36 Annals of the South African Museum. 



2nd segment longer than wide, and one-third longer than the 1st 

 segment. Seen from the side, the 1st segment is much deeper at the 

 apical margin than at the base, the extreme base below is produced 

 into a strong obtuse tooth pointing forwards ; the 2nd segment 

 is very convex above and posteriorly and covers the remaining 

 segments, which are incurved and reflected, so that the apex of the 

 abdomen points forwards. Seen from above, the apical segments 

 are completely hidden from view by the 2nd segment. 



Bulawayo. 1 taken under a stone, and 1 taken in the nest of 

 Platythyrea cribrinodis, Gerst. (G.A., coll.) 



As I have adopted the scheme of classification for the genera 

 given by Emery in the "Genera Insectorum," I have retained this 

 species under the genus Sysphincta. Dr. Forel in his description 

 refers it to the genus Proceratium, and points out that this and 

 other species share some of the characters of both genera, so that he 

 considers it necessary now to sink Sysphincta to a sub-genus of 

 Proceratium. 



Section EUPONEEINAE, Emery. 

 Teibe PONEEINI, Forel. 



Characters. 



£ and ? . Mandibles articulated near the anterior angles of the 

 head ; frontal carinae convergent posteriorly and nearly always 

 produced into a lateral lobe anteriorly, which covers the insertion of 

 the antennae. A more or less marked constriction between the 1st 

 and 2nd abdominal segments. Claws simple or dentate. 



$ . Claws simple or dentate. 



Key to the $ and 2 . 



(2). 1. Middle pair of tibiae with two simple calcaria ; posterior tibiae with two 

 calcaria, the inner large and pectinate Centromijrmex, Mayr. 



(1). 2. Tibiae not so formed. 

 (14). 3. Middle and posterior tibiae with two well-developed calcaria, the inner 

 the larger, and pectinate. 



(5). 4. Node of the petiole compressed above and forming a sharp edge, with a 

 slight notch behind which is in front of a terminal blunt tooth ; clypeus 

 produced into a blunt tooth in the middle of each side ; very large 

 species Streblognathus, Mayr. 



(4). 5. Petiole not compressed above. 



(7). 6. Clypeus with a median raised portion; the latter is deeply excavated in 

 the middle and projects beyond the anterior margin of the head ; 1st 



