PTEROMALIDAE OF N.W. EUROPE 511 



sharply margined, then the propodeum has a longer nucha which is separated 

 from the median area by a shallower and less obviously costate constriction ; 

 often the antenna] scape does not reach the level of the vertex ... 72 



71 (70) Body green to golden green. Combined length of pedicellus and flagellum 



fully equal to breadth of head. Gaster as long as, or slightly longer than, 

 head plus thorax. Scutellum and mesoscutum moderately convex. 

 Femora and tibiae yellow . . . . H. chlorogaster Thomson (p. 534) 



- Body mainly coppery, with some parts, especially the gaster, fiery red. 



Combined length of pedicellus and flagellum slightly less than breadth of 

 head. Gaster slightly shorter than head plus thorax. Mesoscutum tending 

 to be somewhat flat ; scutellum weakly convex. Femora reddish to 

 brown ; tibiae usually partly reddish . . H. aureolus Thomson (p. 535) 



72 (70) Gaster much longer than head plus thorax. Propodeum (Text-figs. 385, 



386) with posterior part of plicae converging somewhat. Antennae with 

 first funicular segment usually as long as, or longer than, the pedicellus ; 

 scape reaching the level of the vertex or even slightly above it . . . 73 



- Gaster at most slightly longer than head plus thorax . . . . 74 



73 (72) Pronotal collar sloping forwards, in profile forming a slightly obtuse angle 



with the pronotal neck, tending to be somewhat rounded off in front. 

 Upper surface of mesoscutum in profile appearing distinctly curved. 

 Marginal vein of fore wing 1 -7 to 1 -85 times as long as the stigmal vein 



H. fascia tits Thomson (p. 538) 



- Pronotal collar nearly horizontal, abrupt in front, forming a right angle with the 



neck. Upper surface of mesoscutum in profile appearing hardly curved. 

 Marginal vein of fore wing 1 -35 to 1 -6 times as long as the stigmal vein 



H. semotus (Walker) (p. 529) 



74 (72) Median produced part of clypeus only very shallowly emarginate, without 



(Text-fig. 395) an impression above the emargination. Propodeum medially 

 distinctly less than half as long as the scutellum, its nucha (Text-fig. 387) 

 relatively short and with sculpture composed of transversely-lengthened 

 areoles. Pronotal collar sloping down somewhat, hence in profile forming 

 an obtuse angle with the neck ........ 75 



- Median produced part of clypeus either more distinctly emarginate (as in 



Text-fig. 394) ; or, if only slightly so, then the propodeum is at least 

 slightly more than half as long as the scutellum, and has a larger nucha 

 whose sculpture is composed of more nearly isodiametric areoles . . 78 



75 (74) Antennae with scape reaching to level of vertex, or even slightly above it ; 



toruli slightly nearer to median ocellus than to anterior margin of clypeus ; 

 proximal segments of funicle slightly longer than broad, the first slightly 

 longer than the pedicellus, distal segments at most slightly transverse 



H. sp. indet. E (p. 538) 



- Antennae with scape reaching only to about level of middle of the median ocel- 



lus ; toruli about equidistant from the median ocellus and the anterior 

 margin of the clypeus ; proximal segments of funicle usually subquadrate 

 with the first not longer than the pedicellus, occasionally the first is slightly 

 longer than broad and a little longer than the pedicellus ; distal segments 

 distinctly transverse .......... 76 



76 (75) Marginal vein of fore wing 1-75 to i-8 times as long as the stigmal vein ; 



postmarginal vein distinctly shorter than the marginal (Austria) 



H. sp. indet. F (p. 538) 



- Marginal vein 1-4 to i-6 times as long as the stigmal vein ; postmarginal 



vein nearly or quite as long as the marginal ...... 77 



