A Monograph of the Formicidae of South Africa. 329 



Var. Shilohensis, Forel. 

 Deutsch. Ent. Zeitschr., Beiheft, p. 218, £ , 1913. 



$ . 2*3-2'5 mm. Bright yellow, with the reticulations and the 

 flagellum somewhat reddish-yellow. The larger forms, found in a 

 different locality, are darker than the smaller ones, but otherwise 

 similar. The pilosity is fairly abundant, and is composed of pointed, 

 yellow hairs, erect on the body, oblique and shorter on the legs and 

 antennae, which are also sparsely pubescent. Head, thorax, and nodes 

 feebly shining. Head, between the frontal carinae, dorsum of thorax, 

 and sides of pro-thorax, rather strongly and longitudinally rugose, also 

 partly reticulate. Sides of head reticulate, the rugae emphasised 

 longitudinally, the floor of the meshes finely reticulate. Distinct 

 demiscrobes present. Sides of meso- and epinotum duller, closely 

 rugulose. Nodes feebly rugulose. Declivity of epinotum and the 

 abdomen smooth and shining. 



Head, excluding the mandibles, a little longer than wide, the sides 

 moderately convex, the posterior margin straight or feebly concave in 

 the middle. Eyes small, placed in the middle of the sides. Frontal 

 carinae prolonged back as far as the occipital margin, divergent along 

 their anterior third, nearly parallel behind. Scapes rather short, 

 barely reaching beyond the posterior third of the head. Clypeus tri- 

 carinate. Dorsum of thorax distinctly marginate in front and at the 

 sides. Pro-mesonotal suture obsolete above, the meso-epinotal indi- 

 cated by a shallow groove. The thorax is moderately constricted 

 between the pro- and mesonotum, more strongly so between the meso- 

 and epinotum. Dorsum of epinotum one and a half times longer than 

 the subvertical declivity. Epinotal teeth fairly large, acute, a trifle 

 longer than their basal width, and quite twice as long as the episternal 

 lobes ; moderately divergent, directed very obliquely upwards. First 

 node of petiole as long as its -peduncle, vertically truncate in front, 

 convex lengthwise above and behind, a little longer than wide. 

 Second node one-third wider than the 1st, as wide as long, widest 

 behind. 



Bembesi, S. Rhodesia (the smaller forms, 2*3 mm.), in the nest of 

 Platythyrea cribrinodis ; Shiloh, S. Rhodesia, in the nest of Ophthal- 

 mopone Berthoudi. (S.A.M., R.M., Gr.A. colls.) 



Race Isipingense, Forel. 

 Bull. Soc. Vaud. Sc. Nat., vol. 50, p. 225, £ , 1914. 

 $ . 3-3*3 mm. Pale ochreous yellow, the nodes slightly brownish. 



