252 M. W. R. de V. GRAHAM 



9 (8) Gaster of female (Text-fig. 201) with the hypopygium extending far caudad 

 and ending in a membranous mucro (m). Dorsal surface of hind coxae with 

 indications of a longitudinal crest. Median carina of propodeum strongly 

 raised, crossed at about the middle of its length by a transverse crest which 

 in profile appears dentiform. Body black, or black with a weak bluish 

 tinge ; length 2 to 3 mm. . . . MELANCISTRUS gen. n. (p. 266) 



Gaster of female with the hypopygium extending at most about half way 

 along, and without a mucro. Dorsal surface of hind coxae without a 

 longitudinal crest. Median carina of propodeum (when present) not stongly 

 raised, and not traversed by a crest. Body most often distinctly metallic, 

 rarely black or nearly so . GASTRANCISTRUS Westwood (p. 270) 



[see also MEROMALUS Walker] 

 10 (7) Mesoscutum and scutellum relatively shiny, their reticulate sculpture hardly 

 raised above the general surface ; with several piliferous punctures which, 

 even if small, are clearly visible, but most often they are very conspicuous. 

 Anterior margin of clypeus slightly curved, tending to be produced slightly 

 ventrad of the lower edge of the genae. Except in one species, each gastral 

 pygostyle has one of its bristles conspicuously longer than the others. Fore 

 wing : pilosity of disc extending to near the marginal vein at least below 

 the distal half of the vein . . . SEMIO TELL [AS Westwood (p. 254) 

 - Mesoscutum and scutellum relatively dull, their reticulate sculpture dense and 

 distinctly raised above the general surface ; piliferous punctures minute 

 and scattered, not easily seen on account of the dense reticulation. Anterior 

 margin of clypeus truncate ; lower edge of genae adjacent to clypeus 

 produced slightly ventrad of its anterior margin. Bristles of gastral 

 pygostyles not very dissimilar in length. Fore wing (Text-figs. 195, 196) 

 with a broad bare strip, upon which is situated a row of long hairs, below 

 the marginal vein SYSTASIS Walker (p. 257) 



ORMOCERUS Walker 



Ormocerus Walker, 1834 : 168. Type-species : 0. vernalis Walker, by designation of Westwood, 



1839 : 69. 

 Ormocerus Walker; Westwood, 1839 : 69. 

 Hormocerus Forster, 1856 : 59, 60 [emendation]. 



Terobia Forster, 1878 : 64. Type-species : T. dispila Forster, by monotypy. 

 Terobia Forster ; Ashmead, 1904 : 274, 275. 

 Terobia Forster ; Schmiedeknecht, 1909 : 275, 276, 283. 

 Terobia Forster ; Nikol'skaya, 1952 : 239-240. 

 Ormocerus Walker ; Delucchi, 1955a : 175. 

 Ormocerus Walker ; Askew, 1961a : 193-195. 

 Ormocerus Walker; Boucek, 1961 : 64. 



The type-species of Terobia {dispila Forster) was synonymized with Ormocerus 

 vernalis Walker by Delucchi (1955 : 175). Until then the genus Ormocerus had been 

 misinterpreted (e.g., by Ashmead (1904), Schmiedeknecht (1909) and Nikol'skaya 

 (1952), who followed Thomson). Thomson's supposed Ormocerus (1876a : 220, 

 242) was in fact Seladerma (=Isoplala) geniculata (q.v.). 



Key to European Species 



1 Female. Fore wing with two fuscous clouds (one below the parastigma, the other 

 below the stigma) which sometimes join on the disc of the wing ; basal cell, on upper 



