SUBFAMILY CHRYSOMYINAE 163 
parafaciale with gray pollen and with hair of medium length 
scattered above; palpus 3.0 in length, yellow orange; third 
antennal segment three times as long as second, yellow orange to 
brown; arista black, with long black plumosity; back of head 
black, silvery, with two rows of postocular cilia and abundant 
short whitish hairs. . 
Thorax black with metallic bluish-green luster, with thin 
silvery pollen anteriorly just behind head and with darker black 
longitudinal stripes on dorsum extending slightly beyond suture; 
pleura mostly shining; humeral bristles of moderate length; pro- 
pleuron with whitish-yellow hairs; propleural. bristles moderately 
strong; preacrostichal bristles weak to strong, the hindmost one 
placed anterior to suture by 1.5; postacrostichal and postdorso- 
eentral bristles differentiated mainly in the prescutellars; meso- 
thoracic spiracle with bright orange hair; metathoracic spiracle 
with dark yellowish brown hair, the anterior edge with black 
hair; scutellum with minute subapical discal bristles which 
simulate apicals, and the under surface with fine, short, scattered, 
whitish hairs. 
Legs black, shining; fore tibia with a complete dorsal row of 
bristles and without a posterodorsal row; middle femur with two 
anterior bristles near middle, one anteroventral bristle at basal 
fourth, without long hair ventrally, and with four anterodorsal 
bristles toward basal third; middle tibia with two posterior 
bristles, one at basal fourth, one near middle, and one postero- 
dorsal bristle near middle; hind femur with complete antero- 
dorsal and anteroventral rows of bristles and three long ventral 
basal bristles; hind tibia with incomplete anterodorsal row of 
bristles, the row better defined and the bristles set closer together 
toward base, two anteroventral bristles, one near middle, the 
other near apical fourth, and three posterodorsal bristles, one 
near basal fourth, one near middle, and one near apical fourth. 
Wing (pl. 9, E) hyaline, shghtly infuscated toward base; 
costal sections 2 to 6 in the proportion 80:60 :95-100 :30:8; sub- 
costal sclerite orange brown to black; remigium basally below 
with fine orange-colored pile and with some black cilia; third 
vein setulose almost one-half the distance to cross vein; fourth 
vein usually without, but sometimes with, a very short fold at 
bend; upper squamal lobe usually hyaline but sometimes yellow- 
ish white; lower squamal lobe yellowish white. 
Abdomen slightly olivaceous or bluish green to black, shining. 
Genital segments greenish black, with scattered erect black 
hairs. Internal anatomical features (pl. 19, I and J) as illu- 
trated. | 
