176 THE BLOWFLIES oF NortH AMERICA 
parafaciale with gray pollen; faciale with three or four,rows 
of setae; palpus 4.0 in length, yellow orange; third antennal 
segment orange brown to black, 2.2 times as long as second; arista 
black, with black plumosity; back of head with one well-defined 
row of postocular cilia and three or four scattered rows, and 
with sparse whitish hairs of medium length. 
Thorax blue green lustrous black, without pollinosity, and 
with darker dull black longitudinal stripes on dorsal prothorax 
which extend but slightly beyond suture; pleura shining; pro- 
pleuron with dark hair in center; hindmost predorsocentral 
bristles placed 1.0 before suture; postacrostichal bristles and 
postdorsocentral bristles with only prescutellars strong; meso- 
thoracic spiracle with some long black setae; scutellum with the — 
under surface with very fine white hair and only the basal and 
angular lateral bristles strong. 
Legs black and shining; fore tibia with a complete dorsal row 
of bristles; middle femur with three or four anterior bristles 
near middle, a row of short fine anteroventral bristles on apical 
half, one long thin ventral bristle near middle, and scattered fine 
posteroventral bristles, usually one slightly before middle, one 
slightly beyond middle and often one near basal third (a pre- 
apical bristle might be considered to belong in the row), one 
posterior bristle near apical fourth, and two posterodorsal 
bristles, one near basal fourth and one slightly beyond middle; 
hind femur with seattered dorsal, anterodorsal, and anterior 
bristles, complete anteroventral and ventral rows, and with seat- 
tered posteroventral bristles; hind tibia with a complete antero- 
dorsal row, with three anteroventral bristles, the first near 
middle, the third near apical fourth, and with two posterodorsal 
bristles near middle. 
Wing (pl. 9, G) hyaline, slightly infuscated basally; costal 
sections 2 to 6 in the proportion 60:53:108:41:47; subcostal 
sclerite brownish black; third vein setulose for 0.40 the distance 
toward the anterior cross vein; fourth vein usually without but 
sometimes with a very short fold at angle; upper squamal lobe 
brown, with black setae below; lower squamal lobe brown. 
Abdomen shining, dark bluish green to black tending toward 
dark greenish blue or purplish in certain lights. 
Genital segments with internal anatomical features (pl. 20, 
E and F) as illustrated. 
Female. Bucea 0.33 eye height; pues 0.6 frontal width; 
front at narrowest 0.87 head width, 0.37 at vertex and 0.44 at 
antennal base; outer vertical bristles two-thirds as long as inner; 
frontoorbital bristles two of medium size, both proclinate; ocellar 
