PROCEEDINGS OF THE NATIONAL MUSEUM. 439 



PLATYPALPUS TERSUS, new species. 



Male and female.— YeWow in all its parts, only the eyes and arista 

 black. Third antenna! joint short oval, scarcely longer than broad. 

 Front femora twice as thick as the hind ones, middle femora one-half 

 tliicker than the front ones. Wings hyaline, third and fourth veins 

 parallel, second basal cell longer than the first, sixth vein obsolete on 

 its basal fourth, anal cell therefore open behind except near its apex. 



Types.— ^os. 3243 and 3244, U.S.N.M.; length, 2 to 3 mm. Five 

 males and eleven females in the Museum collection. 



Locality.— Georgia and iTorth Carolina. 



PLATYPALPUS INCULTUS, new species. 



Male.—neMl black, shining; antenme black, third joint short oval, 

 scarcely longer than broad, arista four times as long as the antennine ; pro- 

 boscis one-half as long as height of head, palpi black. Thorax shining 

 black, its pile quite abundant, but short, depressed, yellowish; pleura 

 shining black, not pollinose; scutellum black, bearing two long apical 

 and two much shorter lateral bristles. Abdomen like the thorax. 

 Front cox* yellowish, less than one-half as long as their tibue, the 

 others black; front and middle legs yellowish, upper and lower sides of 

 the femora blackish brown ; tarsi and hind legs, except bases of tibuiB, 

 blackish brown; front femora slightly thicker than the others, middle 

 femora scarcely as thick as the hind ones ; legs destitute of long bristles 

 or pile. Knob of halteres yellowish. Wings hyaline, veins brownish, 

 third vein reaching the costa slightly before the extreme apex of wing, 

 second basal cell longer than the first a distance equaling three times 

 the length of the cross vein at apex of the former cell; cross vein at 

 apex of anal cell, and basal half of sixth vein, obliterated. 



Ti/^e.— No.324r),U.S.N.M.; length, 2 mm. A single male collected 



in April. 

 Locality.— Honthevn California. 



Genus TACHYDROMIA, Meigen. 



ANALYTICAL KEV TO THE SPECIES OF TACHYDROMIA. 



1 



Thorax Avbolly black 



Thorax yelloNvish ; inhabits Jamaica, West Indies '"'c*'«. 



1 WiufS aestituto of brown cross bands - - 



Wings whitish, marked with two broad, brown cross bands; anal cross vein 



wantiu.', legs more or less yellowish, scutellum Ijeariug four bristles 



'^ schwarsii (p. 440). 



2 Win"-s ..-ray, costal edge to third vein brown, anal cross vein wanting, front 



"^ and ^niddle femora striped with black, the hind <.nes largely black 



pusilla. 



Wines grav, veins bordered with brown; legs, antenna^, and halteres yellow 



° " vitti2>eiints. 



