220 THE BLOWFLIES OF NortH AMERICA 
silvery pollen and with a few scattered minute black setae out- 
side frontal row; ocellar triangle with a number of erect black 
proclinate hairs; elypeus black, with heavy silvery pollen toward 
lunule; parafaciale opposite lunule 0.9 in width, somewhat wider 
below; faciale rather strongly convex in profile; vibrissae 1.0 
above oral margin and 2.2 apart; palpus 3.2 in length, dark 
brown to black; antennae slightly separated at base by low nar- 
row carina, broadening immediately below first antennal seg- 
ment and-extending to about middle of clypeus but decreasing 
in height toward epistoma; antenna dark brown to black, third 
segment 2.9 times as long as second; arista black, with long black 
cilia for three-fourths its length; back of head with some lhght 
hairs, particularly below on metacephalon. 
Thorax colored as in elongata; propleural bristles in tuft; post- 
acrostichal bristles three, strong; scutellum similar to that of 
elongata, but under surface with black setae laterally nearly to 
middle. 
Legs with middle tibia usually with two posterodorsal bristles. 
Wing (pl. 9, J) with subcostal sclerite dark brown, black 
apically; basicosta black; costal sections 2 to 6 in the proportion 
62 :39 :86 :30:8; third vein setulose from 0.3 to 0.6 the distance 
to the cross vein; upper. squamal lobe white, often orange to 
brownish on rim; lower Sena lobe white basally, darkening to 
brown apically. 
Abdomen colored like thorax, second segment with an obvious 
dark shining spot anteriorly on the middorsum, and usually with 
a pair of long erect median marginal bristles but often with 
several pairs, the closest lateral bristles small and inconspicuous, 
the median bristles more noticeable by contrast. 
Genital segments black, greenish metallic on dorsum, each 
segment with long black erect bristles. Internal anatomical fea- 
tures (pl. 23, E and F) as illustrated. 
Female as in female of elongata except head width 11.6; 
height 8.6; length at antenna 5.2 and ut vibrissa 5.9; bucca 0.27 
of eye height; frontale red orange at lunule but darker posteri- 
orly; front at narrowest (slightly above lunule) 0.81 head width, 
0.32 at vertex and 0.33 at lunule; third antennal segment 3.2 
times as long as second; parafaciale 1.3 in width opposite lunule; 
vibrissae set 2.4 apart; palpus 2.4 in length. Wing with costal 
sections 2 to 6 in the proportion 66:40:86 :34:9; squamal lobes 
light in color, usually more orange than brownish. Otherwise 
similar to male except for normal sexual differences. 
Length. 5-8 mm. 7 
Distribution. Holarctic. Europe; Asia; North Africa; North 
