A Monograph of tlie Formicidae of South Africa. 375 



behind, and on the same level as the posterior half of the mesonotum. 

 Epinotal spines a little longer than their [basal width, as long as 

 one-third of the interval between them. Declivity of epinotum con- 

 cave, margined at the sides with a band of spongy tissue. First node 

 higher and wider than long, rounded at the summit, which, seen from 

 above, has a transversely rectangular shape, barely arcuate anteriorly- 

 The anterior face is hardly convex, oblique, and a little shorter than 

 the dorsal face. Second node twice as wide as long, convex in front, 

 nearly straight behind. A spongy mass covers the lower surface and 

 also the sides of the petiole. 



" Pietermaritzburg and Sweetwaters, Natal. (Traegaordh)." 



S. irrorata, Santschi. 



Loc. cit., p. 29, ^ • 



" $. 1'5 mm. Eeddish-yellow. Antennae and legs of a paler 

 yellow. Finely reticulate-punctate. Dull. Nodes and abdomen 

 smooth and shining, except a few striae at the base of the latter, and 

 some longitudinal striae on the pronotum. Head clothed with 

 spatulate hairs, short and white ; forming a row on the lower margin 

 of the scape and directed outwards, also on the margin of the clypeus. 

 Pronotum also with spatulate hairs, but less abundant. In addition, 

 there are also some long hairs, with or without clavate ends. Man- 

 dibles, legs, and antennae fairly pubescent. Head one-sixth longer 

 than wide, emarginate behind, the sides very convex. Eyes with 

 4 or 5 facets. The scape and its scrobe extend a little beyond the 

 posterior fourth of the head, the scape fairly dilated. First and 

 4th joints of the flagellum subequal, the 4th wider than the 1st, the 

 2nd and 3i*d wider than long, the last joint one-fourth longer than 

 the rest of the flagellum. Mandibles linear and moderately curved, 

 distinctly shorter than half the length of the head, with 3 long 

 teeth feebly incurved above, the 3rd placed at the distal fourth of the 

 mandible, the teeth crossing when the mandibles are closed. Pro- 

 notum (without the neck) twice as wide as long, marginate and 

 arcuate in front, the shoulders rectangular, well defined but obtuse ; 

 the sides straight, submarginate and convergent behind. Pro-meso- 

 nolal suture distinct, concave behind. Mesonotum twice as long as 

 wide in the middle, twice as wide in front as behind, submarginate. 

 Epinotum marginate, the dorsum narrower in front, a little longer 

 than it is wide behind. Epinotal spines as long as they are wide at 

 the base, nearly as long as one-third of the interval between them. 

 Declivity margined with a band of spongy tissue. First node 



