7 i6 M. W. R. de V. GRAHAM 



1 8 (16) Head in dorsal view with temples nearly half as long as eyes. Antennal 



fiagellum hardly stouter than the pedicellus, when the latter is seen in dorsal 

 view, brownish. Hind coxae dorsally with very few hairs, or bare. 

 Antennal scape, and legs, tending towards testaceous. Gaster with at 

 most a faint pale spot ...... inscitus (Walker) (p. 728) 



Head in dorsal view with temples about one third as long as eyes. Antennal 

 flagellum slightly stouter than the pedicellus in dorsal view, yellowish 

 beneath, and often testaceous above. Hind coxae distinctly hairy dorsally. 

 Antennal scape, and legs, flavous. Gaster usually with a distinct yellowish 

 spot ......... helvipes (Walker) (p. 731) 



19 (2) Antennae with flagellum with virtually decumbent hairs ; sensilla con- 



spicuous, very numerous, arranged in 3 rows on each of the funicular 

 segments, except the distal ones. Propodeum with median area with a 

 costula, which is sometimes strong ; nucha fairly strongly reticulate 



? flagellaris sp. n. (p. 723) 

 Antennae with flagellum with hairs standing out at an angle of 30°-45° ; 

 sensilla usually less conspicuous, sparser, arranged in 1 or 2 rows on each of 

 the funicular segments. Propodeum with costula often absent ; nucha 

 usually more weakly sculptured ........ 20 



20 (19) Propodeum with nucha with strong raised reticulation, relatively dull and 



large ............. 21 



Propodeum with nucha with weak reticulation, alutaceous sculpture, or 



transversely strigose, relatively shiny, often short . . . . . 22 



21 (20) Propodeum with panels of median area relatively strongly and nearly 



uniformly reticulate .......... 29 



- Propodeum with panels of median area usually weakly sculptured or nearly 



smooth, if more strongly then the sculpture is composed of oblique strigose- 

 reticulation ........... 22 



22 (21) Thorax in dorsal view only 1-5— 1-55 times as long as broad. Head 1-25-1-3 



times as broad as the mesoscutum. Antenna with first funicular segment 

 as long as or slightly longer than the pedicellus ; scape distinctly shorter 

 than an eye. Fore wing with marginal vein 1-55-1-6 times as long as the 

 stigmal vein ; stigma small ..... conifer (Walker) (p. 722) 

 Thorax in dorsal view 1 -7-1 -8 times as long as broad. Head usually rather less 

 broad relative to the mesoscutum. The antennal and fore wing characters 

 sometimes not agreeing with the above ....... 23 



23 (22) Antennae with first funicular segment slightly shorter than the second, and 



slightly shorter than the pedicellus ; flagellum subtestaceous ; scape as 

 long as an eye, distinctly expanded above its middle. Fore wing usually 

 with a brownish cloud around the stigma ; marginal vein about 1-5 times 

 as long as the stigmal vein. Head in dorsal view only 1-85-1-9 times as 

 broad as long ..... gracilicornis (Zetterstedt) (p. 725) 



- Antennae with first funicular segment as long as or slightly longer than the 



second, as long as or longer than the pedicellus ; flagellum brown to black ; 

 scape at least somewhat, sometimes much, shorter than an eye. Fore wing 

 immaculate ; marginal vein sometimes rather longer relative to the 

 stigmal vein. Head in dorsal view usually 2-2-15 times as broad as long 24 



24 (23) Fore wing with marginal vein only 1-3-1-45 times as long as the stigmal vein ; 



basal vein pilose or bare ; stigma moderate-sized and tending to be dark, 

 fuscous or brown .......... 25 



- Fore wing with marginal vein 1-55-1-9 times as long as the stigmal vein ; 



basal vein pilose ; stigma small or moderate-sized ..... 26 



25 (24) Dorsal surface of hind coxae hairy. Antennal scape reaching to about level of 



