128 M. W. R. de V. GRAHAM 



pedicellus. Head in dorsal view (Text-fig. 95) hardly twice as broad as 

 long, with temples not strongly convergent ; POL slightly less than OOL 



mutica Thomson (p. 130) 



- Antenna (Text-figs. 105, 106) with clava with its sutures not or hardly oblique, 



with a smaller area of micropilosity which extends at most slightly more 

 than one third the length of the clava ; first funicular segment not, or only 

 slightly, longer than the pedicellus ....... 5 



5 (4) Head in dorsal view (Text-fig. 97) slightly less than twice as broad as long ; 



POL slightly less than OOL. Antennal flagellum (Text-fig. 106) with rather 

 strongly outstanding bristles ; third funicular segment quadrate to slightly 

 transverse, segments four to six slightly transverse truncata Thomson (p. 130) 

 Head in dorsal view (Text-figs. 98, 99) twice or slightly more than twice as 

 broad as long ; POL about equal to, or slightly greater than, OOL. An- 

 tennal flagellum (Text-fig. 105) with rather less outstanding bristles ; third 

 funicular segment sometimes longer than broad, segments four to six 

 sometimes not transverse ......... 6 



6 (5) Antenna with combined length of pedicellus and flagellum slightly less than 



breadth of head. Body dark green or blue-green. Antennal scape hardly 

 reaching the median ocellus ..... intersita sp. n. (p. 131) 



- Antenna (Text-fig. 105) with combined length of pedicellus and flagellum 



equal to or slightly greater than breadth of head. Either the body is a 

 brighter green or blue ; or else the antennal scape reaches to or above the 

 median ocellus ........... 7 



7 (6) Antenna with pedicellus, in dorsal view, nearly twice as long as broad ; proxi- 



mal segments of funicle slightly constricted basally. Pronotal collar with 

 a transverse ridge anteriorly, but with very weak teeth. Antennal scape, 

 and legs except coxae, entirely or nearly entirely reddish . . sp. indet. 



- Antenna with pedicellus relatively shorter ; segments of funicle not con- 



stricted basally. Pronotal collar with more distinct teeth. Antennal 

 scape mainly to entirely black with a metallic tinge ; femora infuscate at 

 least basally ........... 8 



8 (7) Petiole of gaster 2 to 2-3 times as long as broad. Head, thorax, and gaster 



mainly bright green to blue. Median carina of propodeum indicated at 



least by a blunt ridge ..... aculeata Walker (p. 131) 



- Petiole of gaster 2-8 to 3-3 times as long as broad. Body dark green or dark 



blue. Median carina of propodeum absent, or indicated at base only. 

 Head, text-fig. 99 ; antenna, text-fig. 105 . . nigricornis (Nees) (p. 132) 



9 (1) Fore wing with distal half to two-thirds of basal cell with scattered hairs 



except just above the cubital vein. Petiole of gaster hardly 1-5 times as 

 long as broad. Mesoscutum nearly or quite twice as broad as long. Gaster 

 2 -3 to 2 -5 times as long as broad, about as long as head plus thorax. Pronotal 

 collar almost rounded off anteriorly . . brevicornis (Walker) (p. 135) 



- Fore wing with basal cell bare, at most the basal vein pilose. Petiole of 



gaster at least nearly twice as long as broad. Mesoscutum often relatively 

 less transverse. Gaster sometimes relatively shorter. Pronotal collar at 

 least very slightly margined . . . . . . . .10 



10 (9) Antenna (Text-fig. 108) with flagellum slender proximally, not stouter than 

 the pedicellus but broadening strongly from the third or fourth funicular 

 segment onwards ; clava fully twice as broad as first funicular segment, in 

 profile appearing strongly asymmetrical, only about 1 -5 times as long as 

 broad ......... obliqua sp. n. (p. 135) 



Antennal flagellum less strongly clavate, becoming only gradually thicker from 

 the first funicular segment to the clava ; the latter much less than twice as 



