EACCHA. 43 



stripe, extending from the humeri to the scutellum. The line of 

 contact of the eyes as long- as the very narrow vertical triangle ; 

 antennal tubercle less glittering violet. Abdomen black, with 

 yellowisli ill-deHned spots on the sides of the third and fourth 

 segments. Ocellar tubercle not prominent. 



One male and three females from Obuasi, Ashanti, vi.-viii. 1907 

 (Dr. W. 3L Graham). 



Yar. superpicta, var. n. 



$ . Length of body 10 to 11 mm., of wing 8 to 9 mm. 

 Very like females of the typical form, which have a reddish- 

 blaek striped abdomen, but the second segment showing always a 

 black ring at the apex. The frons has the same coloration and 

 similarly prominent antennal and ocellar tubercles, the antennal 

 one being violet-coloured, but narrowly yellow in front ; the eyes 

 seem to have only a middle brown band, as in the typical form. 

 The halteres have also a blackish club. Wings of the same shape 



Fig 1 . 7. Bacclta picta, var. superpicta, var. n. 

 Wing of $ . X 7. 



and coloration, but with the following two well-marked differences: 

 (1) there is another yellow stripe, which occupies all the base of 

 the anal cell and extends along the seventh vein to the middle of 

 the same cell, ending in a point ; (2) the hyaline preapical band is 

 verv narrow and short, ending before the hind lower corner of the 

 first posterior cell. The brown apical spot is therefore fused with 

 the brown middle band, not broadly separated as in the preceding 

 form. 



Type $ and three additional specimens from the same locality 

 and collector as the typical form, vii. ix. 1907. 



37. Baccha grahami, sp. n. 



2 . Length of body 9 to 10 mm., of wing 8 to 9 mm. 



A very elegant species near picta, but at once distinguished by 

 the very different wing-pattern, which is yellow basally, with a 

 broad median brown band, and hyaline apically, with a brown band 

 at the tip. 



Head as in picfft, both in shape and coloration ; antenna? orange- 

 yellow ; eyes apparently with a single brown band ; occiput bearing 



