Annals of the So^(th African Museum. 



Key to the Species represented in the Collection. 



MALES. 



A v . Frontal part ending in a strong tubercle. Mandibles greatly 

 developed, clypeus simple. 



B'. Anterior tibiae with one median spine .... . truncatifrons 



]}'. Anterior tibiae with two median spines. 



Body, minus the vertex, rufescent . . . mimus 



Body, minus the vertex, quite black ... . monachus 



A 1 . Frontal part not tuberculated. 



B 1 . Anterior tibiae with two median spines. 



Mandibles greatly developed, sides of clypeus strongly dentate lechuanus 



NASIDIUS MIMUS, u. sp. 



(J. Head as much developed as iu the large examples of N. 

 truncatifrons, but completely brick-red ou the vertex, whereas in 

 truncatifrons it is often ivory-white ; the body is also less fuscous 

 metallic ; the two upper spines on the fore tibiae are strong and closely 

 set. 



? . In the fern ale the oviduct, although short, is a little longer than 

 the labrum. 



Long. corp. 43, ? 41 mm. 



Length of body, <$ 43 mm., ? 41 mm. ; of hind femur, $ 19 mm., 

 of ? 16 mm. ; of ovipositor 1H-12 mm. 



Hab. Cape Province (Transkei). H. P. Abernethy ; F. C. Kolbe. 



NASIDIUS BECHUANUS, n. sp. 



<$ . Flavescent; head with a median infuscate patch, pronotuin 

 flavous with two transverse ill-defined but broad fuscous bands; 

 abdomen fuscous metallic on the dorsal part, but flavescent on the 

 ventral ; legs flavescent, upper outer part of the hind femora slightly 

 darker. 



Head broad, fastigium not tuberculate between the antennae; 

 mandibles strongly developed, somewhat compressed, bluntly tuber- 

 culate at base, strongly incurved at middle, somewhat dilated thence 

 to the apex and with an inner triangular expansion before the five- 

 dentate apex ; labrum very broad at base and apex, and moderately 

 deeply constricted slightly before the centre ; the edge of the clypeus 

 is prolonged laterally on each side in a triangular, sharply acuminate, 

 sub-horizontal process not extending much beyond the genae, and not 

 unlike the horns of a young ox ; antennae concolorous, stramineous ; the 

 saddle-like pronotuin is smooth, as is the rest of the body ; the anterior 



