ASHMEAD : CLASSIFICATIOIM OF THE CHALCID FLIES 263 



16. Mesonotum closely, distinctly, umbilicately punctate 17 



Mesonotum not umbilicately punctate, either smooth or nearly, or shagreened or finely, regularly sculp- 

 tured 26 



17. First joint of the flagellum long, as long as the scape or longer 18 



First joint of the flagellum not especially long, always much shorter than the scape 19 



18. Head with a deep antennal furrow, the front ocellus placed within the furrow. 



? Known to me in 9 sex only. Bephrata Cameron. 



? Known to me in ? sex only Aximogastra Ashmead. 



19. Mesonotum without or with incomplete furrows 28 



Mesonotum with distinct, complete furrows. 



Head sometimes with a deep antennal furrow, but the front ocellus is never situated in the fur- 

 row 20 



Head with a deep antennal furrow, the front ocellus always placed in the furrow at its apex. 



Prodecatoma Ashmead. 



20. Marginal vein always distinctly longer than the stigmal vein, the postmarginal vein well developed, 



sometimes very long, always longer than the stigmal 21 



Marginal vein short, not or scarcely longer than the stigmal vein, usually shorter, the postmarginal 

 vein not well developed, not longer than the stigmal 27 



21. Hind tibiae with 2 apical spurs 22 



Hind tibiae with 1 apical spur Phylloxeroxenus Ashmead. 



22. Postmarginal vein only a little longer than the stigmal vein 23 



Postmarginal vein very long, fully twice as long (or longer) as the stigmal vein 25 



23. Marginal vein always distinctly longer than the stigmal vein 24 



Marginal vein only a little longer than the stigmal Eurytomocharis Ashmead. 



24. Fuuicle 5-jointed, the joints at apex excised above and pedicellate with long, whorled hairs ; body of 



abdomen rather small, subovate, the petiole usually longer than the hind coxae, the fourth segment, 

 counting the petiole as the first, the longest Eurytoma Illiger. 



25. Scape of antennae long, with a tooth or tubercle at apex beneath ; joints of funicle long, slightly con- 



tracted at the middle, each joint with two whorls of long bristles Eudoxinna Walk. 



26. Marginal vein slender, at least one and a half times as long as the stigmal vein, the postmarginal vein 



not longer than the stigmal Xanthosoma Ashm. 



Marginal vein rather stout, not longer than the stigmal vein : funicle 4-jointed, the joints oval, briefly 

 petiolate at apex, with long, sparse hairs ; abdomen small, oval, the petiole about twice as long as 

 thick ; dorsal segment 2-4 subequal Systole Walk. 



27. Funicle 4-jointed, the joints excised at apex above, the basal or thickened portion about twice as long 



as thick, with long hairs above ; abdomen small, globose, the petiole rugulose, the fourth segment the 



longest Systolodes Ashmead. 



Funicle 4-jointed, the joints briefly pedunculate at apex, with sparse, long, irregular hairs ; body of 

 abdomen oval, the petiole short, stout, the fourth segment the largest Bruchophagus Ashmead. 



28. Head with a deep antennal furrow Decatomidea Ashmead. 



Tribe IV. Rileyini. 

 In this tribe the antennse are alike, or very similar, in both sexes and 13-jointed, 

 with two or three ring-joints ; they are never 12-jointed or less as in the other tribes. 



