528 Transactions South African Philosophical Society, [vol. xiii. 



one of the most singular, among the singular species of this group of 

 Cetonides. 



They are found in the flowers of Protea mellifera, or other kindred 

 species, where they seemingly feed on the sugary liquid contained 

 in the cup-like inflorescences. 



Two species are recorded with certainty from South Africa. A 

 third one is supposed to be also South African, but there seems to 

 be good reasons to believe that it inhabits Senegambia. 



Key to the Species. 



Mentum vertical ; prothorax ampliata rounded ; post-coxal process 



of presternum small hottentotus. 



Mentum vertical but curving inwards at apex ; prothorax straight 

 laterally ; post-coxal process conspicuously tuberculated, truncate 

 at tip nigriclavis. 



Genuchus hottentotus, Fabric, 



Syst. Ent., p. 52; 



Gory and Perch., Monogr. d. Cet., p. 14, pi. 16, fig. 8 ; 



Oliv., Ent., i., 6, p. 56, pi. vii., fig. 35. 



cruentus, Fabr., Mant. Ins., i., p. 32. 

 sanguinolentus , McLeay, 111. Zool. S. Afr., hi., p. 18. 

 dealbatus, Dist., Ann. Nat. Hist., xix., 1897, p. 578. 



Black, glabrous, shiny, with the base of the prothorax and the 

 greatest part of the disk of the elytra reddish [cruentus, sanguinolen- 

 tus) or black with only a longitudinal streak of red on the dorsal part 

 of the elytra (hottentotus), or the basal part of the prothorax reddish 

 and the elytra black (dealbatus) ; at the apex of each elytron are two 

 small white patches, the outer one of which is sometimes continued 

 on the sides for a short distance ; head deeply impressed in the 

 centre and striolate, the basal keel is slightly bi-tuberculate in the 

 male, not in the female ; prothorax with the sides of the anterior 

 part striolate punctate, on the median and posterior part of the disk 

 the punctures are sparsely scattered, and there are a few only above 

 the base ; scutellum punctate at the base ; elytra slightly broader 

 than the prothorax and having on each side two deep striae next to 

 the suture, and two dorsal costae with two broad, deep intervals, 

 these intervals and the rest of the surface are deeply and broadly 

 punctate, but the costae bear only a few punctures ; pygidium 

 swollen, roundly keeled transversely, deeply punctate and bearing 

 occasionally two small macules ; under side punctate, central part 



