A Monograph of the Formicidae of South Africa. 59 



P. soror, Emery. 



Ann. Soc. Ent. Belg., vol. 43, p. 472, g 2 , 1899. 



£ . 7-8-5 mm. Black ; mandibles and legs dark chestnut-red. 

 Scape, flagellum, and clypeus red-brown, the last joint of flagellum 

 dark red at the apex. Calcaria, and the long hairs on the thorax 

 and abdomen, orange. A fine golden-grey pubescence all over, as in 

 P. Krilgeri. Occipital margin of head straight, the corners rounded, 

 the sides slightly convex. Clypeus raised and sub-carinate in the 

 centre, rounded in front, the raised area shining. Frontal carinae 

 wide in front, narrow behind and divergent. Mandibles smooth and 

 shining, with a few large, deep punctures, chiefly on the inner 

 margin. First joint of flagellum a little longer than the 2nd, 3rd to 

 6th joints as long as broad, 7th to 10th slightly broader than long, 

 apical joint flattened and nearly twice as long as the penultimate. 

 Head and thorax finely and closely punctured, node of petiole more 

 coarsely punctured, 1st and 2nd abdominal segments finely but very 

 distinctly punctured. There are large, shining, piligerous punctures on 

 the body, proportionately larger than in Krilgeri. The epinotum has 

 the declivity widest in the middle, lozenge-shaped, slightly shining and 

 distinctly margined at the sides. Proportionately the node of the 

 petiole is wider than in Krilgeri, and is also flatter on top, otherwise 

 similar. The abdominal constriction is not so marked as in that 

 species. In size and general appearance this species is deceptively 

 like Euponera cajfraria, from which it can be distinguished on closer 

 inspection by the thick node of the petiole, which in cajfraria is 

 squamiform. 



This is a rather rare species in the neighbourhood of Bulawayo. 

 It usually nests under stones, and has a very strong smell of 

 cockroaches. The colonies do not usually comprise more than two 

 dozen individuals. (S.A.M., P.M., G.A. coll.) 



P. cariosa, Emery. 



Ann. Soc. Ent. France, vol. 63, p. 20, $ , 1895. 



" $. 11mm. Black; mandibles, flagellum, articular portions 

 of the legs and tarsi rufescent, margins of the abdominal segments 

 and the anus narrowly testaceous ; very coarsely punctured and 

 also longitudinally striate, with a dense flavous pubescence. Clypeus 

 carinate and produced in the middle, mandibles striate and punctured, 

 node of petiole sub-trapezoid, widely emarginate behind. . . . The 

 petiole is wider behind than in front, depressed in the middle of the 

 posterior margin so as to make it appear widely emarginate. The 



