1 88 M. W. R. de V. GRAHAM 



25 (24) Gastral petiole i-i to 1-2 times as broad as long, slightly more than half as 



long as the propodeum ..... diffine (Walker) (p. 200) 



Gastral petiole 1 -4 to 1 -5 times as broad as long, hardly half as long as the 



propodeum ....... alpestre (Ruschka) (p. 200) 



26 (20) Eye 1-25 to 1-27 times as long as broad. Antennal scape reaching to about 



middle of median ocellus or slightly above this level. Body bronze-green 



sp. indet. 

 Eye 1 -3 to 1-37 times as long as broad. Antennal scape not or hardly reaching 



the lower edge of the median ocellus. Body blue-green or blue ... 27 



27 (26) Antenna with combined length of pedicellus and flagellum 1 -i to 1-15 times 



breadth of head. Smaller, 2-1 to 2*4 mm. . . euroto (Walker) (p. 204) 



- Antenna with combined length of pedicellus and flagellum 1-25 to 1-35 



times breadth of head. Larger, 2-4 to 3-2 mm. . breve (Walker) (p. 203) 



28 (3) Postspiracular sclerite with a distinct oblique carina which marks off a 



triangular upper area. Hind coxae with some hairs on their dorsal surface. 

 Stigmal vein (Text-fig. 154) forming a relatively less acute angle with the 

 postmarginal. Antennal clava with micropilosity on third segment only. 

 Median area of propodeum (except sometimes on either side of the median 

 carina) rather strongly reticulate . . . convexum (Walker) (p. 206) 



- Postspiracular sclerite without an oblique carina except sometimes a trace of 



one in laetum, but in this species the hind coxa is bare dorsally, the stigmal 

 vein forms a more acute angle with the postmarginal, and the antennal 

 clava has micropilosity on the second and third segments (Species-group of 

 laetum Walker = Seladerma s. str.) ....... 29 



29 (28) Stigmal vein forming a relatively less acute angle with the postmarginal vein. 



Hind coxae usually with some hairs on the dorsal surface. Antennal clava 

 with micropilosity on its third segment only. Gaster rather less than twice 

 as long as broad ...... breve (Walker) (p. 203) 



Stigmal vein (Text-fig. 155) strongly curved and forming a more acute angle 

 with the postmarginal vein. Hind coxae bare dorsally. Antennal clava 

 sometimes with micropilosity on its second and third segments. Gaster 

 (except in gelanor) twice as long as broad ...... 30 



30 (29) Gaster shorter than thorax, 1-5 to i-6 times as long as broad ; basal tergite 



occupying about two fifths of the total length ; mid femora, not counting 

 the trochantellus, more slender than fore femora, about five times as long 

 as broad, their ventral edge nearly straight ; clava with micropilosity on 

 third segment only ...... gelanor (Walker) (p. 205) 



- Gaster as long as or slightly longer than thorax, 2 to 2-3 times as long as 



broad ; basal tergite occupying about one third of the total length ; mid 

 femora stout like the fore femora, only about four times as long as broad, 

 their ventral edge curved . . . . . . . . .31 



31 (30) Antennal clava with micropilosity on its second and third segments ; POL 



1-3 to 1-5 OOL ; all femora usually infuscate at least proximally, rarely 

 the hind femora wholly testaceous ; antennal scape at least infuscate 

 dorsally at apex, sometimes mainly so ; head and thorax most often green 

 or bronze-green, occasionally blue . . . laetum (Walker) (p. 204) 



- Antennal clava with micropilosity on its third segment only ; POL hardly 



greater than OOL ; all femora bright testaceous, scape at least mainly so ; 



head and thorax tending towards blue-green or blue bicolor Walker (p. 206) 



Key to some Males 



1 Spur of mid tibia weak, its length hardly equal to the maximum breadth of 



the tibia. Antennal flagellum with very short subdecumbent pubescence ; 



