A Monograph of the Formicidae of South Africa. 675 



of the epinotum convex lengthwise, much, longer than wide, some- 

 times with a feeble transverse impressed line in the middle (this line 

 is not the meta-epinotal suture), merging gradually and arcuately 

 into the declivity, which is shorter than the dorsum. Scale of petiole 

 thick below, thin above, as high as the petiole is long, sharply cuneiform 

 in profile, the dorsal edge trenchant and subacuminate, or sometimes 

 narrowly truncate in the middle ; the anterior face of the scale 

 moderately convex, the posterior face almost flat. Tibiae com- 

 pressed, quadrilateral in cross-section, with two rows of setae below. 

 The posterior metatarsi with two dense rows of lanceolate hairs below, 

 as in G. crepusculi, C. belligerum, etc. 



$ minor, 10-5-12 mm. The large specimens hardly constitute a 

 distinct £ media class, differing from the smaller ones only in having 

 the sides of the head slightly convex in front of the eyes as well as 

 behind them. Colour as in the 2|, but everywhere paler, except 

 sometimes the abdomen, which may be as dark as in the 21. The 

 head and thorax in the palest specimens are straw-yellow. The 

 tibiae at the most only reddish brown. Clypeus and mandibles as in 

 the 2J., the basal sulcus on the mandibles shallower. Head a little 

 longer than wide, widest in front, but very little wider there than 

 behind, the sides in front of the eyes straight, convex behind them, 

 the posterior margin feebly convex. The scapes extend beyond the 

 hind margin by more than half their length. Byes large, more convex 

 than in the 21, placed well behind the middle of the sides. Thorax 

 much more convex than in the 21, L. = 2|- H. (in the 21, L. == 3J H.). 

 Scale of petiole thicker and lower, not higher than it is wide below, 

 seen from the side, equilaterally triangular. Legs as in the 2L 



?, (hitherto undescribed), 14 mm. Colour as in the 21, but a little 

 paler ; the head, thorax, petiole, tibiae, and antennae ochreous- 

 ferruginous, the basal half of the abdomen ferruginous, the apical 

 half reddish brown, the femora reddish ochreous. Head quadrate, 

 as long as wide, as wide in front as behind, the sides parallel in front 

 of the eyes, feebly convex behind them, the posterior margin straight 

 or feebly concave. Eyes placed just behind the middle, occupying a 

 little less than one-third of the sides. The scapes extend beyond 

 the hind margin by a little less than half their length. Mesonotum 

 very finely reticulate, moderately shining, finely, shallowly and 

 sparsely punctured. The dorsum of the epinotum merges gradually 

 into the vertical and longer declivity. Scale of petiole like that of 

 the $ minor, but higher, higher than long. Abdomen ovate. Wings 

 hyaline, nervures and stigma testaceous. 



43 



