142 THe Buowruises or Nortao AMERICA 
hind femur usually orange reddish or brown; hind tibia usually 
orange red to brown and with a row of short fine anterodorsal 
setae; tarsi orange brown, sometimes nearly black; claws black; 
pulvilli whitish. 
Wing slightly tinged with orange brown toward base and with 
wing veins usually orange brown to dark brown; costal sections 
2 to 6 in the proportions 78:56:96 :30:6.6; subcostal sclerite 
orange, setose; basicostal scale orange brown; remigium bare 
basally below; third vein setulose about one-third the distance 
to the cross vein; fourth vein usually without but sometimes with 
a very short apical spur or fold; apical cell open and ending 
before apex of wing by one and one-half times the length of sixth 
costal section; upper squamal lobe hyaline white; lower squamal 
lobe with long white hairs anteriorly and in the depression, and 
usually white, rarely brownish, or occasionally yellowish. 
Abdomen bluish green, sometimes purplish, rarely metallic 
yellow green or bronze; hind margins of segments with purple 
reflections and rather shining; with a narrow shining middorsal 
longitudinal stripe, the pattern more or less fixed; with silvery 
whitish pollen; fourth segment laterally and edges of tergites 
ventrally strongly pollinose. 
First genital segment black, with metallic greenish luster 
and occasionally silvery pollinose, with scattered setae, and with- 
out a defined marginal row of bristles; second segment smaller, 
dark orange brown to black, with scattered setae. Internal 
features (pl. 18, A and B) as illustrated. ; 
Female. Head (pl. 2, B) length at vibrissa greater than at 
antenna in proportion of 5.5:6.7; width, 13.9; height, 10.8; eye 
height 8.0; bucca 0.30 of eye height; front at vertex 0.28 of head 
width, 0.38 at lunule, gradually widening from the narrowest 
part (at vertex) toward the lunule; frontale 0.56 of frontal 
* width at vertex and narrowing to 0.41 of frontal width toward 
the lunule, with numerous scattered interfrontal setae; frontal 
bristles not shorter posteriorly; outer vertical bristles divaricate 
and almost as long as inner; frontoorbital bristles one reclinate 
and usually two proclinate; ocellar bristles almost divaricate, 
and often followed by several shorter divaricate bristles; third 
segment of antenna 2.9 times as long as second; palpus 2.3 in 
length; back of head bulging and slightly flattened, but less so 
than in male. Abdomen laterally on fourth segment with well- 
defined silvery pollinose areas which are visible from above. Wing 
with basicostal seale yellow orange to orange brown. Otherwise 
similar to male except for normal sexual differences. 
Length. 6-9 mm. 
