102 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 93 



and posterior orbit dark-smoky-silver pollinose; third antennal seg- 

 ment a little less than three times as long as second ; arista tapering, 

 slightly thickened on basal half, penultimate segment short; palpus 

 yellow, infuscated at base, thickened and curved at tip. thickly beset 

 with short black hairs which are longer toward base. 



Thorax black, with a bluish tinge and covered with gray pollen; 

 midtibia bearing 3 long bristles on anterolateral side, upper bristle 

 nearly as strong as middle, lower not much smaller than upper, 1 

 smaller bristle about one-half size of upper bristle situated between 

 it and middle bristle ; hind tibia ciliate. 



Abdomen with second segment having a faintly reddish spot on 

 sides; third abdominal segment with a dense patch of hairs under- 

 neath on each side. 



Length 10 mm. 



Female (allotype). — Head with front at narrowest slightly less 

 than one-third width of head ; frontal bristles eight in number besides 

 reclinate prevertical bristle; two pairs of proclinate fronto-orbital 

 bristles; outer vertical present. Additional bristles on midtibia 

 situated between normal three; pulvilli less than one-half length of 

 those of male. Third abdominal segment lacking dense patch of 

 hairs underneath on each side; sides of abdomen black. Otherwise 

 description same as for male. 



Length 9 mm. 



The para type material varies as follows from the descriptions: 

 The frontal bristles in the male vary from 10 to 11 and in female 

 from 7 to 9; the front in the male is 0.26 and 0.27 (in two specimens), 

 the front in the female is 0.30 (in two specimens). The middle tibia 

 usually has only three bristles on the anterolateral side, but some of 

 larger specimens, especially females, have additional ones. In the 

 male the reddish spot on the sides of the abdomen usually covers 

 portions of the second and third segments. 



Length 8 to 11 mm. 



Puparhtm. — Large, subshining, dark rufescent brown. Spiracles 

 shining black, slightly raised above the surface, separation space 

 about equal to width of one plate. Above, between and below the 

 spiracles, a prominent, ridgelike elevation much higher than stigmal 

 plates, the elevation above crescent shaped and descending slightly 

 on outer sides of stigmal plates. Each plate has three serpentine, 

 yellowish spiracular entrances. Button large, round, well defined, 

 centrally located on plate, spiracular entrances coming around on 

 inner side. Anal opening comparatively small, far below the spir- 

 acles. Spiracles located about on longitudinal axis. 



Length 8.5 mm., diameter 4 mm. 



