A Monograph of the Formicidae of Sotdh Africa. 449 



V 



Var. rufescens, n. v. 



11 . Differs from the type of the species in the following characters : 

 Head, thorax, petiole and legs bright yellowish-red, abdomen dai-k 

 brown or black. The sculpture of the head is much finer and closer 

 and extends further back, only the posterior third of the head being 

 smooth. The head is pai-allel-sided and longer than the type-species, 

 and the occipito-frontal sulcus is deeper and extends forwards almost 

 to the posterior angle of the frontal area. The sculpture of the thorax 

 is finer than in the type. The posterior lateral angles of the pronotum 

 are very obtuse, and the epinotal spines are shorter. Petiole similar 

 to that of the type, but the lateral spines of the 2nd node are shorter. 



5 . A little smaller than the type-species, the puncturation of the 

 head, thorax and nodes much finer. The sides of the 2nd node are 

 barely angular. Otherwise like the type of the species. 



Sipapoma and Victoria Falls, S. Ehodesia. (S.A.M., R.M., Gr.A. 

 colls. ; types in my collection.) 



A form of the type- species having the head brightly coloured also 

 occurs, but it can be distinguished from rufescens by the sculpture and 

 the shorter head of the 1/ . 



Pheidole strator, Forel, race fugax, n. r. 

 Forel, Zool. Jahrb., vol. 29, p. 256, 1910. 



If.. 3'8-4 mm. Differs from the description of the type of the 

 species as follows : 



Colour darker, head reddish-brown, thorax and abdomen very dark- 

 brown or piceous, legs and scapes brownish-yellow, tarsi and flagellum 

 ochreous, mandibles pale burnt-sienna, the masticatory margins black. 

 The vertex is only longitudinally striate, the striae fairly fine, 

 widely spaced, and extending back to a little beyond the middle. The 

 sides of the head as far as the base of the occipital lobes are very finely 

 reticulate and subopaque, with a stronger sculpture of longitudinal 

 rugae superimposed, which are strongest in front. The dorsal surface 

 of the two nodes and the extreme base of the abdomen very superficially 

 reticulate. The dorsum of the epinotum is as long as, or even longer 

 than wide, and only very indistinctly marginate at the sides. The 

 head is widest at the beginning of the posterior third, and is very 

 nearly half as long again as wide (excluding the mandibles). 



$ . l - 8-2 mm. Piceous, legs and scapes yellowish-brown, tarsi, 

 flagellum and mandibles fuscous ochreous. Sides of petiole and 

 mesonotum reticulate. Otherwise just like the type of the species. 



