A Monograph of the Formicidae of South Africa. 529 



much shorter and a little less abundant than in the type- species. 

 Head smooth and shining, veiy finely and sparsely punctured, the 

 anterior third, including the clypeus, duller, finely, and very super- 

 ficially striate longitudinally. Mandibles dull, densely striate. Thorax 

 with a weak fundamental reticulation, with a few longitudinal rugae 

 superimposed ; these are strongest on the dorsum of the epinotum. 

 Thorax moderately shining. Petiole very superficially coriaceous and 

 rugulose, the upper face of the 1st node shining, the 2nd slightly so. 

 Abdomen smooth and shining. Head a trifle wider than long,~4he 

 posterior margin almost straight, the posterior angles much more 

 widely rounded than in the type-species. Frontal area and sulcus 

 shallow and indistinct. Head twice as wide as the pronotum. The 

 latter is much less clearly marginate at the shoidders than in the type- 

 species, and is not marginate at all in the middle in front, the upper 

 surface merging into the neck by a gradual curve (in the type- species 

 almost vertically truncate in front). The posterior angles of the 

 pronotum not tumid as in the type-species. The promesonotal suture 

 very shallow, nearly obsolete in the middle. Seen in profile, the pro- and 

 mesonotum form an almost continuous convexity, the mesonotum hardly 

 higher than the pronotum, its declivity much more oblique and 

 gradual than in the type-species. The median cannula weaker, the 

 sides of the declivity less strongly marginate. The epinotum similar 

 to that of the type-species, but the spines are more horizontal and 

 shorter, barely longer than the dorsum of the epinotum, about 

 twice as long as they are wide at the base. First segment of 

 the petiole a little wider than long, trapezoidal, the anterior angles 

 somewhat raised, slightly concave transversely. Node of 2nd seg- 

 ment transversely oblong, not grooved in the middle, the sides much 

 less convex than in the type-species, the posterior margin feebly 

 indented in the middle. Abdomen narrower than in the type-species, 

 one and a-half times longer than wide. 



Bedza and Springvale, S. Rhodesia; Sipapoma, S. Rhodesia. 



The latter are somewhat intermediate in structure, the 1st segment 

 to the petiole being nearly half as wide again as long, and the 

 pronotum less obliquely curved in front. 



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



C. gambiensis, Andre. 



Rev. d'Ent., vol. 8, p. 228, £ , 1889. 



"£. 3 - 5-4'5 mm. Head wider than long. Antennae 11 -jointed, 

 club 3-jointed ; scape short, not reaching the posterior margin of the 



