HENRY J. FRANKLIN. 467 



pile and visually with considerable yellow on the sides of the fifth, the 

 remainder being dark. Venter aud legs dark. 



Male. — Face dark ; occiput with more or less yellow pile ; dorsutn of 

 thorax entirely yellow, or with an indefinite black interalar band, or 

 with the whole hind portion with mostly dark pile ; the upper parts of 

 the pleura yellow, the lower parts being either dark or yellow ; dorsum 

 of abdomen colored much like that of the female, but with the first seg- 

 ment and the extreme sides of the sixth usually bearing yellow pile. 



Female. Head. — Face entirely dark ; occiput usually entirely dark, 

 but sometimes with a slight sprinkling of yellow hairs; cheeks dark. 

 Malar space shorter than its width at the apex, about one-fifth as long 

 as the eye. Clypeus, for the most part, densely and rather coarsely 

 punctate. Flagellum of antenna about one and four-fifths times as 

 long as the scape ; third antennal segment somewhat longer than the 

 fifth, the fifth longer than the fourth. 



Thorax. — Dorsum sometimes entirely yellow, often yellow with only 

 a dark spot on the center of the disc, but often with the scutellum and 

 the region between the bases of the wings more or less dark, and some- 

 times entirely so ; the very center of the disc naked ; mesopleura with 

 their upper halves mostly or entirely yellow and their lower halves 

 dark ; metapleura and sides of the median segment mostly or entirely 

 dark, the former often with a little yellow pile. 



Abdomen. — Dorsum : segments one and two dark ; segment three 

 dark, but with yellow pile on its hind corners; segment four yellow ; 

 segment five black in the middle and with more or less yellow pile on 

 the sides ; segment six black, usually with brownish-ferruginous pubes- 

 cence running forward from the apex in a broad line on each side. 

 Venter mostly dark, with some yellow hairs on the sides of the middle 

 portion. Hypopygium with considerable brownish-ferruginous pubes- 

 cence on its apical portion ; the lateral elevations high and gradually 

 rounded over from front to rear. 



Wings. — Somewhat stained with brown ; the fore pair usually dark- 

 est in the region beyond the veins. 



Legs. — Black; the hind metatarsi with their posterior margins 

 strongly arcuated. 



Male. Head. — Face entirely black ; occiput always with a sprink- 

 ling of yellow hairs, and occasionally with a distinct triangular patch 

 of pure yellow pile; cheeks black. Malar space shorter than its width 

 at the apex, about one-fifth as long as the eye. Clypeus mostly 

 covered with black pile. Flagellum of antenna about three times as 

 long as the scape ; third and fifth antennal segments subequal in 

 length, the fourth distinctly shorter than either. 



Thorax. — Coloration in general much like that of the thorax of the 

 female and showing the same variations, but the scutellum more often 

 entirely yellow, it sometimes being yellow with the region between 



TRANS. AM. ENT. SOC, XXXVIII. 



