A Monograph of the Formicidae of South Africa. 277 



(63) 62. A slight trace of a scrobe present ; 2'5-2 - 9 mm. long . longoi, Forel. 

 (62) 63. A very distinct demi-scrobe present . . Ericae, Arnold. 



(55) 64. Epinotal teeth small, as large as or smaller than the episternal, or 

 nearly obsolete. 



(66) 65. First node, seen from the side, subcorneal ; its anterior margin strongly 



convex ; episternal teeth larger than the epinotal. 



simillimum, race isipingense, Forel. 

 (65) 66. First node merely slightly convex or even flat in profile ; its anterior 

 margin almost straight. 



(68) 67. Pro-mesonotum shining, almost smooth. 



simillimum, var. Poweri, Forel. 



(67) 68. Pro-mesonotum dull, distinctly sculptured. 



(70) 69. Scrobes entirely absent; the frontal carinae do not extend back 



beyond the middle of the head . pusillum, race tablense, Forel. 



(69) 70. Either a trace of a scrobe present, or the frontal carinae extend back 



nearly as far as the occipital margin. 



(72) 71. Dorsum of epinotum two and a half times longer than the declivity. 



pusillum, race ladismit7iensis, Forel. 



(71) 72. Dorsum of epinotum less than twice as long as the declivity. 

 (74) 73. Head slightly shining, not longer than wide; 2*5 mm. 



intextum, Santschi, var. cataractae, Santschi. 



(73) 74. Head dull, a little longer than wide ; 22 mm. . simillimum, Smith. 



The following species, which I have not seen, have been omitted 

 from the above key : Blochmanni, race Petersi, Forel ; bacchus, Forel • 

 titus, Forel ; setigerum, Mayr, i. sp. ; Emeryi, Mayr, i. sp. ; caespitum, 

 race Schnitzel, Forel ; Grassi,\a,v. laevigatum, Mayr, and var. simulans, 

 Santschi ; solidum, race lugubre, Forel ; Simoni, Emery ; sericeiventre, 

 race femoratum, Emery ; simillimum, races Bothae and delagoensis, 

 Forel ; guineense, var. erectum, Emery. 



T. quadkispinosum, Emery. 



Bull. Soc. Ent. Ital., vol. 18, p. 362, £ , 1886. 



$ . 3 - 3 mm. Dart brown or piceous ; the anterior half of the head 

 and the mesonotum lighter and more reddish-brown ; coxae, tibiae, 

 antennae, and mandibles dark reddish-yellow, tarsi brownish-yellow. 

 A few whitish and thick, blunt hairs on the clypeus, nodes, and 

 abdomen. Legs and antennae with a very sparse, short, and decum- 

 bent pubescence, the rest of the body without pubescence. 



Exceedingly minutely reticulate or alutaceous on the head, thorax, 

 and nodes, the sculpture of the head and epinotum being a little 

 stronger than the rest. In addition, the head is fairly strongly reti- 

 culate in front, between the eyes and frontal carinae. The vertex and 

 frons are also very finely and longitudinally striate. There are a few 



