A Monograph of the Formicidae of South Africa. 559 



spines of the node are flattened from front to back, directed obliquely 

 backwards ; their anterior edge when seen in profile is straight, not 

 convex as in the type-species. Otherwise like the type-species, but a 

 much more robust and darker insect. 



Balla-Balla, S. Rhodesia. (R.M., Gr.A. colls. ; type in my 

 collection.) 



v 



Var. NATALENSIS, n. Y. 



^ . 2 - 4 mm. Very similar to var. ballaensis but smaller. Sculp- 

 ture and pilosity as in that variety. The head is narrower, being one- 

 fifth to one-fourth longer than wide. The scapes extend beyond the 

 hind margin of the head by one-third of their length. Epinotal teeth 

 smaller than in the type of the species, and considerably smaller and 

 more obtuse than in var. ballaensis. The petiole resembles that of the 

 type of the species, the teeth being curved backwards, but they are 

 shorter, being barely longer than their basal width. Colour like that 

 of var. ballaensis. 



Pieterniaritzburg (Dr. C. Akerman), ex. Natal Museum coll. Type 

 in my collection. 



A. longinoda, n. sp. (Plate VIII, figs. 120, 120 a.) 



Q . 3-3 - 8 mm. Head, thorax and petiole dark castaneous red or 

 reddish-brown, abdomen black, legs brownish, the tarsi paler, flagellum 

 dark brown, mandibles and scapes reddish-oclrreous, the scapes 

 becoming brownish towards their apices. Dull, very closely and finely 

 reticulate-punctate, or apparently granulate ; the thorax with a fine, 

 widely-spaced reticulation superimposed, more apparent and closer on 

 the epinotum than elsewhere. Abdomen almost smooth, shining. 

 Femora reticulate-punctate and dull. Mandibles slightly shining, 

 finely striate and sparsely punctured, 5-dentate. Pubescence very 

 fine and sparse, almost absent on the thorax. Abdomen with a sparse, 

 erect, black, short and obtuse pilosity. Clypeus with about 6 long 

 dark and exserted hairs. 



Head, excluding the mandibles, about one-sixth longer than wide, 

 oval, the posterior margin straight. Eyes large, occupying nearly the 

 middle third of the sides. Ocelli barely distinguishable. Scapes very 

 long, quite half their length extending beyond the back of the head, 

 reaching as far as the pro-mesonotal suture ; 2nd joint of flagellum 

 twice as long as wide, the other joints much longer. Pronotum long, 

 nearly as long as the meso-nietanotum, not more than one-fourth 

 wider than long in the middle, fairly convex above from side to side. 



