A Monograph of the Formicidae of South Africa. 443 



tumid. Nodes as in the If. , but proportionately wider and stouter. 

 Deiilated. 



Capetown, Willowmore and Kimberley. (S.A.M., R.M., G.A. colls.) 

 The shape of the second segment of the petiole in the 1/ is variable, 

 even in examples taken from the same nest. In some the sides are 

 merely acutely angular, in others the angles are produced into more or 

 less prominent teeth or spines. For this reason it appears to me that 

 the race Dregei, Emery (Ann. Soc. Ent. France, vol. 68, p. 34, 1895), 

 which differs only in its greater size (6-6 - 5 mm.) and more produced 

 sides of the 2nd node, should be regarded as no more than a slight 

 variety. It has been recorded from Kimberley, Makapan, Bloemfon- 

 tein and Delagoa Bay. 



P. xocensis, Forel. (Plate VI, fig. 68.) 

 Deutsch. Ent. Zeitschr. Beiheft, p. 213, 1/, $, 1913. 



1/ . 4 , 9-5 , 4 mm. Head and thorax varying from dark castaneous 

 red to dark reddish-brown, the anterior fourth of the head, the 

 occipital lobes and the epinotum always paler ; mandibles bright 

 castaneous red, with the margins piceous ; flagellum and legs reddish- 

 yellow, abdomen dark brown. The pilosity is composed of much 

 thinner hairs than in capensis and is more obhque, and on the abdo- 

 men more abundant. The sculpture is very similar to that of capensis 

 and differs only as follows. The coarser sculpture on the head 

 extends over the anterior two-thirds, and the posterior third is duller 

 than in the other species, being very finely rugulose or reticulate, and 

 as this is also the fundamental sculpture of the anterior portion, the 

 coarse sculpture does not appear to end so abruptly as in capensis. 

 The median area of the clypeus is almost smooth, not longitudinally 

 striate as in capensis. The mandibles are more finely punctured. 

 The striae on the thorax are a little coarser and the dorsum of the 

 epinotum is very shining and almost smooth. Nodes rugulose, also 

 finely and transversely striate. Base of abdomen distinctly and finely 

 reticulate, with a few short striae as well (without sculpture in 

 capensis). The rest of the abdomen smooth, shining and sparsely 

 punctured. 



Head, excluding the mandibles, one-fourth longer than wide, the 

 sides parallel, the posterior emargination narrower but much less deep 

 than in capensis, the occipital lobes less prominent and wider at the 

 apex than in capensis. The occipitofrontal sulcus is deeper and in 

 its posterior half margined on each side by a thin ridge. Mandibles 

 stouter and more convex externally (I cannot see in any of the 



