646 Annals of the South African Museum. 



Race Empedocles, var. diabolus, Forel. 



(as race of natalensis, Smith), Bull. Soc. Vaud. S"c. Nat., 

 vol. 16, p. 81, §, 1879. 



Of. 12 mm. Like the type of the race in general, hut the head 

 is subopaque, and the posterior margin much more deeply concave, 

 the occipital lobes acutely angular (less than 90°), projecting far 

 beyond the apex of the emargination. The lobes are one-sixth the 

 length of the head, and when seen direct from above, project back- 

 wards like cones to a point level with the middle of the pronotum. 



y minor, 8 mm. Like the § minor of Empedocles but with the 

 head duller, not narrowed anteriorly, if anything a little wider in 

 front than behind, the posterior margin moderately concave. 



Salisbury, S. Rhodesia, (R. L. Thompson). 



This form represents the extreme point of development in the 

 degree of angularity and prominence of the occipital lobes. In Tholes 

 the lobes are subrectangular and only slightly projecting, more so 

 and rectangular in Empedocles. 



It is not without some hesitation that I have assigned these spe- 

 cimens from Salisbury to diabolus Forel, since the latter taken at 

 Lessouto, 0. F. S. was described as a race of natalensis. However in 

 his recent review of the genus, Forel gives diabolus specific rank. 

 The Rhodesian specimens agree very closely with Forel's description, 

 but unfortunately he gave no information as to the length of the 

 scapes, which in these specimens are much too short to admit of 

 any close relationship to natalensis. Moreover, the latter is a dull 

 insect, which diabolus certainly is not. 



(G.A. coll.). 



Race congolensis, Emery. 

 Ann. Soc. Ent. Belg., vol. 43, p. 499, % & 9. 1899. 



9|. 13. mm. Piceous, almost black, the legs dark brown, the 

 flagellum, tarsi and coxae reddish or yellowish brown. Dull, but 

 with a slight greasy gloss, more pronounced on the abdomen than 

 elsewhere. Pubescence scanty and very short, a little more abundant 

 on the legs; pilosity thin, yellowish and sparse everywhere. Sculp- 

 ture stronger than in maculatus i. sp., the sides of the head distinctly 

 reticulate. Head very much like that of Empedocles, the occipital 

 lobes similar. The scape falls short of the occipital margin by as 

 much as the length of the 1st joint of the flagellum. Clypeus carinate, 

 the anterior corners of its lobe rectangular. Mandibles less strongly 



