SUBFAMILY CHRYSOMYINAB si 141 
row of bristles not very well-defined above, extending anteriorly 
to the base of the first antennal segment and consisting of 13 or 
14 bristles, the rows moderately diverging as they follow the 
inner margin of the frontale; vertex subpollinose, black; elypeus 
gvolden; facial carina narrowly but distinctly separating antennal 
bases; parafaciale one- half clypeal width near middle, 1.2 wide 
opposite lunule, narrowed above, with golden pollen; faciale 
with a row of short black hairs which ascend about halfway to 
the antennal base; vibrissae above oral margin by 1.75 and 
separated by 1.7; palpus 1.6 in length, yellow orange, with black 
setae; antenna with first and second segments orange, third 
segment 2.8 times as long as second, yellow orange to orange 
brown; back of head with abundant whitish yellow medium- 
length hairs which become longer below. 
Thorax bluish green and metallic black, with pieeish luster, 
with pollen which appears whitish silvery in certain lights, eon- 
spicuously so anteriorly, and with three black longitudinal 
stripes on dorsum which do not extend beyond seutellar suture; 
pleura shining or lightly silvery; propleuron with whitish pile; 
no bristles on dorsum anterior to suture except one or two pre- 
supraalars; if two, then the anterior one usually weak; meso- 
pleuron with uniformly scattered whitish hair on posterior 
margins; sternopleuron with well distributed whitish hair on 
posterior three-fourths; hypopleuron bare except on posterior 
margin; pteropleuron with uniformly distributed black hair on 
posterior half; prosternum with scattered white hairs; postalar 
wall with tuft of black setae; preparapteron orange brown, with 
fine whitish decumbent pile; preepaulet black, setose; tympanic 
pit. with several long white hairs; sclerites at wing base black; 
sreater ampulla with a green luster and with short fine decum- 
bent whitish pile; only prescutellar bristles of the postacrostichal 
series strong; shorter.pair often immediately before these; post- | 
dorsocentral bristles two, only the presecutellar strong; meso- 
thoracic spiracle rather large, its flap with whitish yellow 
hair; metathoracie spiracle small, with dark brown hair; halteres 
orange; lateral postscutellar plates with fine whitish hairs; 
under surface of seutellum laterally with fine whitish pile. 
Legs orange brown to dark brown; coxae orange brown to 
black with a greenish-metallic luster; anterior femur usually 
dark reddish brown basally; anterior tibia usually orange red 
and with about four short bristles dorsally; middle femur 
usually dark reddish brown and with from one to three bristles 
anteriorly near middle, middle tibia usually orange red, with 
one ventral bristle near middle and two posteroventral bristles; 
