214 THE BLOWFLIES oF NortH AMERICA 
segment slightly orange brown basally, 3.4 times as long as 
second; arista with black ciliation; back of head black, with thin 
silvery pollen, with three or four rows of postocular cilia, the 
first row composed of longer cilia; below with only black hair. 
Thorax shining metallic blue green with bronze and purple 
reflections, very thinly silvery on pleura, dorsum from anterior 
view with dark stripes laterad of acrostichal row of bristles 
which extend slightly beyond suture; humerus concolorous and 
longer than in Luctlia or Phaenicia; propleuron with white pollen 
and with thin dark setae; hindmost preacrostichal bristle and 
hindmost predorsocentral bristle placed 1.8 and 0.8, respectively, 
before the suture; hypopleuron bare on anterior three-fourths; 
*pteropleuron with black setae on posterior half; prosternum with 
black setae laterally; postalar declivity with a few short black 
setae in center; sclerites at wing base dark brown or black; posta- 
lar callus concolorous and with dark brown hair. 
Legs black or slightly brownish; middle femur with one an- 
terior bristle near middle, about four longer anteroventral and 
posteroventral bristles; middle tibia with one ventral bristle 
near middle, and one posterodorsal bristle near middle; hind 
tibia with an anterodorsal row of about six or eight bristles, two 
or three of which are stronger than the others in the series, one 
or two anteroventral bristles slightly beyond middle, and two 
_or three posterodorsal bristles, one near middle and one near 
apical third always present, one near the basal fourth either 
present or absent. 
Wing (pl. 9, I) hyaline, only slightly brownish basally; basi- 
costa dark brown; subcostal sclerite dark orange brown, darker 
apically, with fine dark brown recumbent pile; costal segments 
2 to 6 in the proportion 55:39 :85:38:7; third vein setose from 
three-fourths to four-fifths the distance from base to cross vein; 
squamal lobes infuscated, white, the inner posterior margin of 
the lower lobe brown. 
Abdomen colored like thorax, with thin whitish pollen in cer- 
tain lights; first segment black; second segment with a shining 
middorsal longitudinal stripe which extends from anterior to 
posterior margins. 
Genital segments black, slightly metallic greenish, and with 
long black setae, the first segment without a marginal row of 
bristles. Internal anatomical features as illustrated (pl. 28, A, B, 
and C). 
Female. Head (pl. 4 D) height 9.0; eye height 6.6; bueea 0.36 
of eye height; length at antenna 6.0 and at vibrissa 6.8; parafaci- 
ale opposite lunule 1.4 in width; distance between vibrissae 2.8; 
