PTEROMALIDAE OF N.W. EUROPE 643 



- Tip of hypopygium situated at most slightly more than half way along the 



gaster, but usually not more than half way ; the gaster sometimes much 

 longer than head plus thorax . . . . . . . . 16 



15 (14) Mesoscutum with several shallow but distinct piliferous punctures visible 



amongst the reticulation, 1 -6 to 1 -8 times as broad as long. Thorax squat, 

 hardly 1 -5 times as long as broad ....... 29 



Mesoscutum without piliferous punctures, 1-3 to 1-5 times as broad as long. 



Thorax i-6 to 1-7 times as long as broad. ...... 42 



16 (14) Gaster at least slightly longer than head plus thorax, usually more than twice 



as long as broad .......... 17 



Gaster not longer than head plus thorax, at most twice as long as broad . . 27 



17 (16) Anterior margin of clypeus deeply emarginate or incised medially (Text-figs. 



526, 528) . 18 



Anterior margin of clypeus shallowly emarginate medially .... 19 



18 (17) Gaster 1-5 to i-6 times as long as head plus thorax maculicornis (Giraud) (p. 667) 



- Gaster at most about 1-2 times as long as head plus thorax . . . 12 



19 (17) Marginal vein of fore wing normally only 1-3 to i-6 (rarely 1-7) times as long 



as the stigmal vein. Combined length of pedicellus and flagellum nearly 

 equal to breadth of head. Head and thorax usually bronze to coppery, 

 occasionally green. 



Median area of propodeum, text-fig. 542 . . aspilus (Walker) (p. 669) 



Marginal vein i-8 to 2-3 times as long as the stigmal vein. Combined length 



of pedicellus and flagellum usually slightly less than breadth of head . . 20 



20 (19) Gaster 3 to 3-5 times as long as broad, 1-3 to 1-5 times as long as head plus 



thorax. Pedicellus in dorsal view about 2-5 times as long as broad. Head 

 in dorsal view (Text-fig. 545) 2-15 to 2-25 times as broad as long. Propo- 

 deum medially less than half as long as the scutellum ; its median area 1 -8 

 to 2 times as broad as long (Text-fig. 541) . rhabdophagae (Graham) (p. 667) 

 Either the gaster is at most 2-7 times as long as broad ; or, if longer, then the 

 pedicellus in dorsal view is only 1 -8 to 2 times as long as broad, and the head 

 is only 1-9 to 2 times as broad as long, sometimes also the propodeum is 

 about half as long as the scutellum with its median area at most 1-5 times 

 as broad as long ........... 21 



21 (20) Pronotal collar (cf . Text-fig. 532) relatively long, medially one seventh to slightly 



more than one sixth as long as the mesoscutum, rather coarsely reticulate. 

 Combined length of pedicellus and flagellum nearly or quite equal to breadth 

 of head. Head and thorax bright green to blue-green. Head in dorsal 

 view only 1-9 to 2 times as broad as long. ...... 22 



Either the pronotal collar, medially, is only one eleventh to one eighth as long 

 as the mesoscutum ; or if about one seventh, then the combined length of 

 the pedicellus and flagellum is distinctly less than the breadth of the head, 

 whilst the head and thorax are bronze- to coppery green ... 23 



22 (21) Propodeum medially about half as long as the scutellum ; its median area 



only 1-35 to 1-4 times as broad as long. Head in dorsal view with temples 

 about one quarter as long as eyes . . pseudofuscipes v. Rosen (p. 667) 



- Propodeum medially less than half as long as the scutellum ; its median area 



1 -7 to 1-9 times as broad as long. Head in dorsal view (fig. 530) with temples 

 about one third as long as eyes . . ? semiclavatus (Ratzeburg) (p. 671) 



23 (21) Eyes relatively large, separated by only about their own length. Head and 



thorax golden green, green, or blue-green. Marginal vein 2-2 to 2-3 times 



as long as the stigmal vein ......... 12 



- Eyes relatively smaller, separated by 1 -15 to 1 -2 times their own length. Head 



