44 SYIU'HIILE. 



a complete fringe of rigid and glittering yellowish hair. Thorax 

 wholly yellow, with only three parallel black stripes in the centre; 

 the yellowish- grey erect hair on the back and scutellum is 

 thick and twice as long as in picta. Squamulae and halteres as 

 in picta. Abdomen shaped as in picta ; it is wholly yellow, 

 with a black ring at the end of the second segment, a black 

 longitudinal stripe from the base of the third segment to the end 

 of the abdomen, and a short oblique black streak on the hind 

 corners of the third and fourth segments ; hair rather long, that 

 on the spatulate portion also long and dark. Legs with the coxse 

 entirely pale yellow, without any dark marking. Wings as broad 

 as in picta and of similar shape ; third vein only slightly sinuous, 

 and the seventh likewise, the anal cell therefore almost regular at 

 the apex ; wings yellow from the base to the small cross- vein, 



Fig. 8. Baccha graliami, sp. n. $ . X 5. 



leaving the alula and the hind border of the axillary cell almost 

 hyaline ; the median brown band begins at the fore border a 

 little before the end of the auxiliary vein and goes perpendicularly 

 to the hind margin, where it ends at the apex of the third posterior 

 cell ; subcostal cell filled up with brown to the extreme end ; apical 

 brown band running from the end of the first to the end of the 

 fourth vein ; the hind border of the wings is infuscated from the 

 tip to the end of the axillary cell. The veins are black, but yellow 

 in the vellow portions of the wing. 



Type $ and another specimen from Obuasi, Ashanti, vi.-viii. 

 1907 {Dr. W. M. Graham}. Named in honour of the collector, 

 who has discovered so many interesting new species of West African 

 Diptera. 



38. Baccha helva, sp. n. 



$ . Length of body 13 mm., of wing 11 mm. 

 Near picta, but more robust, without black stripes on the thorax. 



