PROC. ENT. SOC. WASH., VOL. 23, NO. 1, JAN., 1921 23 



A NEW GENUS OF BOMBYLIIDAE (Diptera). 

 BY CHARLES T. GREENE, U. S, National Museum. 



This genus resembles P/oas but has only two submarginal cells 

 instead of three as in P/oas. In Williston's Manual it runs to 

 Sparnopolius but differs greatly in the antennae and shining 

 scutellum. 



Dr. J. McDunnough of Ottawa, Canada, called attention to 

 the wing having only two submarginal cells. 



Calopelta, n. gen. 



First joint of antennae dull gray, greatly enlarged on ventral, apical half; in 

 profile, dorsal surface nearly straight; with very long, black, bristly hairs, sparse 

 above, very thick below, especially dense towards apex on the ventral side; on 

 the upper, outer surface are a few much shorter, yellowish-brown hairs; second 

 joint dull gray, quite small, about as broad as long, faintly larger at apex than at 

 base, with a circlet of long, black bristles on the apical half; third joint flattened 

 dull black, slightly constricted near the base, broadest part at basal third from 

 there tapering towards the apex, at the apex is a small two jointed, black style; 

 first joint of style cylindrical about twice as long as its diameter, with small 

 hairs at the apex; second joint cylindrical and its length is about five times its 

 diameter. Thorax ashen gray covered with medium long yellow pile and very 

 numerous long black hairs around the entire edge. Scutellum shining black 

 with long yellow pile across the base and numerous long black hairs on the black 

 surface. Abdomen ashen gray covered with yellow pile which is longer on the 

 sides; apical edge of each segment and along the sides there are numerous long 

 black hairs; venter clothed principally with long, dense, yellowish white pile 

 with a few black hairs towards the apex. Tibiae with short, well defined black 

 bristles arranged in rows. Wings with only two submarginal cells. 



Calopelta fallax, n. sp. Genotype (Fig.). 



Male. Eyes holoptic; orbital cilia long, black; frontal triangle small, black 

 with a silvery dust. Face dull ashen gray with long black hairs above and whit- 

 ish below. Proboscis black, reaching to the apex of the first antennal joint; 

 palpi gray, nearly half the length of the proboscis, very slender with yellow hairs 

 below, apical tuft black. Legs black; femora with long, golden yellow, hair-like 

 scales lying flat and long, numerous, black hairs on under surface; tibiae with the 

 same yellow hair-like scales and short, black, spine-like bristles arranged in 

 rows; tarsi with a row of very fine black spines on under surface. Wings tinged 

 with brown especially on the costal edge and at the base; both hind cross-veins 

 with a faint cloud. Tegulae yellow with yellow fringe. Halteres yellow. 



Female. The same except as follows: Front broad, dull ashen gray with long 

 black hairs and a few yellow, shorter hairs transversely above the base of the 

 antennae. 



Described from five specimens. 

 Typejemale, Cat. No. 23086, U. S. N. M. 

 Ft. Garland, Colorado, June 8, 1883, Collection of C. V. 

 Riley. 



