380 M. W. R. de V. GRAHAM 



163 (162) Pronotal collar finely though sharply margined throughout ; basal tergite 



of gaster with a large patch of 20 or more hairs on each side 



TRICHOMALUS Thomson (p. 707) 

 Pronotal collar at most weakly margined in the middle ; basal tergite of gaster 



with few hairs at the sides . . . . . . . . .164 



164 (163) Mesoscutum and scutellum with delicate, for the most part engraved, reti- 



culation ; face receding strongly so as to form an angle of only about no° 

 with the frons ; antennae inserted level with ventral edge of eyes, all 

 funicular segments transverse . . . cf. NASONIA Ashmead (p. 779) 



- Mesoscutum and scutellum with stronger reticulation which is at least 



slightly raised above the general surface ; face not receding so strongly ; 

 antennae most often inserted above the level of the ventral edge of the 

 eyes ............ 165 



165 (164) Hind tibia with two very distinct spurs. Propodeum : plicae absent or 



represented only by weak convex elevations. Large species, 3-8 to 5 mm., 

 with elongate subconical gaster. Pronotal collar not margined, almost 

 rounded off in front. Both mandibles with four teeth [Central and 

 Southern Europe] STENETRA Masi (p. 474) 



- Hind tibia with only one spur. Propodeum nearly always with plicae 



which are at least sharp posteriorly, but often complete. Pronotal collar 

 sometimes margined, or with an abrupt front edge. Left mandible some- 

 times with three teeth . . . . . . . . .166 



166 (165) Propodeum with spiracular sulci shallow, alutaceous ; plicae at most sharp 



posteriorly, effaced in the middle, anteriorly represented only by foveae ; 

 fore wing with stigma (Text-fig. 315) rather large, separated by only about 

 1 -6 to 1 -8 times its height from the lower edge of the postmarginal vein, the 

 wing often with a fuscous mark or transverse band in the middle (at the edge 

 of the speculum) ; gaster elongate and conical, often reddish at the base ; 

 pronotal collar not or hardly margined PHAENOCYTVS gen. n. (p. 561) 



Propodeum (Text-figs. 373-389) : spiracular sulci rather deep, with some 

 transverse costulae or punctures ; plicae at least sharp posteriorly but 

 most often traceable as a fold or ridge to the base of the propodeum; 

 stigma of fore wing smaller, separated by at least twice its height from 

 the lower edge of the postmarginal vein, the wing immaculate or at most 

 indefinitely infumate ; gaster not reddish-marked ; pronotal collar 

 sometimes margined . . . . . . . . .167 



167 (166) Sutures of antennal clava not oblique, the clava with only a small area of 



micropilosity on its third segment ventrally HABROCYTUS Thomson (p. 494) 



and PTEROMAL US Swederus (p. 488) 

 Second suture of clava (seen in profile) distinctly oblique ; the area of 

 micropilosity on the third segment ventrally (Text-fig. 363) larger and 

 extending nearly half way to the base of the clava 



Sceptrothelys parviclava sp. n. (p. 487) 



168 (23) Hind corners of propodeum in dorsal view appearing prominent and sharp, 



rectangular or acute ; notauli most often traceable to hind margin of 

 mesoscutum even if superficial posteriorly ; pronotal collar rounded off in 

 front ............ 169 



Hind corners of propodeum in dorsal view not prominent, rounded off, 



notauli incomplete ; pronotal collar sometimes margined . . . 1 70 



169 (168) Notauli complete and fairly sharply impressed throughout ; gaster wholly 



alutaceous ; marginal vein of fore wing somewhat more than twice as 

 long as the stigmal vein ; propodeum without a distinctly-defined nucha, 

 plicae vague, costula absent . DORCATOMOPHAGA Kryger (p. 828) 



