 



1815 CeIvATOKia diabroTicae Shimer. Stanford University. 

 31 CiSTOGASTER IMMACULATA Mcq. Stanford University. 



63 CrypTOMEIGEnia theutis Wlk. Ormsby county, Nevada. 



122 ECHINOMYIA ALGKNS Wied. Ormsby county, Nevada. 



123 ECHINOMY'IA DAKOTENSis Twn. Ormsby cou nty, Nevada. 



1816 Epigeimyia SETigera Coq. Stanford University. 



1817 Exorista nigripalpis Twn. Ormsby county, Nevada. 



75 Exorista pyste Wlk. Ormsby county, Nevada. 



1818 Exorista trisetosa Coq. Ormsby county. Nevada. 



76 FronTinia FRENCHii Will. Ormsby county, Nevada. 



1819 GoNiA CAPiTATA DeG. Ormsby county, Nevada, and also at 



Stanford University. 

 26 Graphomyia maculata Scop. Stanford University. 

 81 Gymnosoma fuliginosa Desv. Ormsby county, Nevada, and 



also at Stanford University (32). 



1820 HeteROPTERNIa nasoni Coq. Ormsby county, Nevada. 



1821 HH.AREI.I.A ARiSTAtis Coq. Stanford University. 



1822 HiivAREi,i,A SIPHONINA Zett, Ormsby county, Nevada. 



