g PROCEEDINGS OF THE NATIONAL MUSEUM vol.76 



parafacials bare, wide, about half as wide as cypleus, which is flat, 

 a little projecting below, and with a mere trace of a carina above; 

 cheek fully equal to half the eye height; facial ridge with a few 

 coarse hairs above vibrissae; palpi normal, proboscis short, the por- 

 tion beyond the elbow hardly longer than height of cheek; third 

 antennal joint about twice the second, arista pubescent, the basal 

 joints short. Anterior acrostichals well developed ; discal abdominal 

 present. Bend of fourth vein a little angular, first posterior cell 

 more widely open than usual, distinctly before the wing tip. 

 GeTiotype. — Callotroxis edwardsiy new species. 



CALLOTROXIS EDWARDSI, new species 



Male. — Front at narrowest part 0.19 of head width; head with 

 dense cinereous pollen on paraf rontals, parafacials, clypeus and orbit ; 

 the cheek broadly reddish in front; palpi red or brownish, tips 

 darker ; antennae black, base of third joint red ; beard mostly dark. 



Dorsum of thorax with rather striking white pollen forming a 

 broad margin on each side, the central part shining black but some- 

 what dissected by indistinct and varying white pollen. When viewed 

 from in front two stripes of pale pollen within the dorsocentral 

 rows extend to the suture and begin again some distance behind and 

 extend to the scutellum. In some angles these marks tend to dis- 

 appear, the general effect being of a large blackish central spot on 

 mesonotum. Scutellum red with thin white pollen. Chaetotaxy: 

 Acrostichal 3, 3; dorsocentral 3, 3-4; humeral 4; notopleural 2 (with 

 a few long hairs) ; posthumeral 1; presutural 1; supraalar 3; intra- 

 alar 3; postalar 2; sternopleural 2, 1; scutellum with two lateral 

 and an equally long apical slightly decussate and a small hair-like 

 pair of discals. 



Abdomen rather slender, black in ground color, with a conspicu- 

 ous large elongate reddish spot on each side occupying most of the 

 first to third segments so that the intermediate black portion de- 

 creases in width and may almost disappear on the third segment; 

 first segment with a pair of median marginal bristles; second seg- 

 ment with a pair of median marginals and three pairs of discals, one 

 before the other, and mixed with numerous very erect bristly hairs, 

 which do not occur except on the middle region ; third segment with 

 the same kind of discals and bristly hairs but with a marginal row of 

 about ten; fourth segment with bristles and erect bristly hairs over 

 the whole dorsal surface; the fifth segment (a narrow intermediate 

 space preceding the two genital segments) densely covered with 

 erect small bristles, rather striking. The red portion is covered 

 with rather brilliant white pollen matching that on the thorax so 

 that the pattern is quite striking; fourth segment more or loss 



