PTEROMALIDAE OF N.W. EUROPE 27 



Either the clypeus is wholly radiately strigose ; or its anterior margin is 

 bilobed, and the hind tibia has two spurs ; or the antennal formula is 

 different ............ 12 



Either the head and thorax are yellow and black, non-metallic ; or the 



antennal formula is 1 1 173 . . . MISCOGASTERINAE (part) (p. 95) 



Head and thorax usually metallic, if non-metallic then without yellow mark- 

 ings ; antennal formula otherwise . PTEROMALINAE (part) (p. 352) 



Females with tarsi heteromerous, mid tarsi with only four segments ; fore and 

 hind tarsi with five ; face with a longitudinal impressed line on either side, 

 each lying somewhat mesad of its corresponding malar sulcus, extending 

 from the eye towards the oral edge ; postspiracular sclerite imperfectly 

 developed and not distinctly separated from the mesopleuron, sometimes 

 apparently absent ; antennal formula 11 172. Males with face with longi- 

 tudinal impressed lines like those of the female ; postspiracular sclerite as 

 described for females; antennal formula 11173 or 11182. Body and 

 appendages, Text-figs. 49, 61-66 .... MACROMESINAE (p. 42) 



Females with tarsi not heteromerous, all with five segments ; face, except in 

 some species of the exotic genus Belonea, without longitudinal impressed 

 lines like those described for Macromesinae ; postspiracular sclerite 

 distinctly separated from the mesopleuron by a suture, sometimes very 

 small or narrow but often large. Males with face lacking longitudinal 

 impressed lines like those described above ; postspiracular sclerite as in 

 females. Antennal formula most often otherwise ..... 14 



Males only with eyes very large and dorsally touching or almost touching 

 the posterior ocelli, but their inner orbits diverging strongly ventrad. 

 Antennae (cf. Text-figs. 276, 278-280) very short : either with two anelli and 

 three funicular segments ; or three anelli and two funicular segments ; or 

 four anelli but only one funicular segment. Small species, at most 2 mm. in 

 length. (Some Pirenini) . . . MISCOGASTERINAE (part) (p. 95) 



Either females ; or males with eyes smaller and not nearly touching the 

 posterior ocelli dorsally, and the other characters not all present simul- 

 taneously. Males with inner orbits diverging strongly have longer antennae, 

 with either one anellus and seven funicular segments ; or no anelli but 

 eight funicular segments ......... 15 



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 with seven or eight 

 funicular segments ; with only one anellus, or without true anelli ; clava 

 sometimes solid, sometimes two- or three-segmented. Labrum often 

 visible even when the mandibles are closed. Head and thorax often with 

 numerous and conspicuous piliferous punctures. Postspiracular sclerite 

 large and broad, often more or less hairy ...... 49 



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

 rarely with more than six funicular segments, if with seven, some Chryso- 

 lampinae, some Asaphinae, Skeloceras (Miscogasterinae), some q* Tory- 

 midae, then the inner orbits of the eyes are nearly parallel ; at least one 

 anellus present, often two, occasionally three or four ; clava most often 

 three-segmented, occasionally two-segmented. Labrum very rarely visible. 

 Head and thorax usually with sparser or inconspicuous piliferous punctures. 

 Postspiracular sclerite large or small, nearly always bare . . . . 16 



Antennae 13-segmented ; most often with two anelli and six (occasionally 



seven) funicular segments, or three anelli and five funicular segments ; 



occasionally with only one anellus, but then with seven funicular segments. 



Petiolar foramen of propodeum most often bounded by a more or less ere- 



