196 Psyche [October 
pteropleura, and hypopleura distinguish the species from its 
allies. 
Hylemyia sinuata sp. nov. 
Male. — Black, shining, thorax uniformly gray pruinescent, 
abdomen with gray pruinescence on sides of tergites, the dorso- 
central black vitta very broad. Legs black. Wings h 3 ^aline, 
fuscous at extreme bases, veins black. Calyptrse whitish. 
Halteres yellow. 
Eyes separated by a little more than width across posterior 
ocelli; orbits narrow, setulose to above middle; interfrontalia 
with one or two pairs of cruciate bristles; parafacial at base of 
antennae wider than third antennal segment, much narrowed 
below; cheek about as high as greatest width of parafacial, with 
a single series of bristles below; third antennal segment about 
1.5 as long as second; arista subnude; proboscis normal. Pre- 
sutural acrostichals uniserial, sparse, long; prealar over half as 
long as the bristle behind it; sternopleurals 1:2. Abdomen short 
and stout, hj^popygium rather large; processes of fifth sternite 
long and slender, their length along inner margin as great as 
that of basal two segments of hind tarsus, the inner margin of 
each sinuate and furnished at middle with a fringe of dense, 
short, stiff hairs, apex on inner side with a few short, fine hairs, 
the outer margin with some long bristles. Fore tiabi with an 
anterodorsal and a posterior bristle; fore tarsus as long as tibia; 
mid femur with a few bristles on basal half of anteroventral and 
postero ventral surfaces; mid tibia with two anteroventral, ante- 
rodorsal, posterodorsal, and postero ventral bristles; hind femur 
with a complete series of anteroventral, and some shorter poste- 
ro ventral bristles on basal half; hind tibia with three or four 
anteroventral, anterodorsal, and posterodorsal bristles, and a 
few posterior setulse. Outer cross-vein of wing almost straight. 
Length, 4 mm. 
Type, Newton, Mass., May 15, 1920 (C. W. Johnson). 
The peculiar processes of fifth sternite separate this speciee 
from any other in the genus known to me. 
