| A 
154 Tre BLOWFLIES oF NortH AMERICA 
the seutellum, the intermediate blue-green stripes strongly 
whitish in certain lights; pleura lightly silvery; propleuron with 
black pile; notopleuron strongly setose, the setae long; meso- 
pleuron with black setae; sternopleuron with black hair but with 
a few pale hairs on the posterior margin; hypopleuron with 
black hair on posterior margin and yellow hair on dorsal mar- 
gin; pteropleuron with thickset yellow hairs posteriorly; pos- 
talar wal! in center and posteriorly with tuft of black setae; 
preparapteron yellow, with fine, white, decumbent pile; pre- 
epaulet black, tympanic pit with black hairs; sclerites at wing 
base black; greater ampulla black, with fine, white, decumbent 
pile; mesothoracic spiracle with yellowish white hair and meta- 
thoracic spiracle with brownish white hair, the latter with long 
black hairs on the anterior margin; lateral postscutellar plates 
with black setae; under surface of scutellum with fine black hair. 
Legs black and orange; coxae black, fore femur black basally 
and orange red apically, fore tibia reddish brown to brown at 
base and orange red apically; hind femur orange brown at base 
and orange red apically; hind tibia orange red to brown; tarsi 
orange brown to black; claws black, pulvilli brown. 
Wing (pl. 9, D) infuseated at base; costal sections 2 to 6 in 
the proportion 91:62:98 :32:9; subcostal sclerite orange at base, 
brown apically, third vein setulose one-fourth the distance to the 
cross vein; fourth vein with angle at 90 degrees, then gradually. 
curving toward wing tip and ending before apex by 1.0; squamal 
lobes brownish to black. 
Abdomen metallic bluish with green and black luster, and with 
thin pollen which appears silvery in some lights; second and 
third tergites with a shining, longitudinal, middorsal stripe 
which extends from a widened base on the anterior portion of 
second segment to a very narrow line posteriorly on third seg- 
ment; ventral margins of all tergites with whitish pollen; fourth 
segment with scattered weak erect hair; fifth sternite (pl. 19, C) 
as illustrated. , 7 
First genital segment black, metallic green, shining, with scat- 
tered setae; second segment black, shining, with scattered setae. | 
Internal anatomical features (pl. 19, A, B, and D) as illustrated. 
‘Female. Head (pl. 2, D and E) height 18.3; length at an- 
tenna 6.9 and at vibrissa 8.4; eye height 8.8; buecca 0.51 of eye 
height; parafaciale opposite lunule 2.3 in width; distance be- 
tween vibrissae 2.3; front at vertex 0.34 of head width and 0.41 
at antennal base, the margins obviously bent outwards below 
ocellar triangle and curving inward again anteriorly; frontale 
orange red with numerous, scattered, short, black hairs, es- 
