PTEROMALIDAE OF N.W. EUROPE 387 



very narrow and inconspicuous. Bristles along the posterior edge of the 

 hind tibiae not unusually short or spine-like. Fore wing with marginal 

 vein usually at least slightly shorter than, occasionally as long as, the 

 stigmal vein, and tending to be somewhat thickened towards the base ; wing 

 sometimes immaculate, sometimes with dusky clouds below the parastigma 

 and the stigma .... CAENOCREPIS Thomson (p. 429) 



Anterior margin of clypeus shallowly emarginate medially. Pronotal collar 

 distinctly less wide than the mesoscutum ; thorax in dorsal view obviously 

 longer than broad. Postspiracular sclerite broad and conspicuous. Hind 

 tibiae (cf. Text-fig. 322) with a row of short spines along their posterior 

 edge. Fore wing with marginal vein at least very slightly longer than the 

 stigmal vein, not thickened ; wing with two fuscous clouds, one below the 

 parastigma, the other lying across the stigmal vein 



CHEIROPACHUS Westwood (p. 416) 



205 (124) Pronotal collar margined anteriorly. Hind tibia with one apical spur 



DINOTISCUS Ghesquiere (p. 409) 

 — Pronotal collar not margined. Hind tibia with one or two apical spurs . 206 



206 (205) Hind tibia with two apical spurs ; pronotum with a short subhorizontalcollai, 



in front of this falling steeply to the neck ACROCORMUS Forster (p. 415) 

 Hind tibia with one apical spur ; pronotum without a distinct subhorizontal 



collar, but rounded off into the neck region RHOPALICUS Forster (p. 412) 



Key to most European Genera 

 (Males) 



The following genera are not included in the key because their males are unknown to me; in 

 some cases they have not yet been recognized : 



Gygaxia Delucchi, Platecvizotes Boufiek, Nikolskayana Boucek, Neanica Erdos, Gbelcia Boufiek, 

 Stinoplus Thomson, Trychnosoma Graham, Heteroprymna Graham, Metastenus Walker, Mokr- 

 zeckia Mokrzecki, Eurydinota Forster, Aggelma Delucchi. 



The males of many Pteromalinae species are less well known than the females, and often 

 present poor characters which make tabulation difficult. However, in some cases they show 

 more obvious features than their females, and this may be useful if one has a bred series of 

 both sexes, when the key to males can be used as a check against the key to females. Hence 

 it was thought worthwhile to include the following key to males, although the writer is very 

 conscious of its imperfections. 



1 Brachypterous forms .......... 2 



Macropterous forms .......... 8 



2 (1) Face, frons, and vertex with a pattern formed by a sinuous smooth line 



(Text-figs. 325-327) .3 



Face and frons without such a pattern ; very rarely the temples may have a 



smooth band extending from mandibular base to vertex (Text-fig. 574) . 4 



3 (2) Antennal flagellum rather stout, subfusiform ; fifth flagellar segment fully 



as broad as the pedicellus ; anelli transverse ; proximal segments of funicle 

 usually slightly transverse. Pattern of head, Text-fig. 325. Both mandibles 

 with four teeth. Pronotum and mesoscutum, Text-fig. 330 



MERAPORUS Walker (p. 681) 

 Antennal flagellum (Text-fig. 329) clavate, proximally slender with fifth 

 flagellar segment less broad than the pedicellus ; anelli as long as broad ; 

 segments one to four of funicle quadrate or even very slightly longer than 

 broad. Pattern of head, Text-figs. 326, 327. Left mandible with three 

 teeth, right mandible with four. Pronotum and mesoscutum, Text-fig. 328 



LEPTOMERAPORUS Graham (p. 687) 



