382 M. W. R. de V. GRAHAM 



almost vertically to the neck, which is very short and hardly visible from 

 above. Postspiracular sclerite most often visible only as a small plate in 

 front of the tegula (Text-fig. 318), rarely broad or descending far ventrad. 

 Hind tibiae usually with two apical spurs (but one of these often weak and 

 hard to see). Body usually bronze, bluish black, or dark greenish, rarely 

 more brightly coloured. 



Species more frequent in xerotherm habitats, especially in Central and 

 Southern Europe ; not yet found in Britain ..... 196 



- Pronotal collar usually distinctly less wide than the mesoscutum, if only 



slightly so then the hairs of the head and thorax (excluding propodeum) 

 are inconspicuous and not whitish, or the pronotum descends less abruptly 

 in front of the collar. Postspiracular sclerite most often broader or 

 descending far ventrad. Hind tibiae with one apical spur. Body often 

 brightly metallic (green or blue). 



Almost all the genera of this section occur in North-western Europe, in 

 varied habitats, some represented by numerous species . . . .178 



178 (177) Fore wings without a speculum, hairy almost all over. Thorax much 



flattened dorso-ventrally, scutellum almost flat ; mesoscutum, scutellum 

 and propodeum all lying in nearly the same plane. Eyes rather con- 

 spicuously hairy. Occiput deeply concave, forming a fairly sharp edge 

 where it joins the vertex, and sometimes slightly margined at this point 



RAKOSINA Boucek (p. 781) 



- Fore wing with a speculum ; basal cell most often mainly bare, sometimes with 



its distal half more or less hairy. Thorax usually not flattened . . 179 



179 (178) Occiput finely margined medially. Propodeum with a reticulate nucha . 180 



Occiput not margined. Propodeal nucha sometimes represented only by a 



narrow transverse strip or ridge . . . . . . . .181 



180 (179) Face receding strongly so as to form an angle of about no° with the frons. 



Mesoscutum and scutellum with delicate, for the most part engraved, 

 reticulation . . . . cf. NASONIA Ashmead (p. 779) 



Face receding less strongly. Mesoscutum and scutellum with stronger reticu- 

 lation which is slightly raised above the general surface 



EUPTEROMALUS (part) (p. 737) 



181 (179) Propodeum with a conspicuous tuft of white hairs between the callus and the 



plica, on each side ; dorsal surface of hind coxae with some hairs ; prono- 

 tal collar finely though sharply margined. Antennae and body, Text-figs. 

 580,582 . . . . . ATRICHOMALUS Graham (p. 737) 



- Propodeum, between the callus and the plica, with at most a few hairs which 



do not form a conspicuous tuft [the callus itself is always more or less 

 hairy] ; dorsal surface of hind coxae without hairs ; pronotal collar some- 

 times immarginate . . . . . . . . . .182 



182 (181) Antennae (Text-figs. 431, 432) with clava ventrally with a line of micro- 



pilosity extending nearly to its base, the sutures of the clava strongly 

 oblique. Gena with a fairly large hollow above the base of the mandible. 

 Propodeum (Text-fig. 433) medially strongly produced beyond bases of 

 hind coxae, with a large reticulate nucha, often also traces of a costula. 

 Stigma of fore wing usually (Text-fig. 434) moderate-sized 



SYNEDRUS Graham (p. 583) 



- Antennal clava with a smaller area of micropilosity which is confined to its 



third segment and extends at most half way to the base of the clava ; 

 sutures of the latter not or hardly oblique. The other characters not all 

 present in combination . . . . . . . . .183 



