A Monograph of the Formicidae of South Africa. 95 



thorax and wider than long ; mesonotum wider than long. Pro- 

 meso, and meso-epinotal sutures well defined ; epinotum as long as 

 the pro- and mesonotum together, widening a little towards its apex, 

 convex from side to side above ; the declivity rather short, very 

 steep but not vertical. Node of petiole sub-quadrate, a little wider 

 behind than in front, and a little wider behind than it is long, 

 anterior and posterior faces vertical, but the former rounded at the 

 brow ; the dorsal profile of the node slopes down from behind to 

 the front. First abdominal segment as long as the 2nd, both seg- 

 ments a little wider than long ; intersegmental constriction weak. 

 Bulawayo. (G.A. coll.) 



Sub-Genus LOBOPELTA, Mayr. 

 Verb.. Zool. Bot. Ges. Wien, vol. 12, p. 733, 1862. 



Characters. 



5 . Mandibles triangular and dentate, or narrow and with an 

 apical tooth ; in the latter case the mandibles are much shorter than 

 in Leptogenys and do not enclose a large space in front of the 

 clypeus. Clypeus usually with a pointed or carinate lobe, or with 

 a tooth on each side of the middle. 



? . Ergatoid. 



$ . Not distinguishable from that of Leptogenys. 



V 



Key to the $ $ of Sub-genus Lobopelta. 



(10). 1. Black species. 

 (9). 2. Node of petiole as long as, or only slightly longer than wide. 

 (4). 3. Impunctate or nearly so ; dorsum of epinotum very smooth. 



nitida, Smith. 

 (3). 4. Puncturation distinct ; dorsum of epinotum more or less strigose. 



(6). 5. Pronotum distinctly punctured Peringueyi, Forel. 



(5). 6. Pronotum not punctured, but rugose. 



(8). 7. Node of petiole a little wider than long; 8th-10th joints of flagellum 



wider than long Arnoldi, Forel. 



(7). 8. Node of petiole longer than wide ; 8th-10th joints of flagellum longer 



than wide Havilandi, Forel. 



(2). 9. Node of petiole two and one-third times as long as it is wide posteriorly. 



attenuate!, Smith. 

 (1). 10. Reddish yellow or castaneous species. 

 (12). 11. Larger species, 4-4-5 mm. ; scape of antenna impunctate. .nitida, Smith. 

 (11). 12. Smaller species, less than 4 mm. ; scape of antenna finely but distinctly 



punctured. 

 (14). 13. Head almost quadrate, only slightly longer than wide . . parva, Forel. 

 (13). 14. Head distinctly longer than wide castanea, Mayr. 



