26 



PROCEEDINGS OF THE NATIONAL MUSEUM 



its diameter from eye; anteclypeus slightly wider apically, equal to or 

 slightly exceeding gena; postclypeal sutm-es parallel above antennal 

 pits; pronotum three times as long as vertex; hind femoral chaetotaxy 

 2-2-1 ; female with posterior margin of abdominal sternum VII trun- 

 cate apicaUy, posteroventral margins oblique. 



Male pygofer Avith less than 15 setae, deeply incised in apical half 

 of dorsal margin, ventral margin broadly produced; plates broadly 

 triangular, not constricted apically, extending posteriorly as far as 

 pygofer apex; connective not expanded apically, truncate, approxi- 

 mately equal in length to style, stem longer than arms, angle between 

 arms rounded; style Avith preapical lobe rounded, apical extension 



Figure 15. — B. obunca: a, aedeagus, lateral view; b, style and connective, dorsal view; 

 c, male pygofer, lateral view; d, valve and plate, ventral view; e, female abdominal sternum 

 VII, ventral view. 



strongly curved laterally, rounded apicaUy; aedeagus robust basally, 

 preatrium conspicuous, dorsal apodeme short and rounded, shaft 

 slender, curved dorsally. 



Color light to dark brown; face without oblique brown lines; pro- 

 notum commonly with longitudinal orange or brown lines, scutellum 

 Avith orange areas; thoracic venter not dark; fore wings hyaline with 

 brown tint. 



