1924 ] New Caly pirate Diptera from New England 197 
Hylemyia longipalpis sp. nov. 
Male — Black, slightly shining, densely gray pruinescent, 
the abdomen with a slight bluish tinge. Anterior margin of 
frons and of parafacials reddish; orbits, parafacials, face, and 
cheeks with silvery pruinescence; antennae and palpi black. 
Thorax indistinctly vittate. Abdomen with a black dorsocentral 
vitta which is dilated at anterior and posterior margin of each 
segment. Legs black. Wings hyaline. Calyptrae white. Hal- 
teres brownish yellow. 
Eyes separated by about the distance between posterior 
ocelli; orbits almost obliterating interfrontalia in front of ocelli; 
orbital bristles extending to middle interfrontalia with a weak 
pair of cruciate bristles; parafacials at base of antennae as wide 
as third antennal segment; slightly narrowed below; cheek as 
high as widest part of parafacial, armed as in flavifrons; third 
antennal segment on inner side subequal in length to second; 
arista swollen on basal fourth, almost bare; palpi longer than 
usual, slightly spatulate at apices. Thoracic dorsum with 
sparse, erect, long hairs; three pairs of acrostichals in front of 
suture; prealar about one third as long as the bristle behind it; 
sternopleurals 1:2. Abdomen depressed, narrow, the segments 
subequal; seventh tergite (fifth visible) with numerous long 
fine bristles; fifth sternite with the processes short, glossy and 
almost bare at apices. Fore tibia with several fine setulose hairs 
on posterior surface, the apical posterior bristle minute; fore 
tarsi compressed, as long as tibia; mid femur with a series of 
strong bristles on basal half of anteroventral and posteroventral 
surfaces and another series above the latter; mid tibia with two 
posterodorsal and posterior bristles; hind femur with very long 
bristles, which are rather closely placed, on anteroventral and 
posteroventral surfaces, the latter not extending to apex; hind 
tibia with three long bristles on posterodorsal surface, about 8 
or 9 short anterodorsal and anteroventral setulse, and some hairs 
on middle of posterior surface. Costal thorn minute. 
Female. — Differs from the male in having the head with 
brownish pruinescence, the interfrontalia reddish, and the ab- 
domen unmarked. 
