174 Annals of the South African Museum. 



(4). 5. Colour blackish; 4'5 mm. long . . . Andrei, Mayr. 



(3) . 6. Pronotum with anterior angles rounded ; ocelli rudimentary or absent. 



Small species . . . (sub-genus Tetraponera, Smith.) 



(14). 7. Colour black or brown, or, if yellow, head and thorax smooth and 



shining (var. durbanensis, Forel, S. clypeata). 



(9). 8. Clypeus angular in the middle . . . Penzigi, Mayr. 



(8). 9. Clypeus quadri- or quinque-dentate, or bicarinate and bidentate. 



(11). 10. Clypeus with two longitudinal carinae ending in minute teeth at the 



anterior margin. ..... Liengmei, Forel. 



(10). 11. Clypeus without longitudinal carinae. 



(13). 12. Clypeus quadri-dentate .... clypeata, Emery. 



(12). 13. Clypeus quinque-dentata, the median tooth small, much smaller than 

 the inner pair of teeth. . . clypeata, race Braunsi, Forel. 



(7). 14. Yellow or reddish yellow species; head and thorax not smooth and 

 shining. 

 (20). 15. Pronotum margined, at least laterally. 



(17). 16. Clypeus emarginate in the middle . . bifoveolata, Mayr. 



(16). 17. Clypeus not emarginate. 



(19). 18. Anterior margin of clypeus produced in the middle into a rectangular 

 lobe ....... ambigua, Emery. 



(18). 19. Anterior margin of clypeus not lobed, feebly tridentate in the £ 

 minor, distinctly so in the $ major. 



ambigua, var. rhodesiana, Forel. 



(15). 20. Pronotum not margined. Clypeus with five teeth on the anterior 



margin, the two outermost teeth the smallest. Eyes occupying nearly 



one-third of the sides of the head ; 4 - 5 mm. long Emeryi, Forel. 



S. (Sub-G-enus Pachysima, Emery) aethiops, Smith. 

 Trans. Ent. Soc. London, p. 71, 1877. (Sub-Genus) Ann. Soc. Ent. 

 Belg., vol. 56, p. 97, 1912. Santschi, Eev. Zool. Africaine, vol. i, 

 p. 207, $ , 1911. 



£ . 9-9*6 mm. Black ; tibise, tarsi and antenna? castaneous brown. 

 A very fine and adpressed pubescence on the whole body, denser on 

 the flagelluni and abdomen than elsewhere. Clypeus and apex of 

 abdomen with a few long, yellowish, exserted hairs. Shining, espe- 

 cially the head ; the thorax duller than the abdomen. Head and 

 thorax closely and finely punctured. The punctures are scantier on 

 the vertex of the head than on the cheeks ; the punctures on the 

 pronotum are larger but shallower than elsewhere. Nodes and abdo- 

 men shallowly but closely punctured ; the punctures are smaller on 

 the 2nd node than on the 1st, and very fine on the abdomen. Legs 

 shining and shallowly punctured. 



Head as wide as long, a little narrower in front than behind. Eyes 

 large, placed a little behind the middle of the head. Three distinct, 

 but small and flat ocelli. Clypeus with the lateral angles rounded and 



