54 6 M. W. R. de V. GRAHAM 



segment i-i to i-6 times as long as broad, sixth quadrate to slightly transverse, sometimes also 

 the fifth and even the fourth are quadrate ; clava usually collapsing slightly and then appearing 

 slightly broader than the funicle, i -8 to 2 -3 times as long as broad, its length slightly greater than 

 the combined length of the two preceding funicular segments ; sensilla numerous, usually in 

 two, sometimes irregular, rows on each funicular segment, sometimes only one row on the distal 

 segments or, in very small specimens, on all the segments ; hairs of flagellum mostly sub- 

 adpressed. 



Thorax about 1-4 times as long as broad. Pronotal collar somewhat less wide than the 

 mesoscutum, appearing hardly longer at the sides than in the middle, subhorizontal, its front 

 edge abrupt or weakly irregularly margined in the middle ; one seventh to one sixth as long 

 as the mesoscutum, somewhat more coarsely reticulate than the front part of the latter. 

 Mesoscutum 1-5 to 1 -65 times as broad as long, rather dull, very finely reticulate, slightly more 

 coarsely in the middle posteriorly. Scutellum about as broad as long, very finely reticulate, 

 slightly more coarsely on the frenum. Inner angles of axillae with rather coarser reticulation 

 than that of the scutellum. Propodeum about one third as long as the scutellum or slightly more, 

 sloping at an angle of about 45 to the plane of the mesoscutum and scutellum ; median area 

 2 to 2-6 times as broad as long, its panels somewhat shiny, irregularly sculptured, partly finely 

 reticulate, with some carinulae or wrinkles, with some longitudinal carinulae at the base ; 

 median carina complete and sharp, slightly raised basally though not dentiform ; there is a 

 large oval fovea on each side of the median area, touching the base of the propodeum ; costula 

 more or less indicated, usually represented by a slightly raised reticulate ridge, but rarely at 

 all sharp ; nucha about one third the median length of the propodeum, separated from the 

 median area by a deep and longitudinally-costate furrow, the nucha with very fine reticulation 

 whose areoles are broader than long ; plicae anteriorly subparallel and forming convex 

 elevations just outside the basal foveae, posteriorly sharp and extending along the sides of the 

 nucha to its hind edge, the part on the sides of the nucha converging strongly towards the med- 

 ian line ; callus lightly and finely reticulate ; spiracles large, sublinear, touching or almost 

 touching the metanotum ; spiracular sulci distinctly impressed, punctate or with some trans- 

 verse costulae. Postspiracular sclerite narrow, very weakly sculptured and shiny, with an 

 impression along its front border. Mesepisternum finely reticulate, with a mainly to wholly 

 smooth area below the base of the hind wing ; mesepimeron finely reticulate ; metapleuron 

 rather more finely reticulate than the mesepimeron. Legs rather short ; femora relatively 

 stout. Fore wing with upper surface of costal cell bare, lower surface with a row of widely- 

 spaced hairs (Text-fig. 403) which is interrupted in or before the middle, often very widely ; 

 basal cell bare, basal vein bare or virtually so ; speculum open below, on upper surface of wing 

 extending below the marginal vein for more than half the length of the latter, or even as far as 

 the stigmal vein ; wing beyond speculum with its pilosity not dense, the area between the post- 

 marginal and stigmal veins partly bare ; marginal vein 1-35 to i-6 times as long as the stigmal 

 vein ; postmarginal vein usually a little shorter than the marginal ; stigmal vein slightly 

 curved, forming an angle of 40 to 45° with the postmarginal ; stigma small, obliquely suboval ; 

 apical margin of wing ciliate in fresh specimens, but tending to lose the cilia later so that the 

 margin becomes at least partly bare. 



Gaster lanceolate, i-i to 1-3 times as long as head plus thorax, slightly to distinctly narrower 

 than the thorax, acute and sometimes slightly acuminate apically, 2-2 to 3 times as long as 

 broad ; hind margin of basal tergite entire or very weakly emarginate medially ; last tergite 

 from as long as, to slightly longer than, its basal breadth, its front third to half bare ; hypopy- 

 gium extending about half way along the gaster ; ovipositor sheaths projecting slightly so that 

 their tips are visible in dorsal view. 



o*. Antennal scape often wholly dark, rarely with more than its proximal half testaceous in 

 British specimens, reaching about to level of middle of median ocellus. Gaster immaculate. 

 In structure much like the female, but with the propodeum somewhat longer, its median area 

 less transverse ; antennae and gaster different. Antennae with combined length of pedicellus 

 and flagellum slightly greater than breadth of head ; flagellum not slender, distinctly stouter 



