A Monograph of the Formicidae of South Africa. 717 



dorsum of the epinotum which is very little more strongly sculptured 

 than the rest of the thorax. The pilosity is whitish, longer and more 

 abundant, especially on the abdomen. There are a few erect pilose 

 hairs on the head and thorax (absent in Braunsi), and there are about 

 three or four transverse rows of the same on each abdominal segment. 

 At the base of the abdomen the hairs are as coarse as those on the 

 epinotum and scale. The mandibles have 6 teeth. The scapes are a 

 little longer and extend beyond the hind margin by as much as the 

 length of the 1st joint of the flagellum. Dorsum of epinotum very 

 slightly wider at the apex than at the base, almost square, the lateral 

 margins tumid and not distinctly marginate, flat, feebly concave only 

 near the apical margin which is feebly depressed in the middle ; 

 declivity subvertical, not concave but flat from above to below, its 

 lower half shining, the brow rounded. Otherwise like C. Braunsi. 



$ minor, 6 mm. The head is less narrowed in front than in the 

 21, subquadrate. The scapes extend beyond the hind margin by 

 one-third of their length. The clypeus subcarinate. The pronotal 

 shoulders much more distinct than in the 2J., or in the $ of Braunsi. 



Victoria Falls. Nesting in hollow tree-trunks. A more agile 

 insect than Braunsi. 



(S.A.M., E.M., G.A. colls.). 



C. SCABRINODIS, 11. Sp. 



£, 4-6-6 mm. Black ; tibiae, tarsi and antennae ferruginous, the 

 last two joints of the latter brownish, mandibles castaneous, the 

 masticatory margins piceous. Pilosity greyish, fairly short ; some 

 of the hairs are thick and erect, these are more plentiful on the 

 abdomen than elsewhere, but nevertheless are fairly sparse ; the rest 

 of the pilosity is decumbent and longer, and these are more abundant 

 on the epinotum and petiole. A sparse and decumbent pubescence 

 on the legs and antennae. Dull ; head and pro-mesonotum strongly 

 and regularly reticulate-punctate, the spaces between the reticulations 

 wider than the latter, also more or less circular and pit-like and slightly 

 shining. Abdomen, femora and tibiae very closely reticulate- 

 punctate (like that of C. Braunsi Mayr) ; epinotum, excepting the 

 declivity which is rugulose and shining, and dorsum of the node very 

 coarsely reticulate-rugose, anterior and posterior faces of the node 

 transversely reticulate rugulose. Head widest in the middle, one- 

 third wider behind than in front, as wide as long, the sides and posterior 

 margin moderately convex. Mandibles dull, strongly and sparsely 



