A Monograph of the Formicidae of South Africa. 19 



12-jointed ; the scape extends very slightly beyond the posterior 

 margin of the eyes, it is strongly incrassate towards the apex, and 

 is longer than half the flagellum, or as long as the lst-9th joints 

 together ; the 2nd-9th joints of the flagellum wider than long, the 

 apical joint not wider than, but about as long as the two preceding 

 joints taken together. Mandibles triangular, masticatory margin 

 concave and without teeth. Thorax without trace of sutures, twice 

 as long as wide, widest at its posterior fourth, margined above, very 

 distinctly so anteriorly and posteriorly, but less so at the sides. 

 Seen in profile, the dorsum of the thorax is decidedly convex longi- 

 tudinally, and the sides are vertical. The declivity is almost vertical 

 and strongly margined all round. The petiole is sharply margined 

 above, and three-quarters as wide again as long ; the anterior face 

 is vertical, the anterior dorsal margin almost straight, the sides are 

 moderately convex, the posterior margin depressed, and the posterior 

 lateral angles are raised and form a blunt triangular tooth on each 

 side. The 1st abdominal segment is as wide as the petiole, a trifle 

 wider than long, the sides parallel ; the sides are somewhat angularly 

 but obtusely delimited from the dorsum, but not marginate. The 

 2nd abdominal segment hardly longer, but one-quarter wider than 

 the 1st. Posterior metatarsi longer than the tibiae. 



Nesting under the roots of a tree. Umgeni, Durban. (C. B. 

 Cooper.) 



This species appears to differ from P. Braunsi, which is known 

 to me only from the description, by its larger size, smaller eyes, 

 longer scape, and much stronger puncturation. 



Type in my collection. (E.M., S.A.M. and G.A. colls.) 



Tribe CYLINDROMYRMICINI, Emery. 



Characters. 



% and ? . Frontal carinae elongate and projecting laterally so 

 as to form a short scrobe into which the base of the scape can be 

 inserted. Eyes large, at least one ocellus in the $ . Body elongate. 

 Pygidium furnished laterally with short stumpy spines. 



$ . Antennae 13-jointed ; scape short, 1st joint of flagellum very 

 short, the following joints longer than wide. 



This tribe includes two genera, Gylindromyrmex, Mayr, which is 

 ■confined to South America, and Simopone, Forel, of which 5 species 



