PTEROMALIDAE OF N.W. EUROPE 339 



the ovipositor sheaths, as long as or slightly longer than head plus thorax ; 

 ovipositor sheaths exserted to a length equal to half that of the hind tibia 

 or slightly more. Head and thorax black with weak metallic reflections 



varicornis Haliday (p. 348) 

 Antenna (Text-fig. 278) with fifth flagellar segment with sensilla and with two 



to three rows of bristles, at most about 1 -5 times as broad as long . . 7 



(6) Fore wing with basal cell with a large patch of hairs in its apical portion, on 



upper surface of wing ; exserted part of ovipositor sheaths (Text-fig. 274) 

 two thirds to three quarters the length of the hind tibia. Antenna (Text-fig. 

 278) with flagellar segments one to four relatively less transverse, their 

 combined length equal to or even slightly greater than the length of the 

 pedicellus. Head and thorax conspicuously metallic, green, blue-green, or 

 bronze-green ....... pallidum sp. n. (p. 345) 



Fore wing with basal cell with only a few hairs in its distal portion, most of 

 them on the basal vein ; exserted part of ovipositor sheaths at most slightly 

 more than one third the length of the hind tibia. Antenna (cf. Text-figs. 

 279, 280) with flagellar segments one to four relatively more transverse, 

 their combined length at least slightly less than the length of the pedicellus. 

 Head and thorax sometimes with only weak metallic reflections . . 8 



(7) Thorax in profile only weakly arched dorsally, scutellum appearing flat or 



nearly so ; gaster with tip of hypopygium situated nearly level with the 

 apex of the last tergite. Eyes 1 -6 to 1 -65 times as long as broad. Flagellar 

 segments one to three distinctly separated from each other 



chalybea Haliday (p. 349) 

 Thorax in profile rather more distinctly arched, scutellum slightly convex ; 

 tip of hypopygium not so near the level of the apex of the gaster. Eyes 1 -4 

 to 1 5 times as long as broad. Flagellar segments one to three closely com- 

 pacted as in conjungens (cf. Text-fig. 279), sometimes virtually fused . . 9 



(8) Hind tibial pecten hardly developed, much as in <J paludum (Text-fig. 281). 



Head and thorax with strong greenish to blue reflections ; knees distinctly 

 testaceous ....... herbacea sp. n. (p. 346) 



Hind tibial pecten (Text-fig. 283) well-developed and regular, extending over 

 whole length of tibia except its proximal quarter. Head and thorax with 

 weak bluish reflections, sometimes stronger on head ; at least mid and hind 

 knees not or hardly at all pale .... graminea Haliday (p. 347) 



(Males) 



Fore wing with speculum, on lower surface, nearly effaced by scattered hairs, 

 on upper surface small and not extending farther than middle of marginal 

 vein. Antenna (Text-fig. 275) characteristic ; clava distinctly shorter 

 than the funicle ; flagellar segments not transverse, or at most the three 

 proximal ones slightly so ; scape strongly swollen, with an apical excision 

 which extends more than one third down the scape. Hind tibia without a 

 pecten. Eyes small, with facets of uniform size ; separated from the 

 posterior ocelli by fully twice the diameter of an ocellus bouceki sp. n. (p. 350) 



Fore wing with speculum, on lower surface, at most partly effaced, on upper 

 surface large and extending, as a bare strip below the marginal vein, as far 

 as the stigmal vein. Antenna (Text-figs. 279, 280) with clava as long as or 

 longer than the funicle ; at least the three proximal flagellar segments 

 quite strongly transverse ; scape often slender, but if strongly swollen, 

 then its apical excision extends hardly one third down the scape. Hind 

 tibia with at least a slightly developed pecten (Text-figs. 281-283). 

 Eyes sometimes enlarged ......... 2 



