A Monograph of the Formicidae of South Africa. 649 



Race Negus, var. mathildae, Forel. 

 Zool. Jahrb. vol. 29, p. 266, % $ 9. 1910. 



"Qj.. 10*5 mm. Mandibles small, smooth, sparsely punctured, the 

 external margin feebly convex, the apex narrow. Clypeus sharply 

 carinate, its fairly rectangular lobe having a slightly concave anterior 

 margin. Head as wide as long, with very convex sides, narrowed 

 in front and behind, more strongly so in front, strongly and arcu- 

 ately emarginate behind. Frontal carinae sinuate, moderately divergent. 

 Frontal area small and triangular. Eyes flat. The scape extends 

 beyond the hind margin by not quite twice its own apical width. 

 Thorax narrow, feebly convex in all directions above. Declivity of 

 the epinotum half as long as the long and narrow dorsum. Scale 

 moderately thick, biconvex, fairly trenchant above. Tibiae rounded, 

 feebly compressed, with a row of setae on the lower margin. Dull, 

 head finely reticulate-punctate, thorax rugulose-reticulate. Abdomen 

 and legs nitidulous, closely and finely rugulose transversely. The 

 scattered puncturation is distinct only on the abdomen, and fairly fine. 

 The brownish yellow and exserted pilosity is very sparse -on the body, 

 rather more abundant on the scale and abdomen, absent from the 

 tibiae, scapes and cheeks. The pubescence on the scapes and tibiae 

 more abundant, elsewhere very sparse and fine. Black. Thorax dark 

 brown. Legs and mandibles of a brighter brown, flagellum ferruginous. 

 Apical margins of the abdominal segments yellowish. 



^ minor, 65 mm. Head elongate and oval, 1*2 mm. wide and 

 1'8 mm. long, not narrowed into a neck behind, the convex sides 

 merge into the wide and articular hind margin. Clypeus, mandibles 

 etc as in the Qj., but the eyes are convex. The scape extends beyond 

 the hind margin by about half its length. The long dorsum of the 

 thorax very feebly convex. Scale very thick, almost wedge-shaped. 

 Otherwise like the Oj., but the head and thorax are brown. 



9, 125 mm. "Wings faintly tinged with brown. Head and thorax 

 blackish brown. Tarsi and tibiae reddish like the flagellum. Head 

 rectangular, with the angles rounded, longer than wide." 



It is generally difficult to identify the winged forms of this genus 

 when apart from their workers, but their identification is rendered 

 all the more difficult when the description is cut down to the narrow 

 limits of that of the 9 given above, which is indeed well-nigh useless. 



Zoutpansberg, Transvaal, (Rolle). 



This form completes the list of the maculatus group, for our region, 



