118 THE BLOWFLIES OF NortH AMERICA 
0.11 of head width at vertex and 0.20 at lunule, with moderate 
golden pollinosity and with some setae outside the frontal rows 
of bristles which extend anterior to the foremost frontal bristle; 
frontal rows of bristles extending to about the middle of the 
second antennal segment and obsolete or vestigial near middle of 
front, each row consisting of about 7 to 9 bristles; vertex sub- 
pollinose, brown; clypeus yellowish; parafaciale 0.8 in width op- 
posite lunule, orange in ground color, golden pollinose; palpus 
3.9, orange; antenna yellow orange, third segment three times as 
long as second; arista yellow, black at tip, plumose, the hairs 
dark; back of head dark brown above, orange below, and with 
abundant yellowish hairs of medium length. 
Thorax dull metallic greenish blue over brownish to black 
eround color, with thin whitish pollen anteriorly and with indis- 
tinct fuscous longitudinal stripes which do not extend posteriorly 
over the scutellum; pleura lightly silvery; humerus concolorous; 
propleuron whitish pilose; mesopleuron black setose except on 
anterior one-fourth; hypopleuron with only a few hairs above 
and posteriorly; pteropleuron with black setae on posterior half; 
prosternum with scattered yellow setae; postalar declivity in 
center with black setae; preparapteron yellow orange; pre- 
epaulet, squamal process, postparapteron and its rim, brown; 
greater ampulla dark brown with fine decumbent pile; meso- 
thoracic spiracle whitish; metathoracic spiracle orange; lateral 
postscutellar plate with black setae; under surface of scutellum 
with fine brown setae. 
Legs orange brown; coxae yellow orange with some yellow 
pile; tarsi reddish brown; claws black, pulvilli brown. 
Wing (pl. 9, C) infuseated; costal sections 2 to 6 in the pro- 
portion 70:50 :100 :40:8; third vein setulose one-third the distance 
to the cross vein; squamal lobes tinged with yellow orange. 
Abdomen brownish in ground color, metallic greenish blue 
with thin whitish pollen; first segment yellowish orange at base 
below; with a narrow shining longitudinal middorsal stripe 
extending from the first to fourth segment, least apparent on 
third; fourth segment with erect discal hairs. 
Genital segments brownish with a slight bluish green luster; 
both segments with scattered black setae. Internal features 
(pl. 17, A, B, C, and D) as illustrated. 
Female. Head (pl. 2, A) height 10.0; eye less elongate and 
more ovate than in male and bucea higher in proportion to eye 
height; front at narrowest (1.5 units above lunule) 0.24 head 
width, 0.29 at vertex, and 0.380 at lunule; frontal row of bristles 
extending anteriorly to antennal base; parafaciale 1.4 in width 
