386 Annals of the South African Museum. 



form, arcuately emarginate behind between the vertex and occiput. 

 Clypeus long, slightly emarginate in front, covering about two-thirds 

 of the mandibles. Mandibles subparallel, arcuate apically, armed 

 with 7 very acute and unequal teeth. Scape of antenna short, of 

 unequal width, its lower margin bearing clavate hairs, 2nd and 3rd 

 joints of flagellum (1st and 2nd of flagellum ? G.A.) very small, the 

 last joint hardly twice as long as the two preceding together. Disc 

 of thorax convex, meso-epinotal suture absent, epinotal spines acute, 

 wide at the base, moderately divergent. First segment of the petiole 

 pedunculate in front, widening into a node behind, 2nd segment much 

 wider but shorter than the 1st, seen from above trapeziform. Both 

 nodes furnished at the sides and below with spongy tissue. Length, 

 1'5— 1*6 mm. 



" Mto-ya-kifaru, German East Africa." 



" $ . 1*9 mm. Colour and sculpture as in the $ . The striae 

 at the base of the abdomen effaced in the middlp. The articulations 

 (tegulae ?) of the wings and the vertex slightly brownish. Scutellum 

 dull. 



" Stamford Hill, Natal. One $ ." 



Tribe CATAULACINI, Emery. 



Comprising only the following genus : 



Genus CATAULACITS, Smith. 

 Trans. Ent. Soc. London, II, p. 225, 1854. 



Characters. 



$ . Antennae 11-jointed, club 3-jointed, the scape curved, dilated 

 in the apical half. Well-defined scrobes present, capable of receiving 

 the whole of the folded antennae, and placed below and external to the 

 eyes (differing therein from all our other Myrmicine genera). The 

 very divergent frontal carinae do not border the scrobes except at the 

 base of the latter. Margins of the upper surface of the head more or 

 less denticulate, the posterior angles more or less dentiform. Clypeus 

 triangular, the posterior limits feebly defined. Mandibles rather 

 small and stout, armed with 4 or 5 small teeth or edentate. Eyes 

 large and rather flat. Margins of pro-mesonotum denticulate ; 

 thoracic sutures obsolete. Epinotum armed with broad and dorso- 



