A Monograph of the Formicidae of South Africa. 283 



distinguished by its smaller size, lighter colour and stronger 

 sculpture, especially on the nodes and epinotal spines. The latter 

 are more divergent and shorter, hardly half as long as the interval 

 between their bases (distinctly longer in continentis). The 1st node 

 is also more convex, the sides not forming an obtuse angle with the 

 anterior margin as in continentis. 



Bulawayo ; nesting in grassy soil, not common. (S.A.M., P.M., 

 G-.A. colls".) 



T. longicobne, Forel. (Plate VII, figs. 96, 96a). 



Ann. Mus. Nat. Hung., vol. 5, p. 13, $ , 1907. 



$. 47 m.m. Very dark reddish-brown, the head paler or more 

 reddish, the apical two-thirds of the abdomen brownish-black, legs, 

 antennae, mandibles, and clypeus rusty-red or dark reddish-yellow. 

 A very short and sparse pubescence on the legs and antennae, and 

 a few yellowish hairs on the abdomen and clypeus, otherwise glabrous. 

 Head, thorax and nodes reticulate-rugose, very coarsely so on the 

 head and the dorsum of the thorax. The rugae are longitudinal 

 on the vertex and the pro-mesonotum. The clypeus has one median 

 carina and three others or raised lines on each side of the same. 

 Abdomen nitidulous and alutaceous, distinctly but very finely and 

 longitudinally striate over the basal third. Legs and antennae finely 

 reticulate and dull. Head, thorax and nodes dull, the spaces between 

 the rugae scabrous. 



Head about as long as wide, the posterior margin strongly concave, 

 the posterior angles rounded and turned downwards. Mandibles 

 large, subopaque, very finely striate and punctate, with three strong 

 teeth in front, and indistinctly dentate behind. Median area of 

 clypeus flat transversely, the anterior margin feebly arcuate; the 

 lateral ridges of the clypeus are very prominent. Frontal carinae 

 more widely separated from each other at their base than they are 

 from the sides of the head, somewhat expanded above the antennal 

 sockets, furnishing a slight depression below for the base of the 

 scapes, and extending back beyond the level of the posterior margin 

 of the eyes. The latter large, convex and very prominent, placed a 

 little behind the middle of the sides. Scapes long, extending beyond 

 the hind margin of the head by nearly one-third of their length ; all 

 the joints of the flagellum longer than wide. 



Pronotum distinctly marginate in front and at the sides, the 

 anterior angles fairly sharp. Below the raised anterior margin there 

 is a short vertical face which joins the rather long and finely granulate 



