710 Annals of the South African Museum. 



(6) 7. Abdomen with a thin, not dense and whitish pubescence-; dorsum of 



epinotum a trapezoid, at least one and a half times wider behind than 



at the base, not excavated .... Mayri, Forel. 



(5) 8. Petiole with a scale. 



(10) 9. Larger species, 2J_, 8-5 mm. Dorsum of epinotum only slightly depressed 



in the middle of its apical margin ; the latter rounded, the declivity flat 



from above to below .... epinotalis, Santschi. 



(9) 10. Smaller species, 2J., 6-2 mm. Dorsum of epinotum concave from side to 



side, its apical margin deeply emarginate in the middle, the declivity 



concave from above to below, so that its brow overhangs the lower part 



Brcmnsi, Mayr. 

 (4) 11. Dorsum of epinotum less distinctly margined at the sides; sculpture of 

 the head and thorax very finely reticulate-rugulose, shining 



vividus, Smith, race reginae, Forel. 

 (1) 12. The junction of the dorsum of the epinotum with the sides and declivity 

 rounded, the upper half of the sides and declivity not vertical. 

 (14) 13. Dorsum of epinotum subquadrate ; petiole with a scale ; body more or 

 less shining, the sculpture feeble, the clypeus unarmed 



Barbarossa, Emery, race arminius, var. bicontracta, Forel. 



(13) 14. Dorsum of epinotum subglobose ; petiole with a node; body dull, 



sculpture very coarse : the anterior margin of the clypeus with 5 acute 



teeth ....... Dofleini, Forel. 



C. sericeus, Fab. (Plate IX, figs. 137, 137ah 



Suppl. Ent, System, p. 279, & 1798. 



Mayr, Vert. Zool. Bot, Ges. Wien, vol. 16, p. 886, ?, 1866. 



Jerdon, (F. cinerascens), Madras Journ. Litt. Sc., vol. 17, 

 p. 123, & 1851. 



2J., 8-10 mm. Black, basal third of trie scape and the flagellum 

 dark brownish red. Head and thorax dull, very sharply and evenly 

 reticulate- punctate, the reticulations sharply defined, the dorsum of 

 the epinotum less strongly sculptured than the rest of the thorax, 

 the petiole dull and more or less coarsely reticulate-rugose, the 

 abdomen slightly shining, transversely rugulose or shagreened, the 

 sculpture somewhat masked by the pubescence. Pilosity pale yellow- 

 ish, long, thin and erect, fairly sparse on the head, a little more 

 plentiful on the thorax, more so on the petiole and abdomen, but 

 nevertheless fairly sparse everywhere. Legs slightly shining, the 

 middle and hind pairs with a dense, black and almost decumbent 

 pilosity. Pubescence short and very scanty on the head, excepting 

 the clypeus, and on the pro-mesonotuin, fairly long and of a pale 



