218 lit i.LiniN :!i, united statEkS national museum. 



Crioprora cyanogaster. 



Brudijipa^piis ciianoyaittev Lotnv, Ceulnr.,x, 51. 



Crioprora (:f,(uwi,n8ttr Osteii Sackeii, Cat. Dipt., \'^<q, note *24l, ]>. 251. 



Habitat. — Pennsylvania (Loew), Colorado! 



9. Lenjitli, 11""". Black, white pilose. Abdomen violaeeous, 

 Elack, sinning, white pilose. Head of the same color. Antennae fus- 

 cous black, lirst two Joints rather lon<^, third obli(jiu;. Dorsiip.i of 

 thorax and scntellum bronze-black. Abdomen rather bioad and short 

 lijihtly viohuH'ons. white pilose, the third se<iinent, except the lateral 

 7nar;;ins and the fourth seg:ment, except some white pile on tlie disk, 

 clothed with shorter black pile. Legs wholly black, wiiite jiilose; hind 

 femora stout, but not incrassate, near the tip below sul)-exeise(l, and 

 provided with rigid black setula?. Head of the halteres ddutely yellow- 

 ish, stem fuscous; teguhe white. Wings cinereous, hyaline, near the 

 tij) more saturate cinereous. Tip of costal cell and stigma wholly di 

 lutely infu.scate. Veins fuscous-black, the transversal ones slenderly 

 clouded with fuscous. — Translation fiom original, 



$. Length, 12""". Head in ])r()tile like that of (\ femorata. Eyes 

 narrowly separated below the ocelli ; frontal triangle light yellowisli- 

 gtay i)ollinose, except a median shining stri])e. the ground-<;olor on each 

 side below luteons. Antenna' yellowish-brown. Dorsum ot thorax and 

 .scutelluni rather thickly clothed with light yellowish gray pile; ou the 

 l)leura? of the same color. Abdomen elongate, not broader than the 

 thorax, shining. First segment and base of second bronzy ; remainder 

 violaceous. Third and fourth segments wholly black pilose. Noo[)aque 

 black (;ross bands. Tarsi dark reddish brown; ))ile of femora in large 

 ])art black; hind femora incrassate and arcuate; hin<l tibijB dilated 

 and with an obtuse angle on the inner side above. 



One si)ecimeii, Colorado (Morrison), altitude 8,000 feet. There are 

 some discrepancies troin the original description, but 1 would not con- 

 sider them more than individual or varietal without comparison of 

 Eastern si)ecimeus in both sexes. My nude differs very distinctly from 

 that of G. cyanella, in the less produced epistoma, more thickened and 

 arcuate hind femora, and, perhaps, also, in the more slender abdomen. 

 The absence of the opaque bands of the abdomen in the male, will at 

 once distinguish them. My female of C. cyanella has an opaque band, 

 and as Osten Sacken did not indicate its i)resence in the female in his 

 original description, drawn from both sexes, I am at a loss whether to 

 consider it a sexual or individual character. 



Crioprora cyanella. (Plate X, fig. (i. ) 



Pocuta cyanella Osten Sackeu, West. Dipt., 339. 



Crioprora cyanella Osten Sacken, Cat. Dipt., 136, note 241, p. 251. 



Habitat. — California ! 



5,9. Length, 8 to 10""". Face black, shining, much produced snout- 

 like, very conical at ti]) ; on each side of this snout a broad stripe of 

 grayish pollen somewhat Cv>nceals the black ground color. Front and 



