A Monograph of the Formicidae of South Africa. 561 



more abundant on the legs and antennae. Abdomen and anterior 

 margin of the clypeus with erect whitish-yellow and fairly long 

 pilose hairs, scanty. 



Legs and antennae microscopically coriaceous and dull, mandibles 

 very finely aciculate and dull, thorax dull and reticulate-granulate, 

 excepting the pronotum and disc of mesonotum, which, like the head, 

 are smooth and shining, with traces of an almost effaced reticulation ; 

 abdomen smooth and shining. 



Head a little less than one-quarter longer than wide, hardly 

 narrower in front than behind, the sides moderately convex, the hind 

 margin straight. Clypeus distinctly convex transversely, obtusely 



Fig. 56. — A. arenaria, n. sp. 



subcarinate in the middle, the anterior margin convex. Mandibles . 

 5-dentate and very finely striate. Frontal area triangular, wider than 

 long. Scapes long, extending back as far as the middle of the 

 mesonotum, 2nd joint of the flagellum twice as long as wide, all the 

 other joints longer. Eyes large and convex ; traces of 3 ocelli 

 pi-esent. Pronotum one-third wider than long, convex transversely 

 above. Mesonotum oval, a trifle longer than wide, neaidy one-third 

 longer than the metanotum, from which it is indistinctly defined; 

 metanotal stigmata placed in the middle, prominent in profile. Meta- 

 epinotal suture wide and deeply impressed. Dorsum of epinotum 

 rising gradually towards the apex, a little wider there than at the 

 base, wider than long, ending at each side in an acute tooth which is 



