A Monograph of the Formicidae of South Africa. 691 



sides moderately convex, the posterior margin straight, the posterior 

 angles less rounded. Thorax almost parallel-sided, the mesonotum 

 a trifle longer than wide. Dorsum of epinotum convex lengthwise, 

 oblique, twice as wide at the base as across the apex, shorter than the 

 vertical declivity. Scale higher and thinner than in the 21., the dorsal 

 edge fairly trenchant. Dealated. Otherwise like the 2J.. 



S, 6-6-5 mm. Piceous, the basal half of the scape, the anterior 

 half of the head, the mandibles, tibiae and tarsi more or less reddish 

 brown. Head, mesonotum and scutellum dull, very closely and 

 finely reticulate-punctate. Epinotum and petiole moderately shining 

 and superficially reticulate, abdomen finely reticulate-rugulose, dull, 

 except the apical margins of the segments which are slightly shining. 

 Pubescence greyish, much sparser and shorter everywhere than 

 in the $, and not hiding the sculpture on the abdomen. Pilosity 

 longer, thinner and more plentiful. Posterior two-thirds of the head, 

 including the eyes, semicircular in outline, the anterior third parallel- 

 sided or nearly so. Clypeus subcarinate, the anterior margin arcuate. 

 Eyes very large and convex, occupying the middle third of the sides. 

 Ocelli fairly large. The scape extends beyond the hind margin of 

 the head by half its length. Mandibles with a blunt apical tooth, 

 the rest of the masticatory margin convex. The two faces of the 

 epinotum form in profile a continuous arc. Scale as high as long 

 below, conical in profile, the anterior face feebly concave from side to 

 side, the posterior face convex, the dorsal edge blunt and deeply 

 emarginate. Wings hyaline, nervures pale ochreous, stigma pale 

 yellowish brown. 



A very common species over the greater part of S. Africa. 



(S.A.M., P.M., G.A. colls.). 



Race cinctellus, var. ustithorax, Forel. 

 Zool. Jahrb., vol. 29, p. 271, », 1910. 



This variety differs from the race as follows : — 



2|. Head pale yellowish brick-red, the anterior half paler than the 

 posterior, the lateral pieces of the clypeus and the vertex more or 

 less brownish red. Thorax brown, the disc of the mesonotum usually 

 more or less brownish red, an ill-defined spot on each side of the 

 pronotum pale brick-red. Mandibles, flagellum, apices of the femora, 

 tibiae and tarsi ferruginous (burnt sienna). 



The junction of the two faces of the epinotum is less angular than 

 in the type of the race, and the scale is a little thinner above. 



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