SUBFAMILY CALLIPHORINAE 315 
and base of third orange; third segment 4.5 times as long as 
second, reaching three-fourths the distance to the vibrissae; 
arista brownish black, with long black cilia both above and 
below for two-thirds its length; back of head flat, black, with 
Silvery pollen, with two rows, and a partial third, of postocular 
cilia and with abundant tawny or reddish orange hair. 
Thorax blue black with thin silvery-whitish pollen and with 
black longitudinal dorsal stripes which extend to the scutellar 
suture; pleura with silvery pollen; humeral bristles three in a 
row, and a fourth slightly anterior to these; preintraalar bristles 
three, the hindmost placed 1.0 before the suture; preacrostichal 
bristles two, the posterior one 3.0 before the suture; predorso- 
central bristles three, the hindmost 1.6 before the suture; rim of 
postparapteron with fine tawny pile; greater ampulla orange 
brown with fine whitish pile; postacrostichal bristles and post- 
dorsocentral bristles three; postintraalar bristles two; post- 
supraalar bristles three, with sometimes a weak fourth; meso- 
thoracic spiracle with yellowish orange to brown pile; meta- 
thoracic spiracle dark brown; scutellum usually concolorous with 
thorax but sometimes with apex rather reddish, discal bristle 
one, with sometimes a weaker bristle laterally, lateral bristles 
four strong, and usually one or two weak; lateral postscutellar 
plates with tufts of short black setae. 
Legs black; middle femur with two anterior bristles near 
middle; middle tibia usually with four anterodorsal bristles, one 
at basal fourth, one near middle, one near apical third and one 
near apex (sometimes with only two or three bristles), two ven- 
tral bristles, one near middle and a stronger bristle just apical 
to it, and two or three posterior bristles, always one at basal 
fourth and one at apical fourth, and sometimes one near middle, 
and one or two posterodorsal bristles, always one at apical fourth 
and sometimes one near middle; hind tibia with two or three 
anterodorsal bristles, one near basal fourth, one near middle, 
and rarely with one at apical third, two anteroventral bristles, 
one at apical third and one at apical fourth, and two or three 
posterodorsal bristles, one at basal fourth, one sometimes near 
basal third, and one at apical third. 
Wing hyaline, infuseate toward base; costal sections 2 to 6 
in the proportions 95:75 :132 :42 :12; subcostal sclerite yellow to 
yellow orange, with whitish yellow pile; basicosta black; fourth 
vein entering costa 1.5 before wing apex; upper and lower 
squamal lobes brown, rim on former dark brown, rim on lower 
lobe hght brown. 
Abdomen bluish, mostly shining, but with silvery white pollen, 
