142 STKPITTD.T-:. 



diagnosis of whicli, based on a $ from the Congo, was given by me 

 in 1908. To separate C. congolensis from C. brumieipennis is not 

 altogether easy, but the following are the distinctive characters : 

 (1) the black costal border of the wings does not extend beyond the 

 third longitudinal vein ; (2) the face is of a pale yellow colour, 

 with two thin brown lines forming a median band, which is some- 

 what dilated towards the middle; (3) there is no A -shaped strips 

 on the face. The antennae and legs, however, are reddish as in 

 brunneipennis, and the hind femora are also without the yellow 

 spot on the upper side. As Prof. Herve-Ba/in has only described 

 the male (from Katanga), I will give here some notes on the 

 female. 



Face very produced beneath ; frons in front grey-dusted towards 

 the middle ; antennal petiole blackish brown above and reddish 

 below ; all three antennal joints of almost equal length ; occipital 

 border at vertex very prominent, but narrow. Abdomen entirely 

 similar to that of the male, with a very long stalk and the distal 

 portion expanded into an oval. 



Type $ , a single specimen from Uganda Protectorate, Doro or 

 Durro Forest, Toro, 4,000-4,500 ft., 25-29. x. 1911 (8. A. Neavr). 



145. Cerioides bezzii, Herve-Bazin (1913). 



A small, short, very peculiar species, readily distinguishable owing 

 to its sessile antennae, to the singular venation and characteristic 

 pattern of the wings, and to the abdominal club being rounded. It 

 is very probable that the present species is the same as C. divi&a, 

 Walker. 



A single female specimen from Salisbury, Mashonaland ( G. A. K. 

 Marshall) ; the type is from Elisabethville, Katanga. 



Var. marginalia, var. n. 



$ . Length of body 11 mm. 



Coloration as in the preceding, but the yellow hind borders of 

 the abdominal segments are broader ; the hind femora have scarcely 

 any yellow at the base ; the wings have the costal border entirely 

 dark brown, fr,om the base of the marginal cell to the apex of 

 the wing. 



Type $ , a single specimen from Uganda Protectorate, Budongo 

 Forest, Unyoro, 3,400 ft., 11-15. xii. 1911 (S. A. Neave). 



In these two forms (bezzii and marginalia) the vena spuria is thin, 

 but strongly chitinized and deep black ; the first abdominal segment 

 shows at the base, in front of the halteres, two distinct but short 

 spines, one on each side, which are less developed in the species of 

 the first group. 



