634 M. W. R. de V. GRAHAM 



Key to European Species 



(Females) 



i Antennae (Text-fig. 517) inserted lower on head, the lower edge of their toruli 



level with ventral edge of eyes. Fore wing with marginal vein twice, or 

 slightly more than twice, as long as the stigmal vein ; stigma small, sepa- 

 rated by about three times its height from the costal edge of the wing ; basal 

 vein with scattered hairs. Gaster 2 to 2-5 times as long as broad, about 

 as long as head plus thorax. Median area of propodeum (Text-fig. 522) shiny, 

 irregularly reticulate with some wrinkles. Pronotal collar with its anterior 

 carina only moderately raised. (EUMACEPOLUS s. str.) 



grahami v. Rosen (p. 636) 



- Antennae inserted higher, the lower edge of their toruli slightly above the 



level of the ventral edge of the eyes. Fore wing (Text-fig. 519) with 

 marginal vein 1 -4 to 1 -6 times as long as the stigmal vein ; stigma larger, 

 separated by at least slightly less than three times its height from the 

 costal edge of the wing ; basal vein pilose throughout, basal cell also with 

 a few scattered hairs distally. Gaster 1-3 to i-6 times as long as broad, 

 only slightly longer than the thorax. Median area of propodeum duller, 

 uniformly reticulate. Pronotal collar with a very sharp and strongly 

 raised (sometimes almost reflexed) anterior carina. (OXYCEPOLUS 

 sgen. n.) ........... . 2 



2 (1) Antenna with scape as long as an eye, reaching level with top of median 

 ocellus; pedicellus (dorsal view) 2-5 to 2-8 times as long as broad ; anelli 

 quadrate ; flagellum only very weakly clavate with proximal funicular 

 segments obviously longer than broad, and at most the sixth slightly 

 transverse. Propodeum medially slightly more than half as long as the 

 scutellum ; median area only about 1-25 times as broad as long. Femora 

 and tibiae yellow, or at most the femora dark at the base. Large species, 

 length up to 4 mm. Fore wing, Text-fig. 519 . pulcher Graham (p. 636) 



- Antenna with scape shorter than an eye, reaching only level with lower edge 



of median ocellus ; pedicellus 2 to 2-2 times as long as broad ; anelli 

 slightly transverse ; flagellum distinctly clavate ; first funicular segment 

 quadrate to slightly longer than broad, fifth and sixth distinctly transverse, 

 sometimes the fourth slightly so. Propodeum medially only about two 

 fifths as long as the scutellum ; median area 1-7 to i-8 times as broad as 

 long. Femora mainly dark ; tibiae more or less infuscate medially. Smal- 

 ler species, length 1-9 to 2-5 mm. . . . obscurior Graham (p. 636) 



(Males) 



1 Lower edge of antennal toruli about level with ventral edge of eyes ; scape 



(Text-fig. 518) slightly longer than an eye. Fore wing with marginal vein 

 1-7 to i-8 times as long as the stigmal vein ; stigma small, separated by 

 fully three times its height from the costal edge of the wing ; basal cell bare 

 or nearly so, basal vein with a single row of hairs, often only a few. Median 

 area of propodeum shiny, weakly and irregularly reticulate. Gaster with a 

 yellowish spot or transverse band. (EUMACEPOLUS s. str.) 



grahami v. Rosen (p. 636) 

 Lower edge of antennal toruli slightly above level of ventral edge of eyes ; 

 scape (Text-figs. 520, 521) slightly shorter than an eye. Fore wing with 

 marginal vein 1-25 to 1-4 times as long as the stigmal vein ; stigma rather 

 larger than in alternate ; basal vein thickly pilose, basal cell with some 

 scattered hairs next to the basal vein. Median area of propodeum duller, 



