A Monograph of the Formicidae of South Africa. 575 



capensis, i. sp., the metanotum is much wider than long, and. widened 

 considerably towards the base). Meso-metanotal impression wider 

 and shallower than in validiuscula. The meta-epinotal suture deep, 

 much deeper than in validiuscula. The dorsum of the epinotum is 

 moderately concave transversly and .convex lengthwise. It rises more 

 steeply from its base than in capensis and its varieties. The teeth 

 are more angular than in that species and directed more distinctly 

 upwards. The brow of the declivity is strongly concave ti'ansversely ; 

 the upper two-thirds of the declivity vertical or nearly so, the lower 

 third oblique or subhorizontal, with a very prominent and dentiform 

 stigma on each side. Petiole about as long as its scale is high, the 

 peduncle behind shorter than its scale and shorter than in capensis. 

 The scale is much thicker, especially at its base ; above it is biden- 

 tate and deeply emarginate between the teeth, the latter short and 

 fairly acute (in some specimens the teeth are very short and almost 

 blunt). 



Redbank, S. Rhodesia. (S.A.M., R.M., G.A. colls.) 



Race Santschii, subsp. n. 



£ . 4 mm. Head subcircular, excluding the mandibles only a very 

 little longer than wide, not narrower in front than behind (distinctly 

 narrowed in front in the type). Pilosity much coarser, thicker and 

 longer, more abundant on the back of the head and on the thorax than 

 in the type. The femora have some exserted pilqse hairs, which are 

 absent in the type. The scape is longer, distinctly more than half its 

 length extending be} r ond the hind margin of the head (hardly half in 

 the type) ; 1st joint of the flagellum one-third longer than the 2nd 

 (nearly twice as long as the 2nd in the type). The meso-metanotum 

 is narrower and there is no distinct suture between the two segments 

 as in the type-species, only a long and fairly deep concavity. Epi- 

 notum like that of the type-species. Peduncle of petiole as long as 

 the base of the scale. The latter is thicker above than in the type and 

 its posterior face is strongly convex transversely (almost flat in egregia, 

 i. sp.). The eyes are relatively larger and more cbnvex. 



Cawston Farm, Umgusa, S. Rhodesia. 



Easily distinguished from egregia type by its larger size, coarser and 

 more abundant pilosity, which is present also on the femora, by the shape 

 of the head and by the longer antennae. Possibly this form should rank 

 as a distinct species. 



Type in my collection. 



