82 M. L. Peringuey's Descriptive Catalogue [Nov. 30, 



(the teeth more pronounced in the female), mentnm with a very 

 minute median tooth, third articulation of the labial palpi thickened ; 

 head very slightly broader than the prothorax, antennas fihform ; 

 prothorax short, sub-cylindrical,^ slightly impressed transversely in 

 front and behind, grooved in the centre, with the two sides of the 

 upper part of the disk a little raised, and finely plicated transversely ; 

 elytra elongated, nearly parallel in the male, ampliated past the 

 middle in the female, much acuminated behind and generally ending 

 in two sharp spines, very long and slightly divaricating in the male, 

 much shorter in the female ; legs long and very slender, anterior tibise 

 and all tarsi finely grooved on the upper part, the three first joints 

 of the fore-tarsi of the male dilated and ciliated. 



Cosmema occurs in the Eastern part of Cape Colony (Port 

 Elizabeth, Sunday Eiver, Albany, Graham's Town), Natdl (D'Urban, 

 Maritzburg), Zululand (Eshowe), Transvaal (Parys, Potchefstroom, 

 Eustenburg, Boksburg, Barberton, Lydenburg), British Bechuanaland, 

 Lake N'Gami, and Delagoa Bay. This genus has not, to my 

 knowledge, been found in the Western part of Cape Colony. 



Besides the South-African species, three more have been 

 described : one from East-Central Africa (Mamboia), one from, the 

 river Quango, and one from Somaliland. 



SYNOPSIS OF SPECIES. 



A. Outer margins of eljtra with yellowish- white, interrupted 

 lines or spots : 



Elytra depressed, shagreened, each with three narrow 

 yellowish- white supra-marginal bands in the male, two 

 only in the female. , . tri-notafa. 



Elytra deeply pitted, each with a supra-marginal, narrow, 

 yellow band reaching from the shoulder past the middle, 

 and a postical one. amhitiosa. 



Elytra deeply pitted, each with three oblong, yellow, supra- 

 marginal spots. sex-macMlata. 



Elytra deeply pitted, each with three very large, rounded 

 yellow supra-marginal spots. citreo-guttata. 



*The prothorax of C. tri notata is quadrate. 



