﻿220 PROCEEDINGS OF THE NATIONAL MUSEUM vol. lOO 



dark, index 3. Comb scales in an irregular single row, 6 to 11 in 

 number. 



Description of male. — ^Wing : 3-4 mm. 



Head: Proboscis 1.2 as long as front femur, slightly shorter than 

 abdomen, dark-scaled; labella lighter. Palpi approximately 0.23 of 

 proboscis, dark-scaled; terminal segments simple, without conspicu- 

 ous hairs. Clypeus dark brown, bare. Antenna 0.80 of proboscis; 

 torus dark brown, with minute light hairs ; flagellar whorls scanty ; last 

 two segments elongate, with denser pubescence, penultimate equal to 

 three preceding segments, terminal 1.5 as long as penultimate. Vertex 

 clothed with broad, appressed, dark scales except for a narrow light 

 line along eye margins and a pair of lateral white-scaled patches ; erect 

 occipital scales short, white in the center, dark laterally. 



Thorax: Scutal integument dark brown, thick shaggy vestiture of 

 mixed broad and rather narrow curved, appressed, dark bronzy scales, 

 a few narrow white scales on anterior promontory ; dorsocentral and 

 acrostichal bristles absent, prescutellar bristles usually two to four 

 pairs, numerous bristles on anterior promontory and supra-alar areas, 

 all bristles dark brown. Scutellum dark, completely covered with 

 very broad, appressed, flat, dark, bronzy scales; bristles dark brown. 

 Postnotum brown, darker centrally ; two to four minute hairs usually 

 present on lower central portion. Pleural integument rather light 

 brown, less heavily sclerotized areas tan; upper part of propleuron, 

 lower anterior part of sternopleuron, middle posterior part of meso- 

 pleuron, meron and metameron bare ; pronotal lobe light-scaled basally, 

 with mixed dark and light scales on upper part; posterior pronotum 

 usually white-scaled on basal third only, the upper two-thirds dark- 

 scaled ; remainder of pleura completely covered with broad, appressed, 

 translucent, white scales. Pleural bristles : anterior pronotals four to 

 six dark bristles above and six to ten lighter, weaker bristles below ; 

 one dark posterior pronotal; spiraculars usually two or three dark 

 bristles ; propleurals four to six light hairs ; lower sternopleurals six 

 to eight light hairs ; one to three upper sternopleural hairs occasionally 

 present ; prealars three to six dark bristles ; upper mesepimerals ten 

 to twelve light hairs. Halteres light and bare on base and lower part 

 of stem, upper part of stem and knob dark-scaled. 



Wings: Scales all dark. Outstanding scales broad on all veins 

 dorsally, narrow on lower surface of veins 3 to 6. Bases of fork cells 

 approximately equidistant from wing base. Fringe mostly dark. 

 Squama fringed. 



Legs : All dark bronzy except for white-scaled coxae and trochanters 

 and conspicuously light-scaled ventral surfaces of all femora; lower 

 surface of all segments somewhat lighter. Enlarged claw of front 

 tarsus with a tooth near the middle, that of middle tarsus simple. 



