Hagensia peringueyi (Emery, 1899):
the Black hag ant
These ants may be peripherally involved in myrmecochory, as they tend to carry prey back to their nests rather than eating it in situ. They have powerful stings and jaws and should be handled with care!
The nests are shallow, generally under stones. The species appears to be confined to the Western and Eastern Cape provinces.
This genus used to be lumped with Pachycondyla, but has recently been separated; see
Schmidt, C. A.; Shattuck, S. O. 2014. The Higher Classification of the Ant Subfamily Ponerinae (Hymenoptera: Formicidae), with a Review of Ponerine Ecology and Behavior. Zootaxa 3817(1):1-242. PDF 142616
News of the revision is at http://www.myrmecos.net/2014/06/18/
Arnold’s taxonomic description of the species is at