PTEROMALIDAE OF N.W. EUROPE 33 



(33) Inner orbits of eyes (Text-fig. 41) diverging strongly ventrad, at an angle of 



20 to 45 to the vertical axis of the head. Antennae either with one 

 anellus and seven funicular segments ; or without anelli but having eight 

 funicular segments .......... 49 



Inner orbits of eyes parallel or diverging only slightly. Antennae almost 

 always with two or three anelli, and rarely more than six funicular segments ; 

 if there are seven or eight funicular segments, then nearly always two anelli 

 are present. ........... 35 



(34) Brachypterous or apterous species (some Callitula, Meraporus, Leptomera- 



porus, Arthrolytus, Nasonia, Platypteromalus and Eupteromalus) 



PTEROMALINAE (part) (p. 352) 

 Macropterous species .......... 36 



Antennae 10-, 11-, or 12-segmented ........ 37 



Antennae 13-segmented ......... 38 



Antennae without anelli or with only one anellus ; clava neither acutely 

 pointed nor with an apical process, two- or three-segmented 



MISCOGASTERINAE (part) (p. 95) 

 Antennae with two or three anelli ; clava (Text-figs. 299-301) acutely pointed, 

 acuminate, or with an apical process, usually solid or indistinctly seg- 

 mented {Callitula, Merisus ; some Homoporus, Norbanus and Picroscytoides 



would run here) PTEROMALINAE (part) (p. 352) 



(36) Axillae (Text-fig. 58) produced forwards far in advance of the scutellar base, 

 the latter broad. Fore wing (Text-fig. 46) with stigmal vein very short, the 

 stigma almost sessile, marginal vein three to four times as long as the 

 stigmal vein, postmarginal vein relatively short. Hind tibiae (Text-fig. 45) 

 somewhat compressed, their posterior edge with a row of spines, two 

 strong apical spurs present of which the second is only slightly shorter 

 than the first ; hind coxae very long, at least three quarters as long as their 

 femora, the latter compressed. Spiracles of propodeum touching the 

 metanotum, the latter often covering the front part of the spiracular rim. 

 Last two or three segments of female gaster clothed with dark bristles. 

 Antennal formula 11263 in female, n 353 in male 



COLOTRECHNINAE (p. 850) 

 Axillae very rarely produced so far in advance of the scutellar base, if so then 

 the latter is narrower. Venation of fore wing usually quite unlike the above, 

 if somewhat similar then the hind tibiae have no spines along their 

 posterior edge, and have only one apical spur, whilst the hind coxae are 

 relatively shorter and the propodeal spiracles are at least slightly separated 

 from the metanotum ......... 39 



(38) Antennae inserted high on the head, their toruli nearer to the median ocellus 



than to the anterior margin of the clypeus ...... 40 



Antennae inserted at a lower level, their toruli either midway between the 

 median ocellus and the anterior margin of the clypeus, or nearer to the 

 latter ............ 41 



(39) Marginal vein of fore wing 4 to 4-5 times as long as the stigmal vein ; costal 



cell narrow, 12 to 20 times as long as its maximum breadth 



PANSTENONINAE (p. 92) 

 Marginal vein of fore wing less than three times as long as the stigmal vein ; 



costal cell relatively broader than in the above . . . . .41 



(40) Marginal vein of fore wing (Text-figs. 285, 286, 291, 323, 324) conspicuously 



thickened, either throughout or in its proximal half 



PTEROMALINAE (part) (p. 352) 

 Marginal vein of fore wing not conspicuously thickened .... 42 



