SUBFAMILY CALLIPHORINAE 319 
or only slightly separated; third segment reaching nearly three- 
fourths the distance to the vibrissa; arista with penultimate 
segment about 1.5 times as long as diameter, apical segment 
elongate, thickened toward base and then uniformly attenuate 
to apex, with long cilia above and short cilia below on about 
the basal two-thirds; back of head flat or evenly rounded above 
and bulging below. 
Thorax with four humeral bristles arranged in an obtuse 
angle; propleural bristles one or two; posthumeral bristle 
present; preintraalar bristles two or three, the posterior bristle 
either present or absent; preacrostichal bristles one to three; 
predorsocentral bristles three; presupraalar bristle one; noto- 
pleural bristles two; sternopleural bristles usuaily three, these 
arranged 2 — 1; prosternum widening and bulging anteriorly, 
narrowed and setose posteriorly; postalar declivity in center 
with a tuft of black hairs; tympanic pit setose on upper posterior 
margin, the setae black; squamopleuron with short fine brown 
pubescence; postsupraalar bristles three; postalar bristles two 
or three; postacrostichal bristles three; postdorsocentral bristles 
three; postintraalar bristles two or three; spiracles as in Calli- 
phora; scutellum with two or three discal bristles (rarely four 
or one), and two or three (rarely four) lateral bristles. 
Legs with fore femur as in Calliphora; fore tibia with several 
anterodorsal bristles and with one or two posterior bristles; mid- 
femur with an anterior series of about six short bristles toward 
middle, four anteroventral bristles toward base and a postero- 
ventral row of about seven long bristles extending from base 
to apical fourth; hind femur with anterodorsal and anteroven- 
tral rows of bristles which are set rather closely together, and a 
ventral row of bristles which are spaced further apart; hind 
tibia with about three anterodorsal bristles, one or two antero- 
ventral bristles and three posterodorsal imadles, male claws 
elongate. oe 
Wing with a minute but distinct costal spine; anterior cross 
vein at middle of second section of fourth vein; upper squamal 
lobe rather small in comparison to lower; lower squamal lobe 
rounded, with brown pile on upper dise in middle. 
Abdomen rather conical in male, ovate in. female, ventral 
membrane somewhat exposed in female, not in male; second 
segment with weak marginal bristles which are erect in center 
of dorsum; third and fourth segments each with a row of strong 
and erect marginal bristles. : 
Genital segments rather small to medium in size, fifth sternite 
large but not protruding ventrally. 
