A Monograph of the Formicidae of South Africa. 549 



wide median longitudinal groove, the posterior margin of the lateral 

 discs well denned. The 1st node is unarmed below. 



Pietermaritzburg (Simon) ; Estcourt, Natal (R. C. Wroughton). 

 Durban. (S.A.M., R.M., Gl. colls.) 



I have attached to this race a large number .of specimens from 

 Durban and neighbourhood, which have been wrongly recoi-ded by 

 Dr. Forel as C. excisa, Mayr, race Andrei, Forel (Bull. Soc. Vaud. Sc. 

 Nat., vol. 50, p. 236, 1914), and also his C. coelestis, Santschi, var. 

 Moofensis (loc. cit., p. 237). These specimens have 10-jointed antennae, 

 whereas the true Andrei (from the Congo) has 11 joints. In the 

 same place Forel describes several other varieties, also erroneously 

 placed with species of Gremastog aster s. str. These are dealt with 

 below. 



Fig. 55. — C. Liengmei, Forel, race Weitzaeckeri, Emery. 



Race Weitzaeckeri, var. Thais, Forel. 



(As var. of race Andrei) Ann. Soc. Ent. Belg., vol. 57, p. 126, <$ , 



1913. 



£ . 2"5-3'5 mm. Differs from Weitzaecheri by its more brownish 

 and paler colour. The head is much more convex above, especially in 

 its posterior half. The 2nd joint of the flagellum is clearly wider 

 than long, and the whole flagellum is a little shorter and thicker than 

 in the race. Otherwise similar. 



Port Elizabeth (Brauns) ; Grahamstown (Sherry). (S.A.M., R.M., 

 G.A. colls.) 



Race Weitzaeckeri, var. gordonensis, Forel. 

 Bull. Soc. Vaud. Sc. Nat., vol. 50, p. 236, £ , 1914. 



^ . 2 - 8-3 , 2 mm. This form is intermediate between Weitzaecheri 

 and var. acnnthobia, Forel. Like the former the 1st segment of the 

 petiole is wider than long, and the epinotal spines are fairly long and 

 thin ; it resembles acanthobia in having the steep declivity of the 

 mesonotum strongly concave transversely, even more so than in that 

 variety, the sides of the declivity standing out as distinct ridges. 



Gordon's Bav, Cape. Prov. (S.A.M., G.A. colls.) 



