336 THE BLOWFLIES OF NortTH AMERICA 
pit and ridge bare; squamal process long setose; postacrostichal 
bristles one; postdorsocentral bristles three; postintraalar bristles 
two, postsupraalar bristles three strong and one weak; scutellum 
with one discal bristle and three lateral bristles; under surface 
of scutellum laterally setose. 
Legs with anterior femur having dorsal, posterodorsal, and 
posteroventral rows of long bristles, the posterior surface with 
considerable long hair; anterior tibia with several dorsal or 
anterodorsal bristles in a row, and one or two long posterior 
bristles, usually one near middle and one near apical third; mid- 
dle femur with one anterior bristle near middle (often with a 
weaker bristle just basally), and with ventral and posteroventral 
rows of long shaggy bristles; middle tibia with two anterodorsal 
bristles, one at basal third and one at apical third (often a weak 
bristle at basal fourth), three posterior bristles, one at basal 
sixth, one at basal third and one at apical third, and one postero- 
dorsal bristle toward middle; hind femur with anterodorsal row 
of long closely-set bristles, and anteroventral and ventral rows 
of long and shaggy bristles; hind tibia with four anterodorsal 
bristles, one near base, one at basal fourth, one at basal third, 
and one toward apical third, two anteroventral bristles, one at 
or near middle, and one at apical third (often two weaker bristles 
basad of these), and two posterodorsal bristles, one at basal 
fourth and one near middle (sometimes a weak bristle between 
these); claws and pulvilli of male long and strong, shorter in — 
female than in male. 
Wing with strong costal spine, third vein with only two or 
three setulae at base; no apical section or fold at bend of fourth 
vein which has an angle of nearly 90 degrees; apical cell clearly 
open and ending considerably before wing apex; anterior cross 
vein at middle of second section of fourth vein, oblique; posterior 
cross vein doubly arcuate; last section of fifth vein one-fifth as 
long as preceding section; upper squamal lobe small, bare; lower 
squamal lobe large, hind margin wide and truncate. 
Abdomen elongate-conical in male, elongate-oval in female; 
entirely shining, only faint traces of pollen; ventrally with long 
hair; first and second segments with lateral bristles only; third 
and fourth segments each with a row of marginal bristles; dis- 
eal bristles on fourth segment, these hair-like in male, strong 
and erect in female; first sternite twice as wide as long in male, 
the following sternites successively wider, the fourth at least. 
three times as wide as long. F 
Genital segments of male from medium to large in size, second 
segment narrow and twice as long as first. 
