378 M. W. R. de V. GRAHAM 



scutellum. Marginal vein of fore wing i -8 to 2 times a» long as the stigmal 



vein CHLOROCYTUS Graham (p. 611) 



- Antennal clava in profile appearing symmetrical or virtually so . . . 148 



148 (147) Plicae complete and extending to base of propodeum ; their anterior half 



represented at least by a distinctly impressed longitudinal groove, though 



most often the outer edge of this groove is raised to form a sharp fold . 149 



- Plicae incomplete ; either present only at hind margin of propodeum, or else 



more or less effaced in the middle or in front . . . . .152 



149 (148) Propodeum (Text-fig. 314) : the median area with a very distinct costula, 



its panels shiny and with irregular wrinkles. Basal tergite of gaster with 

 few hairs at the sides. Pronotal collar finely, sharply margined. Spira- 

 cular sulci of propodeum distinctly impressed 



STAUROTH YREUS Graham (p. 699) 



- Propodeum without a costula, or with at most a vague trace of one ; panels 



of median area most often relatively uniformly reticulate and relatively 



dull, if shiny then without conspicuous irregular wrinkles . . .150 



150 (149) Propodeum with panels of median area very shiny, smooth or with only 



traces of weak sculpture ; basal tergite of gaster with a large patch of 20 or 

 so hairs on each side ; pronotal collar finely though sharply margined 

 throughout ; spiracular sulci of propodeum distinctly impressed 



TRICHOMALUS Thomson (p. 707) 



- Panels of median area of propodeum nearly always strongly reticulate, if very 



weakly so then the basal tergite of the gaster has only a few hairs at the 

 sides, and the spiracular sulci of the propodeum are very shallow. Prono- 

 tal collar sometimes weakly margined . . . . . . .151 



151 (150) Spiracular sulci of propodeum distinctly impressed, more or less punctate or 



with some transverse costulae. Postspiracular sclerite (Text-fig. 336) 

 usually weakly and irregularly reticulate, sometimes partly smooth. 

 Marginal vein of fore wing sometimes less than 1-7 times as long as the 



stigmal vein HABROCYTUS Thomson (p. 494) 



and PTEROMALUS Swederus (p. 488) 



- Spiracular sulci shallow, alutaceous to nearly smooth. Postspiracular 



sclerite (Text-fig. 335) nearly uniformly reticulate, relatively broad. 

 Marginal vein of fore wing 1-7 to 2-3 times as long as the stigmal vein 



CHLOROCYTUS Graham (p. 611) 



152 (148) Marginal vein of fore wing 1-7 to 2-3 times as long as the stigmal vein. 



Spiracular sulci of propodeum shallow, broad CHLOROCYTUS Graham (p. 611) 



- Marginal vein of fore wing about 1 -5 times as long as the stigmal vein. 



Spiracular sulci of propodeum distinctly impressed, narrow (conopidarum 

 Boucek) HABROCYTUS Thomson (p. 494) 



153 (144, 145) Mesepisternum wholly or almost wholly reticulate, the upper triangular 



area below the base of the hind wing being reticulate or at most smooth 

 posteriorly ; propodeal spiracles large, oval, close to the hind margin of the 

 metanotum MESOPOLOBUS Westwood (p. 638) 



- Mesepisternum having its upper triangular area smooth or mainly so ; pro- 



podeal spiracles smaller, often subcircular, sometimes separated by nearly 

 their own diameter from the metanotum . . . . . .154 



J 54 ( x 53) Gaster subcircular to ovate, 1-2 to 1-7 times as long as broad, not or only 

 slightly longer than the thorax ; distal part of basal cell of fore wing more 

 or less pilose ........... 155 



Gaster lanceolate, twice or (usually) more than twice as long as broad, at 

 least as long as head plus thorax ; basal cell of fore wing bare, a row of hairs 

 which is sometimes present on the basal vein is not counted . . .156 



