SUBFAMILY CHRYSOMYINAE 151 
teriorly and slightly downward; eye of medium size, elongate 
oval, set nearly straight in head; front very narrow in male, wide 
in female; with long and abundant hairs, not arranged in rows, 
situated outside of frontal row of bristles and extending an- 
teriorly to the middle of the parafaciale; frontal bristles vesti- 
gial posteriorly in male; outer vertical bristles absent in male, 
present in female; frontoorbital bristles absent in male, one re- 
clinate in female; ocellar bristles proclinate in male, almost ex- 
actly divaricate in female; clypeus about one and one-half times 
as long as wide, deeply concave; facial carina absent; parafaciale 
narrowed above, with numerous scattered hairs which are main- 
ly near eye; faciale slightly convex in profile, with short black 
setae in several rows which extend nearly to antennal base; vi- 
brissa above oral margin; palpus elongate clavate; antennal base 
somewhat below eye-middle when head is viewed in profile, the 
bases approximated; third segment of antenna reaching fully 
two-thirds the distance to the vibrissa; arista elongate, slightly 
thickened at base, and with long plumosity above, shorter be- 
low, for about four-fifths the distance to the apex; back of head, 
especially in male, flat or slightly coneave in profile, with one 
row of postocular cilia. 
Thorax with two humeral bristles; propleural bristles strong; 
preintraalar and preacrostichal bristles absent; predorsocentral 
bristles usually absent but sometimes the usual presutural a 
little larger than surrounding hairs; presupraalar bristle one; 
sternopleural pristles three; hypopleuron setose on posterior and 
dorsal margins; pteropleuron bare on anterior half; prosternum 
flat, large, narrow behind and widening rapidly anteriorly, se- 
tose; postalar declivity setose in center and anteriorly; tympanic 
pit with several long hairs; postacrostichal bristles two, and post- 
dorsocentral bristles two or three, only the prescutellars strong; 
intrapostsutural, postintraalar and intrapostsupraalar bristles 
absent; intrapostalar bristles differentiated; mesospiracular 
bristles one strong and two weak; metathoracic spiracle with long 
hair on anterior margin; scutellum with one discal bristle, under 
surface with fine hair; lateral postscutellar plates setose. 
Legs without fine pile on coxae but posterior coxa setose pos- 
teriorly; claws and pulvilli short; fore tibia with about five or 
six short black dorsal bristles and with one strong posteroventral 
bristle near apical third; middle femur with a long, well-defined 
row of posteroventral bristles; middle tibia with one antero- 
dorsal bristle near apical fourth, one ventral bristle near apical 
fourth, one or two posterior bristles, sometimes one near middle 
and always one at apical third, and one or two posterodorsal 
