186 M. W. R. de V. GRAHAM 



Gaster at most as long as head plus thorax, often less than twice as long as 



broad ............ 15 



14 (13) Legs (not counting coxae and last segment of tarsi) testaceous. Head in dorsal 



view 2-1 to 2-15 times as broad as long, with temples converging strongly. 

 Antennal scape reaching the median ocellus ; flagellum slender, proximally 

 not stouter than the pedicellus ; funicular segments on the average longer, 

 the sixth quadrate or slightly longer than broad. Fore wing with marginal 

 vein 1 -6 to 1 -85 times as long as the stigmal vein, the latter forming an angle 

 of 35° to 40 with the postmarginal . . . saurus (Walker) (p. 197) 



- All femora at least broadly infuscate at their bases, often mainly black ; 



tibiae sometimes more or less infuscate. Head in dorsal view at most 2-05 

 times as broad as long, with temples converging less strongly (Text-fig. 

 149). Antennal scape not reaching the median ocellus ; flagellum stouter, 

 proximally at least slightly stouter than the pedicellus in profile ; funicular 

 segments on the average shorter, the sixth quadrate or slightly transverse. 

 Fore wing with marginal vein 1 -47 to 1 -65 times as long as the stigmal vein, 

 the latter forming an angle of about 45 with the postmarginal . . . 16 



15 (13) Head in dorsal view (Text-fig. 149) only i-8 to 2-05 times as broad as long ; 



temples converging less strongly, more rounded. Gaster 2 to 3-3 times as 

 long as broad, at least somewhat longer than the thorax. Propodeum 

 medially hardly produced beyond the bases of the hind coxae. Antennal 

 scape not reaching the median ocellus. Head, thorax, and gaster mainly, 

 blue-green or green .......... 16 



Head in dorsal view (Text-figs. 150, 151) 2-2 to 2-4 times as broad as long ; 

 temples converging more strongly. Gaster often relatively shorter. 

 Propodeum medially usually slightly produced backwards beyond the 

 bases of the hind coxae. Antennal scape often reaching the median 

 ocellus. Head, thorax, and gaster sometimes bronze-green or bronze . 18 



16 (15) Propodeum, medially, slightly more than half as long as the scutellum ; head 



in dorsal view only 1 -85 times as broad as its maximum length. Gaster not 

 quite as long as head plus thorax ....... sp. indet. 



- Propodeum, medially, at most half as long as the scutellum ; head in dorsal 



view 2 to 2-05 times as broad as its maximum length . . . . 17 



17 (16) Gaster not quite as long as head plus thorax, 2 to 2-3 times as long as broad ; 



propodeum, medially, nearly or just half as long as the scutellum 



caledonicum sp. n. (p. 195) 



- Gaster distinctly longer than head plus thorax, 2-4 to 3-3 times as long as 



broad ; propodeum, medially, somewhat less than half as long as the 

 scutellum ....... antennatum (Walker) (p. 194) 



and sabbas (Walker) (p. 194) 



18 (15) Gaster as long as head plus thorax, nearly 2-5 times as long as broad ; 



flagellum stout, in profile distinctly stouter than the pedicellus ; sixth 

 segment of funicle slightly transverse ...... sp. indet. 



- Gaster at least slightly shorter than head plus thorax ; at most twice as long as 



broad, but nearly always less than twice. If the gaster is twice as long as 

 broad, then the antennal flagellum is slender, hardly stouter than the 

 pedicellus ............ 19 



19 (18) Antennal scape entirely testaceous, or with at most its distal third dark. 



Malar space almost half the length of an eye (14 : 30). Gaster about twice 

 as long as broad, slightly longer than the thorax ; basal tergite occupying 

 only about one third the total length. 



Antennal funicle slender, proximally hardly stouter than the pedicellus ; 

 first funicular segment about twice as long as broad, sixth slightly longer 



