6(3 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 93 



This species closely resembles Carcelia amplexa. The species is less 

 variable, and several small characters serve to differentiate it from G. 

 amplexa. It does not have the concolorous femora and tibiae. 



Male (type). — Head with front at its narrowest 0.22 head width; 

 frontal row of 11 bristles, extending from base of third antennal seg- 

 ment to three reclinate upper frontals (one reclinate upper frontal 

 and two preverticals) ; numerous fine hairs outside row of frontal 

 bristles ; facial ridge bristly on lowest one-fifth ; gena less than one- 

 fifteenth eye height; frontal orbit, face, cheek, and posterior orbit 

 silvery-gray pollinose with a tinge of black ; antenna black, third seg- 

 ment four times second; arista thickened on basal one-fourth, pen- 

 ultimate segment short; palpus yellow. 



Thorax black covered with gray pollen; five black mesonotal 

 vittae, median one obsolete before suture; four postsutural dorso- 

 central macrochaetae ; scutellum yellow covered with gray pollen, 

 three pairs of marginal scutellars and one smaller but strong decus- 

 sate pair turned backward ; disk covered with erect hairs and bearing 

 one pair of discal scutellars; two sternopleural macrochaetae; legs 

 with tarsi, femora, and coxae black; tibia yellow; fore tibia with 

 two median posterolateral bristles; midtibia with one anterolateral 

 bristle, one inner ventral bristle at least as long as and situated higher 

 on tibia toward femur than the lower of the two median postero- 

 lateral bristles ; hind tibia ciliate with one longer bristle near middle ; 

 wing grayish hyaline, third vein with two bristles at base; squamae 

 white. 



Abdomen covered with gray pollen except on dorsum of first seg- 

 ment and narrow vitta; although somewhat obscured by pollen, 

 ground color of sides reddish yellow on first, second, and third seg- 

 ments extending on to venter and dorsum somewhat; ground color 

 of dorsum and venter, including ventral membrane, and entire fourth 

 segment black; first and second segments with a pair and third with 

 a marginal row of macrochaetae ; no discals ; fourth segment covered 

 with erect bristles about one-half size of macrochaetae on third; 

 abdominal hairs erect 



Length 8 mm. 



Female (allotype). — Front at its narrowest 0.25 head width; six 

 frontal bristles on one side, seven on other, only two reclinate upper 

 frontal bristles (preverticals) ; hairs outside frontal row noticeable 

 but not quite so numerous as in male; two pairs of fronto-orbital 

 bristles; facial ridge bristly on lowest one-sixth; third segment of 

 antenna slightly less than four times second. Reddish-yellow area on 

 side of abdomen not so extensive as in male. The pulvilli one-half 

 length of those of male. Otherwise the description is the same as for 

 the male. 



