710 M. W. R. de V. GRAHAM 



7 (6) Median area of propodeum 1-35-1 -5 times as broad as long. Antennae with 



combined length of pedicellus and flagellum distinctly less than breadth of 

 head ; first funicular segment distinctly shorter than the pedicellus, 

 quadrate to slightly transverse, segments 2-4 usually a little transverse ; 

 scape barely reaching the lower edge of the median ocellus. Small species, 

 length 1-6-2 mm. ...... nanus (Walker) (p. 721) 



- Median area of propodeum at most 1-25 times as broad as its median length. 



Antennae with combined length of pedicellus and flagellum slightly less 

 than, or as great as, the breadth of the head ; funicular segments 1-3 

 (-4) quadrate, or 1-3 even slightly longer than broad ; scape sometimes 

 reaching level of vertex. Species sometimes relatively larger ... 8 



8 (7) Fore wing with basal cell, not counting the hairs on the basal vein, bare, or 



with at most 1-2 hairs distally. Antennae with scape not quite reaching 

 the level of the vertex ; combined length of pedicellus and flagellum 

 usually not quite equal to breadth of head. Nucha occupying somewhat less 

 than half the median length of the propodeum . posticus (Walker) (p. 718) 



and statutus (Forster) (p. 719) 



- Fore wing with basal cell with 5-13 hairs scattered over its distal third. 



Antennae with scape reaching to level of vertex or even slightly above it ; 

 combined length of pedicellus and flagellum equal to, or even a little 

 greater than, the breadth of the head. Nucha occupying half the median 

 length of the propodeum ..... coryphe (Walker) (p. 717) 



9 (4) Thorax longer, 1-65-1-7 times as long as broad. Gaster 1-5-1-8 times as 



long as broad ; hind margin of basal tergite distinctly curved backwards. 

 Antennae with first funicular segment only about two thirds the length of 

 the pedicellus, quadrate or hardly longer than broad 



rugosus Delucchi & Graham (p. 724) 



- Thorax shorter, 1-35-1-45 times as long as broad. Gaster 1-85-2-1 times as 



long as broad ; hind margin of basal tergite weakly curved. First funicular 

 segment varying from slightly shorter, to slightly longer, than the pedicellus ; 

 usually longer than broad . . . . . . . . . 10 



10 (9) Median area of propodeum 1-6—1-85 times as broad as long. Pronotal 



collar (medially) from one ninth to one seventh as long as the mesoscutum. 

 Gaster 1-85-2 times as long as broad . . . conifer (Walker) (p. 722) 



- Median area of propodeum (Text-fig. 583) about 1-3 times as broad as long. 



Pronotal collar (medially) slightly more than one sixth as long as the 

 mesoscutum. Gaster about 2-2 times as long as broad 



flagellaris sp. n. (p. 723) 



1 1 (2) Fore wing with basal cell, on upper surface of wing, with at least a few hairs 



distally, as well as those on the basal vein, sometimes its distal third to 

 half pilose ; surface beyond the speculum relatively densely pilose ; 

 marginal vein at most 1 -5 times as long as the stigmal vein ... 28 



- Fore wing with basal cell bare, at most the basal vein pilose ; surface beyond 



the speculum usually not densely pilose ; marginal vein often more than 1 -5 



times as long as the stigmal vein .... . ... 12 



12 (11) Fore wing with basal vein at least partly pilose, most often throughout . 13 



- Fore wing with basal vein entirely bare . . . . . . . 19 



13 (12) Antennae with flagellum slender, proximally not or hardly stouter than the 



pedicellus, subclavate (Text-figs. 591, 593) . . . . . . 14 



Antennae with flagellum stout, even proximally distinctly stouter than the 



pedicellus, fusiform (Text-figs. 589, 590) ...... 19 



14 (13) Fore wing with marginal vein only 1-3-1-6 times as long as the stigmal vein ; 



basal vein, except in lonchaeae, pilose throughout. Thorax squat, about 



