ADAMS : DIPTEROLOGICAL CONTRIBUTIONS. 35 



tinged with browa, veins dark brown, first posterior cell closed 

 and petiolate, the petiole almost as long as the posterior cross- 

 vein. Length, 3.5 mm. 



Two specimens; Arizona. Prof. F. H. Snow. 



Zodion bicolor, n. sp. 



Male : Black, gray pollinose ; face and cheeks yellowish 

 white, front fulvous, darker on upper half, antennte red, hairs 

 and arista black, occiput largely, and proboscis with the small 

 palpi wholly, black; thorax thickly gray pollinose, pile black, 

 halteres yellow ; first segment of abdomen black, remaining 

 segments red, pile black; legs reddish, with front and middle 

 femora on top and hind ones near apex, all tibiiie and tarsi near 

 apices black ; wings, except base, tinged with brown, first pos- 

 terior cell closed and petiolate, petiole shorter than the small 

 cross- vein. Length, 5 mm. 



Two specimens ; Douglas county, Kansas. Prof. F. H. Snow. 



Myopa.— Table to the species. 



1. Cheeks below very distinctly fringed with pile ; wings with spots 2 



Cheeks not fringed with pile below 3 



2. Face with black spots inctipennis Will . 



Face without black spots; pile of abdomen long pilosa Will . 



3. Abdomen chiefly black 4 



Abdomen red or reddish 5 



4. Pile of abdomen light yellow vesiculosa Say . 



Pile of abdomen black plebeia Will . 



5. First posterior cell closed : clausa Loew . 



First posterior cell open 6 



6. Mesonotum, except humeri and sides, black tectura, n sp . 



Mesonotum with three black spots clausa var. aperta Boeder . 



The above is a continuation of Doctor Williston's table to re- 

 ceive the new species. 



Myopa tectura, n. sp. 



Male : Rufous, opaque ; face and cheeks yellow, front con- 

 colorous, with ocellar spot black, antennae red, shorter than in 

 oj)erta, hairs black, upper half of occiput reddish, proboscis and 

 palpi brown ; thorax red, mesonotum, except sides and humeri, 

 and metanotum black, latter subshining, halteres yellow, knobs 

 reddish ; abdomen opaque, rufous throughout, pile black ; 

 coxae rufous, black at apices, femora and tibiae opaque red, 



2-Bull., No. 2. 



