On some South African Dermaptem (Earwigs). 



15 



Abdomen not hairy, sub-parallel, deep ferruginous red, darker 

 apically than basally, the lateral pliciform tubercles black and 

 prominent. 



Last dorsal segment $ quadrate, ample, smooth, with no median 

 sulcus, but a deep triangular depression in the middle near the 

 posterior margin, which is slightly incrassate and sinuous, being 

 gently produced to form a short rounded lobe on each side of the 

 middle line. 



Penultimate ventral segment $ ample, very obtusely rounded. 



Pygidium $ a square, depressed plate. 



vi- 



FIG. 9. (a) A. colonise <? type ; I forceps ; (c) tarsus. 



Forceps with the branches $ slender, remote at the base, 

 rather elongate, slightly diverging at the base itself, then very gently 

 arcuate, the tips black and feebly incurved ; on the inner margin at 

 the base there is a prominent, dilated, and depressed triangular 

 tooth. 



South Africa: 4 $ , Cape Town, August, 1887. 



This species closely resembles the European A. albipennis, but 

 the pronotum is longer and narrower, the pygidium more nearly 

 square, and the strong basal tooth of the forceps is very distinctive. 



