A Monograph of the Formicidae of South Africa. 379 



S. EMAEGINATA, Mayr. 



Ann. K.K.KH. Mus. Wien, vol. 16, p. 26, £ , 1901. 



$ . 2-2 - 2 mm. Ochreous ; the abdomen and mandibles slightly 

 brownish-yellow. Abdomen and 2nd node moderately shining, the 

 rest of the body dull. Head, thorax, excepting the pronotum, dorsum 

 of epinotum, and 1st node finely and closely reticulate-punctate ; the 

 declivity of the epinotum, the 2nd node, and the abdomen smooth, 

 the basal third of the latter strongly and obliquely striate on each 

 side (about 6 striae on each side). Head, pro-, and mesonotum 

 clothed with curved spatulate hairs, very scantily on the pro- and 

 mesonotum, fairly abundantly on the head. Anterior margin of the 

 scape with a row of such hairs, directed outwards. The anterior 

 margin of the clypeus with a dense row of scale-like hairs. The rest 

 of the body very sparsely and irregularly pilose, the hairs fairly long 

 and acuminate, not clavate. Legs with adpressed and simple hairs. 

 Head not quite half as long again as wide, at its widest point two 

 and two-fifths wider than the width of the anterior margin of the 

 clypeus, the posterior margin widely and fairly deeply emarginate, not 

 very convex at the sides. The scapes and the scrobes do not extend 

 back, beyond the eye by a distance greater than the long diameter of 

 the latter. The scrobes much shallower than in Arnoldi or Havilandi, 

 the upper and lower margins not very clearly defined. First joint of 

 the flagellum a little longer and thinner than the 4th, 2nd and 3rd 

 joints about as long as wide, 5th joint nearly one-third longer than 

 the rest of the flagellum. Eyes fairly large, composed of 20 or more 

 facets. Posterior margin of clypeus angular, the anterior margin 

 shallowly concave. The mandibles are more than half hidden under 

 the clypeus, the exposed apical portion feebly convex externally, the 

 internal margin armed with numerous small teeth. The dorsal profile 

 of the thorax is almost flat, the pronotum slanting very slightly down- 

 wards and forwards, the mesonotum feebly depressed in the middle. 

 The pronotum is longer than wide, rounded at the sides and in front, 

 faintly striate. Pro-mesouotal suture very feeble, the meso-epinotal 

 a little more distinct. Dorsum of epinotum widest between the 

 spines, as long as wide. Epiuotal spines long and acute, almost 

 parallel, quite as long as the interval between their bases. First 

 node, seen from above, more or less hemispherical, rounded and 

 narrower in front ; 2nd node twice as wide as long, a little more than 

 twice as wide as the 1st, transversely oval or lenticular, the anterior 

 margin more convex than the posterior. Abdomen distinctly depressed 

 in the middle near the base. Both nodes covered behind and below 



