PTEROMALIDAE OF N.W. EUROPE 509 



cases also the marginal vein is at least 1 -5 times as long as the stigmal vein 



and the postmarginal vein is not longer than the stigmal • • • 55 



55 (54) Propodeum (Text-fig. 375) with posterior part of plicae converging slightly, 



but extending only a little way on to the sides of the nucha. Gaster hardly 

 as long as head plus thorax. POL not or hardly greater than OOL. Post- 

 marginal vein of fore wing slightly to distinctly longer than the marginal vein 



H. cioni Thomson (p. 526) 

 Propodeum (Text-figs. 383-389) with posterior part of plicae either virtually 

 parallel or, if converging somewhat, then extending nearly or quite to the 

 hind edge of the nucha. Gaster sometimes longer than head plus thorax. 

 POL sometimes distinctly greater than OOL. Postmarginal vein often 

 not longer than the marginal vein ........ 56 



56 (55) Antennal scape virtually as long as an eye, and reaching to, or even slightly 



above, level of vertex . . . . . . . . . -57 



- Antennal scape distinctly shorter than an eye, and not always reaching the 



level of the vertex .......... 58 



57 (56) Gaster at least as long as, but usually longer than, head plus thorax. Left 



mandible usually with three teeth, rarely with four .... 58 



- Gaster at least slightly shorter than head plus thorax. Both mandibles with 



four teeth ............ 88 



58 (57) Pronotal collar sharply margined over at least the middle third, sometimes 



throughout ........... 59 



- Pronotal collar imarginate, or at most very weakly margined in the middle . 72 



59 (58) Gaster lanceolate, slightly to much longer than head plus thorax. Marginal 



vein of fore wing 1 -6 to 2 times as long as the stigmal vein. Antennal scape, 

 except in one species, reaching to or above the level of the vertex . . 60 



- Gaster not longer than head plus thorax. Marginal vein often less than i-6 



times as long as the stigmal vein. Antennal scape often not reaching the 



level of the vertex .......... 70 



60 (59) Combined length of pedicellus and nagellum slightly less than the breadth of 



the head ............ 61 



- Combined length of pedicellus and nagellum equal to, or slightly greater than, 



the breadth of the head ......... 62 



61 (60) Gaster i-8 to 2-3 times as long as broad, only slightly longer than head plus 



thorax ; tergites bright green to blue-green. First funicular segment of 

 antenna (Text-fig. 390) at least slightly shorter than the pedicellus. Both 

 mandibles with four teeth . . . . .P. procerus sp. n. (p. 492) 



- Gaster 2-5 to 3-7 times as long as broad, slightly to much longer than head plus 



thorax ; tergites 2-3 (-4) partly to entirely purplish bronze. First funicular 

 segment usually as long as, or longer than, the pedicellus. Left mandible 

 with three teeth ....... H. dispar (Curtis) (p. 532) 



62 (60) Antennal scape not quite reaching the level of the vertex .... 63 



- Antennal scape reaching the level of the vertex or even slightly above it . 64 



63 (62) Gaster distinctly longer than head plus thorax. Combined length of pedicellus 



and flagellum usually not greater than breadth of head, very slightly greater 

 in occasional dwarfs. 



Propodeum, Text-fig. 383 ..... H. dispar (Curtis) (p. 532) 



- Gaster hardly longer than head plus thorax. Combined length of pedicellus 



and flagellum slightly greater than breadth of head . . H. sp. indet. C (p. 531) 



64 (62) Propodeum with nucha occupying rather more than one third the total length, 



strongly reticulate, rather more coarsely so than the panels of the median 

 area ; median area hardly 1-5 times as broad as long, its reticulation com- 

 posed of nearly isodiametric areoles ; occasionally some trace of a costula 



