644 M. W. R. de V. GRAHAM 



and thorax sometimes tinged with bronze or coppery. Marginal vein 

 sometimes relatively shorter. . . . . . . . .24 



24 (23) Malar space only about one third the length of an eye, the latter 1-5 to i-6 



times as long as broad. Flagellum, not counting pedicellus, very short, 

 its length hardly greater than distance between eyes. Head and thorax 

 bronze-green to bronze or coppery . . citrinus (Ratzeburg) (p. 673) 



- Malar space at least somewhat more than one third the length of an eye, the 



latter 1 -25 to 1 -35 times as long as broad. Either the length of the flagellum 

 is somewhat greater than the distance between the eyes ; or the head and 

 thorax are golden green to blue . . . . . . . .25 



25 (24) Head and thorax olive-green to bronze, the mesoscutum and scutellum usually 



tinged with bronze or coppery, sometimes other parts of these colours. 

 Pale parts of legs tending to be testaceous or brownish testaceous. Malar 

 space nearly or quite half the length of an eye ...... 26 



Head and thorax golden green to green or blue. Pale parts of legs most often 

 yellow or yellowish testaceous. Malar space sometimes relatively shorter, 

 or longer, than in the alternate . . . . . . . .41 



26 (25) Thorax relatively squat (1-5 to 1-55 times as long as broad) ; median area of 



propodeum 1-75 to 2 times as broad as long. Scutellum, including frenum, 

 with extremely fine reticulation. Antennal funicle proximally slightly 

 stouter than the pedicellus, and thickening only slightly distad. Meso- 

 scutum anteriorly with at least some trace of shallow scattered piliferous 

 punctures ....... typographi (Ruschka) (p. 673) 



- Thorax relatively longer (1-7 to i-8 times as long as broad) ; median area of 



propodeum about 1 -6 times as broad as long. Scutellum with rather less 

 fine reticulation. Antennal funicle more slender proximally, the first seg- 

 ment hardly stouter than the pedicellus, but thickening distinctly distad. 

 Mesoscutum without piliferous punctures . . . sp. indet. A (p. 673) 



27 (16) Head in dorsal view with temples nearly three quarters as long as eyes. Malar 



space more than half the length of an eye. 



Anterior margin of clypeus deeply emarginate medially. Gaster ovate. 



apicalis (Thomson) (p. 677) 

 Head in dorsal view with temples appearing one quarter to one third as long as 



eyes. Malar space often relatively shorter than in above ... 28 



28 (27) Pronotal collar very long, medially from nearly one fifth, to fully one quarter, 



as long as the mesoscutum. Anterior margin of clypeus (Text-fig. 526) 

 deeply emarginate medially, with a distinct impression above the emargination. 

 Gaster ovate, about as long as thorax, less than twice as long as broad 



amaenus (Walker) (p. 676) 



- Pronotal collar rarely approaching the above in length ; if so then either the 



anterior margin of the clypeus is shallowly emarginate, or the gaster is 

 relatively longer . . . . . . . . . .31 



29 (15) Tip of hypopygium situated at about three quarters the length of the gaster. 



Antennae with scape testaceous ; pedicellus and flagellum more or less 

 testaceous at least beneath .... xanthocerus (Thomson) (p. 675) 



- Tip of hypopygium situated at about two thirds the length of the gaster. 



Antennae with scape brownish to fuscous ; flagellum brown to blackish 



fuscipes (Walker) (p. 675) 



30 (10) Antenna with third flagellar segment not or only slightly shorter than the 



fourth, provided with sensilla. Head in dorsal view 2-2 to 2-4 times as 

 broad as long ....... tibialis (Westwood) (p. 676) 



- Antennae with third flagellar segment at most half as long as the fourth and 



without sensilla. Head in dorsal view 2 to 2-25 times as broad as long . 31 



