PTEROMALIDAE OF N.W. EUROPE 353 



Key to European Genera 



(Females) 



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



Macropterous forms .......... 4 



(1) Antennal clava (Text-fig. 299) acute apically, with a terminal stylus ; pro- 



podeum as long as or slightly longer than scutellum, with a large reticulate 

 nucha which projects well beyond the bases of the hind coxae ; legs 

 including coxae, and gaster more or less, reddish yellow. Antennae with 

 three anelli and five funicular segments. Wing rudiments not project- 

 ing beyond propodeal nucha, truncate apically CALLITULA Spinola (p. 458) 

 Antennal clava obtuse or subobtuse apically. Propodeum sometimes shorter 

 or without a distinct nucha. Coxae dark, or only partly pale ; gaster not 

 pale-marked ............ 3 



(2) Propodeum only about half as long as scutellum, its nucha represented 



merely by a lunate or triangular area which is weakly sculptured or smooth ; 

 occiput not margined ; antennae with three anelli and five funicular 

 segments MERAPORUS Walker (p. 681) 



Propodeum longer than half the scutellum, with a moderate-sized to large 

 strongly reticulate nucha ; occiput margined except sometimes in small 

 specimens ; antennae most often with two anelli and six funicular seg- 

 ments EUPTEROMALUS Kurdjumov (p. 737) 



(1) Flagellum (Text-fig. 284) aberrant, with a slightly curved finger-like process 

 at the tip ; there are two anelli, followed by seven flagellar segments which 

 are not clearly differentiated into funicle and clava ; marginal vein of 

 fore wing very thick, only three to five times as long as broad 



RHAPHITELUS Walker (p. 420) 



Flagellum rarely with a terminal process, if so (Norbanus, Picroscytoid.es, 

 Callitula, Homoporus) then the process (Text-figs. 299, 301) is pointed, 

 and the flagellum is clearly differentiated into funicle and clava ; whilst 

 except in some Homoporus, the marginal vein is not thickened ... 5 



(4) Antennae with funicle fuscous, clava white. Marginal vein of fore wing 



rather thick, about three times as long as the stigmal vein. Funicular 

 segments subquadrate, or the distal ones slightly transverse ; clava 

 three-segmented, not acute at apex. Propodeum shiny, nearly smooth 



NEANICA Erdos (p. 422) 

 Antennae rarely with funicle dark and clava contrastingly pale. In such 

 cases the clava is yellowish, and either the marginal vein is only slightly 

 longer than the stigmal vein and the funicular segments are longer than 

 broad ; or else the antennal clava is acutely pointed, and the propodeum 

 distinctly sculptured .......... 6 



(5) Fore wing with marginal vein (Text-figs. 285, 286, 323) considerably thick- 



ened throughout, usually only three to five (occasionally six) times as long 

 as broad, sometimes a little thicker at its apex than at its base ... 7 



Fore wing with marginal vein either not or only slightly thickened, at least 

 about seven times as long as broad ; or thickened only in its proximal half 

 (Text-fig. 291) ........... 14 



(6) Antennae with first anellus somewhat longer than broad, longer than the 



second anellus ; clava, and sometimes distal segments of the funicle, 

 yellow. Pronotum more or less, and all coxae, yellow. First tarsal segment 

 of mid and hind legs very elongate, about nine times as long as broad and 

 two fifths the length of the hind tibia. 



