648 M. W. R. de V. GRAHAM 



40 (39) Head and thorax greenish bronze to bronze ; all femora heavily infuscate, 



sometimes also the tibiae. Antennal flagellum rather slender ; funicular 

 segments quadrate, or at most the fourth and fifth slightly transverse 



sp. indet. A (p. 673) 



- Head and thorax golden green to green or blue ; femora and tibiae usually clear 



yellow, the femora sometimes infuscate but rarely the tibiae. Antennal 

 flagellum sometimes stouter, sometimes with the distal funicular segments 

 strongly transverse . . . . . . . . . .41 



41 (40) Eyes larger, separated by approximately their own length. Antennae with 



third flagellar segment quadrate or only slightly transverse, usually rather 

 more than half as long as the fourth segment. Species associated with 

 Cynipid galls on Quercus ......... 12 



- Eyes smaller, separated by 11 to 1-2 times their own length. Antennae with 



third flagellar segment nearly or quite twice as broad as long, usually 

 less than half as long as the fourth segment. Species associated with 

 Gramineae ........... 42 



42 (41) Tip of hypopygium, which is prominent, situated at about three quarters 



length of gaster, the latter not or only slightly longer than head plus thorax. 

 Median carina of propodeum sharp at base but tending to fork or become 

 indistinct in the middle .... agropyricola v. Rosen (p. 674) 



- Tip of hypopygium situated at most about half way along the gaster, the 



latter slightly to much longer than head plus thorax. Median carina of 

 propodeum usually sharp and distinct as far as the nucha .... 43 



43 (42) Gaster at least slightly less than twice as long as broad, not quite as long as 



head plus thorax .......... 44 



- Gaster at least twice as long as broad, at least as long as head plus thorax . 45 



44 (43) Median area of propodeum fairly strongly strigose-reticulate, half or slightly 



more than half as long as the scutellum . . . . sp. indet. B (p. 673) 



- Median area of propodeum shiny, with only weak traces of reticulation, or 



virtually smooth, one third or slightly more than one third as long as the 

 scutellum ............ 48 



45 (43) Antennae (Text-figs. 546, 548) with flagellum only moderately clavate ; first 



funicular segment quadrate or only very slightly transverse, usually as long 

 as the second, rarely very slightly shorter ; fifth funicular segment at most 

 i-6 times as broad as long ; clava at most as long as the three preceding 

 funicular segments together, often more than 1-7 times as long as broad . 46 



- Antennae (Text-figs. 544, 547) with flagellum strongly clavate ; first funicular 



segment usually more or less transverse (only occasionally quadrate), often 

 shorter than the second segment ; fifth funicular segment 1 -6 to 2 times as 

 broad as long ; clava most often as long as 3-5 to 4 of the preceding funicular 

 segments together, only 1-5 to 1-7 times as long as broad .... 48 



46 (45) Antennal scape virtually as long as an eye, reaching or virtually reaching the 



lower edge of the median ocellus. Fore wing with postmarginal vein more 

 than three quarters as long as the marginal vein. Malar space slightly 

 more than half the length of an eye . . . graminum (Hardh) (p. 663) 



- Antennal scape distinctly shorter than an eye, not reaching the median 



ocellus. Fore wing with postmarginal vein at most three quarters as long 



as the marginal vein. Malar space 0-42 to 0-5 the length of an eye . . 47 



47 (46) Antenna (Text-fig. 546) with pedicellus not quite as long as anelli plus first 



funicular segment. Gaster 2 to 2-8 times as long as broad. Malar space 

 0-42 to 0-45 length of eye. Hypopygium as in Text-fig. 549. 



nobilis (Walker) (p. 655) 



