514 M. W. R. de V. GRAHAM 



the eyes. Mesoscutum more coarsely reticulate, especially posteriorly 

 where its reticulation is much coarser than that of the scutellum. Head and 

 thorax green ...... P. squamifer Thomson (p. 491) 



- Head in dorsal view 2-2 to 2-35 times as broad as long ; POL equal to or very 



slightly greater than OOL ; temples at most slightly more than half as 

 long as the eyes. Mesoscutum usually more finely sculptured with the 

 reticulation of its posterior part not much coarser than that of the scutellum, 

 if much coarser, then the head and thorax are dark green or bronze . . 92 



92 (91) Gaster at least slightly longer than the thorax, acute at apex. Propodeum 



usually with some trace of a median carina. Postmarginal vein 1-2 to 1-35 

 times as long as the marginal vein . . P. bifoveolatus Forster (p. 490) 



- Gaster usually slightly shorter than the thorax, occasionally as long as the 



thorax in small specimens, bluntly pointed at apex. Propodeum with 

 median carina nearly always absent, rarely very vaguely indicated in part. 

 Postmarginal vein i-i to 1-2 times as long as the marginal vein 



P. puparum (L.) (p. 489) 



93 (49) Fore wing with basal cell, at least mainly, bare ; speculum open below. Hind 



wing with costal cell bare to level of beginning of marginal vein. Gena 

 without a hollow above the base of the mandible. Head and dorsum of 

 thorax slightly shiny, with relatively weaker sculpture 



H. platyphilus (Walker) (p. 524) 



- Fore wing with basal cell hairy all over ; speculum closed below except 



proximally. Hind wing with costal cell with a few hairs before the beginning 

 of the marginal vein. Gena with a narrow hollow above the base of the 

 mandible. Head and dorsum of thorax duller with relatively stronger 

 sculpture ...... H. crassicornis (Zetterstedt) (p. 523) 



HABROCYTUS and PTEROMALUS 



Key to Males of Some European Species 



Edge of oral fossa, on either side of the clypeus, with a projecting flange rather 

 like that of Rohatina inermis (Text-fig. 572) ; breadth of oral fossa about 

 twice the malar space. Antenna with flagellum with subdecumbent hairs ; 

 segments of funicle often annulated, each segment partly pale, partly 

 fuscous ; combined length of pedicellus and flagellum less than breadth of 

 head. Propodeum more than half as long as the scutellum, with a distinct 

 reticulate nucha . . . . . H. ? platyphilus (Walker) (p. 524) 



Edge of oral fossa without projections. Antennal flagellum often with 

 moderately outstanding hairs ; segments of funicle not annulated with 

 contrasting colours ; combined length of pedicellus and flagellum most often 

 as great as, or greater than, the breadth of the head. Propodeum some- 

 times shorter, or with a less distinctly developed nucha .... 2 

 (1) Base of mandible forming a large convex plate (as in Text-fig. 337) with only 

 a narrow lunate gap between it and the gena ; oral fossa enlarged, its 

 breadth about six times the malar space. Postspiracular sclerite fairly 

 strongly reticulate except along its edges H. conopidarum (Boucek) (p. 559) 



Base of mandible normal, not forming a large convex plate ; breadth of oral 

 fossa not more than 4-3 times the malar space except in two species which 

 have a large subcircular pit (Text-fig. 338) between base of mandible and 

 gena. Postspiracular sclerite more weakly and irregularly sculptured, 

 sometimes nearly smooth ......... 3 



