A Monograph of the Formicidae of South Africa. 723 



lobate in front, the anterior margin straight, the lateral pieces 

 triangular, well defined and not small. Frontal carinae not very 

 divergent. The scapes extend beyond the hind margin. Eyes placed 

 at the posterior third. Pro-mesonotal suture distinct. The dorsum 

 of the pronotum and the mesonotum form an even convexity in profile 

 as far as the middle of the mesonotum, the posterior half of the latter 

 is steeper and forms an oblique declivity. The meso-epinotal suture 

 fairly deep. The dorsum of the epinotum lies much lower than the 

 mesonotum, and is placed step-like below it (see fig. 145). It is very 

 convex transversely, subhorizontal lengthwise, as long as the oblique 

 declivity and joining the same in a low curve. The scale of the 

 petiole is moderately convex in front, flat behind, the dorsal edge 

 obtuse and slightly emarginate in the middle. Tibiae nearly cylin- 

 drical, not setose below. 



$ minor, 4*7-6 mm. Only the anterior corners and the extreme 

 apical margin of the clypeus reddish. The posterior margin of the 

 head slightly convex, the sides straighter than in the 21 . The declivity 

 of the mesonotum less distinct, but the step-like shape of the thorax 

 is even more pronounced than in the 2J. owing to the dorsum of the 

 epinotum being more convex lengthwise and rising a little posteriorly. 

 The dorsum is also narrower than in the 2J. and more convex trans- 

 versely. Otherwise like the 7[. 



"?, 9 mm. Wings feebly tinged with yellow, with yellow nervures 

 and brown stigma. Otherwise like the 21." 



Natal, 6,000 ft. (Haviland). 



(E.M., G.A. colls., ex Natal Museum coll.). 



Sub-genus MYRMOTREMA, Forel. 



For characters see table of sub-genera. 



The fundamental sculpture on the head and thorax of the 2J. and ^ 

 usually consists of a fine reticulate-puncturation, appearing under 

 a low magnification more or less granulate. Some species, however, 

 are finely rugulose like the Myrmoturba sub-genus. In all the 2J.2J. 

 the anterior part of the head has numerous pubescent, pit-like 

 punctures superimposed, which are plainly visible under even a low 

 magnification. C. Barbarossa of the preceding sub-genus also has 

 the anterior part of the head pitted, but it is not likely to be mistaken 

 for a species of Myrmotrema, since the pits are densely pilose (not 

 pubescent), and because the epinotum is more or less cuboid. The 



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