48 STHPHTDJE. 



Head black ; occiput with dark grey dusting, whitish on the 

 sides below, and with the usual fringe of yellowish, rigid hairs; 

 vertical triangle black, short and very narrow, black-haired ; frontal 

 triangle aeneous, with some dark hairs above and on the sides ; 

 frontal tubercle rounded, prominent, violet-coloured, shining purple 

 on the sides, with a semicircular depression above ; face shining 

 aeneous above and towards the middle, grey-dusted on the sides, 

 yellowish below, the sides of the buccal cavity and the peristoma 

 yellow, this last black behind ; antennae dark luteous, the third joint 

 short-oval ; eyes with the middle brown band only, touching along 

 a line which is a little longer than the vertical triangle. Thorax 

 aeneous, without yellow markings, punctate, not very shining, clothed 

 with depressed golden hairs ; pleurae more shining, with longer 

 golden hairs on the mesopleurae ; scutellum wholly aeneous, punctate, 

 with very short and sparse hairs. Squamulae yellowish, with a short 

 fringe ; halteres yellowish. Abdomen long and slender, almost 

 linear ; the hairs on the sides of the stalk are erect and yellowish, 

 of medium length, the others are short and darker ; first segment 

 aeneous in the middle, yellowish on the sides ; second entirely 

 shining black, cylindrical, as long as the third ; third and fourth 

 at the base each with two ill-defined yellowish spots, which are 

 bifid behind ; fifth entirely black ; genitalia shining aeneous, pale- 

 haired ; venter black, in the middle of the third and fourth seg- 

 ments there is a yellow spot, which is bifid behind. The four front 

 legs and the front coxae are yellow, the tarsi alone being darkened 

 at the tip ; hind femora yellow, with a broad preapical black ring ; 

 hind tibiae blackish, with broad yellow base ; hind tarsi blackish, 

 the first joint yellowish. Wings of normal size, evenly infuscated 

 with a yellowish-brown tinge, which is a little paler on the hind 

 border near the base ; fore border blackish in the costal, mar- 

 ginal, and end of submarginal cells to the end of the third vein ; 

 subcostal cell and stigma black ; third vein rather sinuous ; seventh 

 vein bent up at the end, and therefore the shape of the anal cell 

 is like that in the broad-winged species, but not so accentuated. 

 The peculiar fleck at the end of the second basal cell is more 

 conspicuous than usual in the clear- winged species ; from this fleck 

 issues, as in the other species, a vein-like fold which divides the 

 upper cross- vein between the second basal and the discal cells. 



Type d , a single specimen from Obuasi, Ashanti, 8. xi. 1907 

 (Dr. W. M. Graham). 



42. Baccha sapphirina, Wiedemann (1830). 



A black species, easily distinguished by the bright orange 

 antennae, by the shining bluish transverse abdominal bands, and by 

 the pure hyaline wings, which bear a black stigma and a black 

 apical spot. 



B.favicorHts, Loew (1.S03), and B. punctual. Bigot (1883), 

 are certainly identical with the present species; in ]908 I used 

 the former name in recording the species from Krythr;ea. Hut. 



