A Monograph of the Formicidae of South Africa. 309 



and reflected to form a collar, with prominent lateral angles. Eyes 

 large, occupying nearly the whole of the anterior half of the sides ; 

 ocelli large and prominent. Frontal carinae extend back almost as 

 far as the anterior ocellus. Mandibles small, dentate. Scape not 

 extending back as far as the anterior ocellus, twice as thick as the 

 2nd joint of the flagellum ; the latter is longer than the scape and 

 the 1st joint taken together. Pronotum slightly exposed above at the 

 shoulders. Mayrian furrows well defined. Mesonotum separated 

 from the scutellum by a wide and clathrate groove. The dorsum of 

 the epinotum not distinctly delimited from the declivity, the profile 

 of the epinotum forming a continuous curve from base to apex. 

 First node of petiole somewhat pyriform, the ventral lamella produced 

 into a rather large tooth near the base. Second node at least half as 

 wide again as the 1st, wider than long, only slightly convex transversely. 

 Wings as in the 9 . 



S. Rhodesia. Common in grassy soil. The entrance to the nest 

 consists of one or more holes, which are rarely surrounded by mounds 

 of earth. (S.A.M., R.M., G.A. colls.) 



T. bacchus, Forel. 

 Ann. Soc. Ent. Belg., vol. 54, p. 426, £ , 1910. 



" ^ . 3 - 7 mm. Mandibles smooth, shining, with small scattered 

 punctures, armed with 7 teeth, the posterior ones indistinct. Clypeus 

 without a carina, the anterior border emarginate in the middle. Head 

 as in guineense, but much wider, hardly longer than wide, distinctly 

 narrowed in front. Club of the antenna more slender, composed of 

 almost four joints. Thorax, especially the pronotum, decidedly wider 

 than in guineense, and much more convex lengthwise, submarginate ; 

 meso-epinotal suture a little stronger. Epinotal teeth more vertical, 

 a little shorter, wider at the base, not curved at the extremity ; 

 episternal teeth a little shorter. Nodes of the petiole thicker, wider 

 and more rounded than in guineense. The 1st node is not truncate in 

 front, but rounded, and with its peduncle forms a single concave curve 

 in profile ; it is also rounded and much less truncate behind. Sculpture 

 as in guineense, but closer, a little finer and less shining ; base of the 

 abdomen longitudinally striate. Pilosity as in guineense. Brownish- 

 red, legs paler ; abdomen a little darker, more yellowish-brown ; darker 

 than guineense excepting the abdomen, which is paler. 



"Natal (Haviland). Closely allied to guineense, but nevertheless 



