PTEROMALIDAE OF N.W. EUROPE 791 



3 (1) Antennae (Text-fig. 651) inserted well above level of ventral edge of eyes, their 



toruli about equidistant from the anterior margin of the clypeus and the 

 median ocellus ; head hardly protuberant at level of toruli. Head in dorsal 

 view (Text-fig. 650) strongly transverse, about 2-25 times as broad as its 

 maximum length, with temples hardly one sixth as long as eyes. Propodeum 

 (medially) hardly half as long as scutellum ; its median area about 1 -8 times as 

 broad as long, the panels finely reticulate. Thorax squat, about 1-4 times as 

 long as broad. Gaster with a yellowish band across the basal tergite ; 

 venter extensively pale. (Czechoslovakia) . . . slovacus sp. n. (p. 793) 



Antennae (Text-fig. 652) inserted less high, their toruli slightly nearer to the 

 anterior margin of the clypeus than to the median ocellus ; head somewhat 

 protuberant at level of toruli. Head in dorsal view 2-215 times as broad as 

 long, with temples one fifth to more than one quarter as long as eyes. Pro- 

 podeum (medially) slightly more than half as long as the scutellum ; its 

 median area 1-5-1 7 times as broad as long, the panels often rather coarsely 

 reticulate. Thorax often more elongate, 1-4-1-7 times as long as broad. 

 Gaster sometimes immaculate ......... 4 



4 (3) Antennae with combined length of pedicellus and flagellum usually slightly less 



than, rarely almost equal to, the breadth of the head. Costal cell of fore wing 

 9~9'5 times as long as broad. Gaster without pale markings ; 1-5-1-7 times 

 as long as broad, slightly shorter than head plus thorax .... 5 



Combined length of pedicellus and flagellum slightly greater than the breadth 

 of the head. Costal cell of fore wing 10-5-11 times as long as broad. Gaster 

 often with a pale transverse band on the basal tergite, sometimes the whole 

 base yellowish ; sometimes relatively longer than in the above ... 6 



5 (4) Head in dorsal view (Text-fig. 653) 2-2-1 times as broad as long. Panels of 



median area of propodeum rather more coarsely reticulate (Europe) 



discoideus (Nees) (p. 795) 

 Head in dorsal view 2-15 times as broad as long. Panels of median area of 

 propodeum rather more finely reticulate (Amurland) 



megaspilus (Walker) (p. 795) 



6 (4) Larger species, up to 34 mm. in length. Gaster 18-2 15 times as long as broad, 



at least very slightly longer than head plus thorax. 



Antenna, Text-fig. 652 .... maculipennis (Walker) (p. 794) 



Smaller species, up to 2-3 mm. in length. Gaster 1-55-1-65 times as long as 



broad, at least slightly shorter than head plus thorax. . . . sp. indet. 



(Males) 



1 Antennal formula 11 263 (Text-fig. 649) with combined length of pedicellus and 



flagellum only equal to breadth of head ; pedicellus about twice as long as 

 broad, as long as or slightly longer than the first funicular segment ; second 

 anellus distinctly longer than the first ; funicle stout, with very short and 

 subdecumbent hairs, funicular segments relatively short, the first at most 

 twice as long as broad, the sixth subquadrate to slightly transverse. Eyes 

 large, separated by only about 1-15 times their length ; malar space hardly 

 one third the length of an eye. Antennae inserted only slightly above level 

 of ventral edge of eyes. Propodeum with plicae weak or incomplete ; 

 costula absent. Fore wing in one species shortened and narrow, with a 

 fuscous cloud below the stigmal vein, often also with the apical margin of the 



wing infuscate. {ANARTHROLYTUS sgen. n.) 2 



Antennal formula most often otherwise ; combined length of pedicellus and 

 flagellum at least 1-3 times the breadth of the head ; pedicellus at most 1-5 



