SUBFAMILY CALLIPHORINAE 281 
Steringomyia popoffana (Townsend) Shannon, Insecutor In- 
scitiae Menstruus 11:118, 1923. 
Male. Head height 8.0; width 9.2; length at antenna 5.2 and 
at vibrissa 5.5; bueca 0.40 eye height, black, with black hair and 
with thin gray pollen; frontale black, rather brown at lunule; 
frontal row consisting of either eight or nine strong bristles, 
the rows only narrowly diverging as they follow the margins of 
the frontalia and extend anteriorly to base of second antennal 
segment; front at narrowest 0.17 of head width, 0.26 at vertex 
and 0.30 at lunule, black, with silvery pollen; faciale orange to 
orange brown, well rounded, strongly convex anteriorly toward 
vibrissa, and with one or two rows of short black setae which 
ascend over half the distance from the vibrissa to the antennal 
base; clypeus mostly black, only moderately depressed; epistoma 
warped strongly forward from elypeal plane and a little nar- 
rowed from elypeal width, orange; palpus orange, 4.0 in length; 
antenna black, second segment orange brown apically, third 
segment four times as long as second, reaching fully 0.65 the 
distance to the vibrissae; arista with short black cilia for 0.65 
its length; back of head rounded, black, with silvery pollen, with 
about five or six rows of postocular cilia and only a few pale 
hairs on the metacephalon; parafaciale 1.2 in width opposite 
lunule; vibrissae set 2.8 apart. 
Thorax and scutellum like abina. 
Legs with fore tibia with but one posterior bristle; hind tibia 
with two long anterodorsal bristles, one near basal fourth and 
one near middle; otherwise like abina. 
Wing without spur or fold at bend of fourth vein; squamal 
lobes white; costal sections 2 to 6 in the proportion 54:30 :90 :30 :4. 
Abdomen blue, tessellated, with heavy whitish pollen in cer- 
tain lights especially anteriorly and laterally, often with oliva- 
ceous green reflections; only third and fourth segments with 
strong erect marginal rows of bristles. 
Genital segments (pl. 26, H and I) as illustrated. 
Female. Head height 10.8; width 18.2; length at antenna 7.6 
and at vibrissa 8.4; eye height 7.4; frontale 0.60 frontal width 
toward middle, narrower toward lunule; inner vertical bristles 
erect, outer vertical bristles two-thirds as long as inner; at vertex 
0.38 head width, the margins diverging to 0.40 at lunule; frontal 
row consisting of six strong bristles; parafaciale 2.2 in width 
opposite lunule, a little narrower below; vibrissae set 3.4 apart; 
palpus 5.5 in length; third segment of antenna 4.5 times as long 
as second. Wing with costal sections in the proportion 85:50: 
