A Monograph of the Formicidae of South Africa. 179 



darker colour. The 1st node of the petiole is distinctly narrower than 

 in the type. 



£ . 7*8 mm. The author's description of this sex agrees entirely 

 with that of the race. 



Zululand. (Triigardh.) 



Eace cuitensis, Forel, var. bulawayana, Forel. 



(Race) Bull. Soc. Vaud., vol. 47, p. 317, 1911. (Var.) Ann. Soc. Ent. 

 Belg., vol. 57, p. 112, £ , 1913. 



" Smaller than the type of the race, less dull, simply sub-opaque. 

 The node is also a little narrower, and the head a little shorter ; 

 otherwise like the type of cuitensis." 



^ . 7"5 mm. This differs from the type of the species in its 

 slightly smaller size, in having the sides of the head more parallel, the 

 epinotum a little more oblique posteriorly, and the 1st joint of the 

 petiole a little narrower. 



$ . 8"5 mm. This is smaller than the type of the species. The 

 head is more parallel-sided, the epinotum narrower posteriorly, the 

 denticulations of the clypeus smaller, and the colour a little redder ; 

 otherwise like the type. 



Bulawayo, Plumtree, Bembesi, Victoria Falls. S. Rhodesia. Nest- 

 ing in the hollow twigs of trees. (S.A.M;, R.M., Gr.A. colls.) 



I have not seen examples of the race cuitensis, and am therefore 

 obliged to compare this variety with reference to the type of the 

 pecies. 



S. (Sub-genus Sima, s. str.) Andrei, Mayr. 

 Ann. K.K.KH. Mus. Wien, vol. 10, p. 144, £ , 1895. 

 " 5 • 4"6 mm. Black, partly piceous, mandibles, scapes and 1st 

 joint of flagellum, tibiae, tarsi and apex of femora reddish yellow ; 

 sometimes the tibiae are brownish red-yellow, and the flagellum, except 

 the 1st joint, yellowish brown. Pilosity almost absent, the decumbent 

 pubescence very fine, short and dense, visible on the head and thorax 

 only under a strong magnification. Dull ; head and dorsum of thorax 

 closely and finely punctured, the sides of the pronotum slightly 

 shining and finely rugulose, the sides of the meso- and metathorax, 

 the petiole and abdomen rugulose-punctate, although not easily 

 recognisable on the last, on account of the dense pubescence. The 

 mandibles coarsely longitudinally striate, and with a few punctures, 

 the very oblique masticatory margin quadridentate. The head is, as 

 in Mocquerysi, Andre, rectangular, longer than wide, parallel- sided. 



