NOV 13 1905 



On the Hymenoptera of the Albany Museum, Grahamstown, 

 South Africa. 



By p. Cameron. 



(Third Paper).* 



SCOLIID^. 



The species of Plesia (olim 3Iyzine) appear to be well repre- 

 sented in South Africa. The females are easily enough separated; 

 but as regards the males they are at present in great need of a 

 thorough revision. To do the work thoroughly I should think 

 that a considerable number of specimens would be necessary, and 

 a critical examination of the types of Guerin, who has described 

 (Diet. pict. d'Hist. nat. v.) 14 species from North Africa (chiefly 

 from Egypt). My impression is that the species (males) should 

 be easily enough separated by structural characters— form, 

 sculpture, neuration— if the colouration and mai-kings be some- 

 what unsafe guides for specific discrimination. Size also appears 

 to be an untrustworthj' guide. 



Plfisia m/'kcnana, sp. nov. 



Black, shining, densely covered with long white hair, the 

 apex of the fore tibite and foi-e tarsi rufous ; wings fuscous, tinged 

 with violaceous, the nervures and stigma black. Underside of 

 flagellum of antennas, dark, the basal two-thirds of the mandibles 

 bright red. Female. 



*See also " On some new Genei-a and Species of Hymenoptera from 

 Cape Colony and Transvaal," Trans, of the South African Philosophical 

 Society, xv, pp. 195-257. 



