A Monograph of the Formicidae of South Africa. 35 



incrassate towards the apex. Eyes very small, situated in the 

 middle of the sides of the head. Petiole nodiform. 



$ . Clypeus produced anteriorly in an obtuse point ; frontal 

 carinae separated by a sulcus. Scape longer than one-third of the 

 flagellum. Epinotum truncate. Petiole not so high as in the 

 $ . 2nd segment of abdomen only feebly incurved. Wings with 

 one cubital and one discoidal cell. 



S. Arnoldi, Forel. 



Deutsch. Ent. Zeitschr. Beiheft, p. 210, $ , 1913. 



$ . 3 mm. Eeddish yellow, the margins of the frontal carinae 

 and the epinotal teeth piceous. Covered all over with a very 

 dense yellowish-white semi-erect pubescence longer on the abdomen 

 than elsewhere, very short on the flagellum ; a few short pilose hairs 

 on the front of the head, long pale hairs on the ventral surface and 

 sides of the abdomen. Whole body, excluding the legs and flagellum, 

 dull, very minutely, shallowly and irregularly rugose, 2nd abdominal 

 segment and legs slightly shining. Head globose, very little longer 

 than wide, sides moderately convex. Eyes very minute, placed 

 slightly behind the middle of the sides and consisting apparently of 

 only a single facet. Clypeus very short and fused with the frontal 

 carinae ; the latter are linear, convergent in front, divergent behind. 

 Mandibles coarsely punctured, with about 4 blunt teeth on the 

 masticatory margin. Scape strongly incrassate towards the apex, 

 reaching back not quite as far as the occipital margin; flagellum 

 11-jointed, nearly half as long again as the scape, the terminal joints 

 do not form a club, 1st joint a little longer than wide, last joint as 

 long as the three preceding taken together, all the other joints wider 

 than long. Thorax about one-fifth longer than the head, widest in 

 front, but not so wide as the head, narrowing gradually to the 

 epinotum, very convex from side to side and rounded in front. The 

 dorsum of the epinotum is depressed towards the apex which carries 

 a minute blackish tooth on each side ; the declivity is short and 

 vertical. The dorsum is faintly, and the declivity distinctly 

 margined laterally by a raised dark line, confluent with the epinotal 

 teeth. Node of petiole not squamiform, but thick and sub-globose, 

 wider than long, convex at the sides and above, vertical in front and 

 behind; ventral lamella very strongly produced, excised below 

 posteriorly so as to form a sharp tooth pointing backwards. Seen 

 from above, the abdomen is oblong, the 1st segment as long as wide 

 and not much, if at all wider at the apical margin than at the base, 



