10 Transactions South African Philosophical Society. [vol. xii, 



Malacca, and in Africa (Senegal, Guinea, Gaboon, Somaliland, and 

 Nyassaland). 



Key to the SjMcies. 



Lobe of the genae rounded laterally in front ; median part of 

 prothorax with a broad longitudinal groove enclosing a distinct 

 carina delegorguei. 



Lobe of the gense diagonal, not rounded in front and very dee^^ly 

 excavate ; median part of prothorax with a shallow, punctate median 

 groove validus. 



NiGIDIUS DELEGOEGUEI, ThomS., 



Plate XXXI., fig. 2. 

 Annal. Soc. Entom. d. Franc, 1862, p. 430. 



Male : Black, shining ; head not excavate, covered with round, 

 very closely set fovese, but the outer part of the horns on the 

 mandibles is smooth ; the apical angle of the head is very sharp 

 and dentate, under this angle there is also a sharp angular projection, 

 and the lobe of the gense which projects very much outside the eyes 

 is rounded in the anterior part ; prothorax nearly straight in front, 

 slightly emarginate in the anterior angle, sub-parallel for two-thirds 

 of the length and obliquely attenuate from there to the basal part, 

 and with the posterior angles much rounded; it is narrowly impressed 

 transversely along the anterior margin, and has in the centre of the 

 disk a deep sulcus stopping a little short of both apex and base and 

 enclosing a longitudinal, very distinct carina nearly as long as the 

 sulcus ; the walls of the furrow are smooth and the whole disk is 

 covered with deep, closely set foveate punctures which are closer 

 and more rugose laterally, and the smooth walls of which in the 

 discoidal part form a few smooth areolets ; scutellum with a few 

 punctures ; elytra cylindrical with the humeral angle projecting 

 sharply, very sharply carinate and with the intervals moderately wide, 

 deep and filled with a row of broad but shallow foveate punctures, 

 and having another row of narrower and deeper punctures set against 

 the side of the intervening carinate costae ; costge, abdomen, and 

 sternum deeply and closely foveolato-punctate, outer face of anterior 

 and posterior femora only slightly punctate, while that of the inter- 

 mediate ones is closely foveolate. 



Female : The female is a little smaller than the male and similar 



