374 Annals of the South African Museum. 



(2) 11. Mandibles with numerous small and distinct teeth, not spiniform. 



(13) 12. Colour dark ochreous; anterior margin of cjypeus shallowly concave ; 



2nd and 3rd joints of flagellum as long as wide . emarginata, Mayr. 



(12) 13. Colour dark yellowish-brown ; anterior margin of clypeus straight ; 



2nd and 3rd joints of flagellum wider than long . transversa, Santschi. 



(1) 14. Mandibles practically edentate, the masticatory margin being very 



long and furnished with minute denticulations which are visible 



only under a very high magnification. 



(16) 15. Pronotum dull, reticulate-punctate. 



Escherichi, Forel, race bocrorum, Santschi. 

 (15) 16. Pronotum shining, almost smooth. 

 (18) 17. 1*7 mm. long ; dorsum of epinotum flat . . . Simoni, Emery. 



(17) 18. 2 , l-2 , 4 mm. long ; dorsum of epinotum convex. 



Escherichi, race limbata, Forel. 



S. traegaordhi, Santschi. 



Goteborgs Kungl. Vetensk. och Vitterh. Hand! XV, 2, p. 28, £ , 1914. 



" $ . 2 mm. Dark reddish-yellow, sometimes brownish ; the 

 middle of the abdomen brown. Mandibles, antennae, and legs 

 yellowish. Dull. Reticulate-punctate. The front of the 2nd node 

 and the abdomen smooth and shining, except a few striae on the base 

 of the latter. Pilosity spatulate, elongate, and abundant, symmetrical 

 and oblique on the sides of the head and the inferior margin of the 

 scape ; on the latter there are 6 or 7 hairs directed outwards. On the 

 thorax there are only short, erect, and truncate hairs, together with 

 4 or 6 much longer and clavate hairs ; these occur again more 

 abundantly over the whole abdomen. Pubescence fine and more or 

 less decumbent, sparse on the head and thorax, more abundant on the 

 mandibles, antennae, legs, and abdomen. Head one-fifth longer than 

 wide, emarginate behind, the posterior angles widely rounded. Eyes 

 with 3 or 4 facets. The scape, very little dilated, reaches the posterior 

 fourth of the head, as also the scrobe. Fourth joint of flagellum 

 distinctly longer than the ] st ; 2nd and 3rd joints wider than long ; 

 5th joint nearly twice as long as the rest of the flagellum. Mandibles 

 linear, slightly curved, with 4 teeth, of which 3 are spiniform and 

 subequal, 2 apical, and 1 placed at the distal third of the mandibles. 

 The 4th tooth is smaller, placed between the innermost and the 

 apical pair, separated by a wide interval. Pronotum twice as wide as 

 long, marginate and arcuate in front, the anterior angles slightly 

 prominent. The pro-mesonotal suture not very distinct. Mesonotum 

 constricted and impressed in its middle, its anterior half forming with 

 the pronotum a fairly strong convexity. Meso-epinotal suture well 

 defined. Dorsum of epinotum marginate, narrower in front than 



