PTEROMALIDAE OF N.W. EUROPE 685 



long as its maximum breadth ; first segment of mid tarsus expanded and flattened, 

 only about 2-5 times as long as broad, second segment slightly expanded. Mar- 

 ginal vein of fore wing 1-5 to 1-7 times as long as the stigmal vein 



inornatus (Walker) (p. 685) 

 - Mid tibia neither expanded nor flattened, 8 to 8-5 times as long as its maximum 

 breadth ; mid tarsus neither expanded nor flattened. Marginal vein of fore wing 

 1-25 to 1-3 times as long as the stigmal vein . . . leptomerus sp. n. (p. 685) 



Pegopus inornatus (Walker) 



Eutelus inornatus Walker, 1834 : 363, $. 



Pteromalus sobrius Walker, 1836 : 484, ?. 



Prosopon montanum Walker, 1837 : 356, o*- 



Prosopon montanum (Walker) Haliday, 1841-1842 : pi. D., fig. 4, <J. 



Pteromalus Pyttalus Walker, 1844a : 340, $. 



Pteromalus Aollius Walker, 1845 : 262, o\ syn. n. 



Prosopon montanum Walker, 1850 : 132-133, $. 



Arthrolytus rugifrons Thomson, 1878 : 160, $. 



Pegopus inornatus (Walker) Graham, 19566 : 254. 



For most of the above synonymy, and designation of lectotypes for all the above 

 species except the two mentioned below, see Graham (19566 : 254). 



Pteromalus aollius Walker. Syntypes, 2 0* ; LECTOTYPE, the first specimen, 

 bearing a Waterhouse label. 



Arthrolytus rugifrons Thomson. Syntypes, 8 $ ; LECTOTYPE, one labelled 

 " Die " [Dalecarlia] and " Bhn " [Boheman]. The species was synonymized with 

 inornatus by Graham (19566 : 254). 



Britain, Ireland, Sweden, Germany, Switzerland, Czechoslovakia. In 

 Britain it occurs only on moorland, often at relatively high altitudes. I have taken 

 it up to 2,500 feet. 



Biology. Unknown. Imagines July-September. 



Pegopus leptomerus sp. n. 



(Text-figs. 556-558) 



$. Body bronze-black. Mandibles reddish, darker at the base. Antennae black ; scape 

 and pedicellus with a weak bronze tinge. Coxae concolorous with the body ; legs otherwise 

 blackish with the knees reddish. Wings subhyaline ; venation brown, parastigma and stigma 

 darker. Length 1-7 to i-8 mm. 



Head in front view (Text-fig. 556) about 1-35 times as broad as high. Eyes 1-25 to 1-3 times 

 as long as broad, separated by virtually 1-5 times their own length. Malar space slightly more 

 than half the length of an eye. Head somewhat shiny, its reticulate sculpture rather less strong 

 than that of inornatus (Walker). Antennae inserted relatively low, the lower edge of their 

 toruli being about level with the ventral edge of the eyes ; scape equal in length to an eye, 

 reaching distinctly above the level of the vertex ; flagellum more slender proximally than in 

 inornatus, the first funicular segment barely as stout as the pedicellus when the latter is seen 

 in dorsal view ; distal segments of funicle less transverse than in inornatus, funicular segments 

 one to three or one to four are quadrate or hardly transverse, five and six are slightly transverse. 



Pronotal collar sharply margined. Mesoscutum, axillae, and scutellum rather more shiny than 



