A Monograph of the Formicidae of South Africa. 663 



(12) 9. Clypeal lobe with 3 obtuse teeth on its anterior margin. 



(11) 10. Mandibles with 6 teeth ; abdomen blackish . . nasutus, Emery. 



(10) 11. Mandibles with 5 teeth; abdomen brownish ochreous 



nasutus, race subnasutus, Arnold. 

 (9) 12. Clypeal lobe with 5 obtuse teeth. 

 (14) 13. Mandibles with 6 teeth . . nasutus, var. quinquedentata, Forel. 



(13) 14. Mandibles with 5 teeth . . nasutus, var. pretiosa, Arnold. 



C. emarginatus, Emery. (Plate IX, fig. 148). 

 Bull. Soc. Ent. Ital. vol. 18, p. 356, % £, 9, c? 1 . 1886. 



2J., 5-6*5 mm. Dark reddish ochreous, the sides of the thorax, 

 the declivity and the pro-mesonotal suture more or less brownish; 

 abdomen brown. Mandibles ferruginous, the masticatory margin 

 black. Shining, the anterior half of the head a little duller than 

 the rest. 



Microscopically rugulose on the thorax and abdomen; the head a 

 little more strongly rugulose, the anterior third especially the cly- 

 peus, reticulate, the cheeks with some scattered and shallow punct- 

 ures. Pubescence decumbent and exceedingly fine and sparse on 

 the head, more abundant on the legs and antennae, absent from the 

 rest of the body. Pilosity yellowish, very sparse. 



Head subquadrate, one-sixth longer than wide, parallel-sided, 

 narrowed only over the anterior 8th, the posterior margin convex, 

 the posterior angles moderately rounded; seen from the side, the 

 head is subtruncate behind. Mandibles shining, sparsely and coar- 

 sely punctured, 5-dentate. Clypeus convex transversely but not 

 carinate, the lobe short and arcuately emarginate, the emargination 

 bounded on each side by a broad and truncate tooth which is wider 

 than long. Frontal area indistinct behind. Frontal carinae widely 

 divergent, the distance between them behind being equal to their 

 length. Eyes large, flat, placed behind the middle and occupying 

 one-fourth of the sides. A trace of the median ocellus is present. 

 (Emery gives no information as to the length of the scapes, and in 

 the only specimen before me, these have become detached). Sides 

 and front of the pronotum steep, the dorsum of the segment convex 

 transversely. Mesonotum a little wider than long. Metanotum fairly 

 distinct, short. Dorsum of epinotum a little longer than wide, very 

 slightly oblique, as long as the steep declivity, which it joins in a 

 widely rounded angle. Scale of petiole thin, ovate, nearly flat 

 behind, slightly convex in front. Tibiae very slightly compressed, 

 with a few setae below. 



