SYNOPSIS OP GENERA. 33 



17 (18) Scutellum laterally margined. Dryocosmus, Gir. 



18 (16) — not margined. 



19 (20) Mesonotum quite smooth, with complete deep parapsidal fur- 



rows ; scutellar fovea? in front transverse. Entropha. 



20 (19) Mesonotum not completely smooth, the parapsidal furrows 



not deep ; scutellar fovea} in front curved. 



Spathogaster, Htg. 



21 (16) Scutellar fovea3 separated. 



22 (25) The first and second joints of the flagellum equal, or the first 



shorter than the second. 



23 (24) Antenna? with the $ 14-, with the $ 13-jointed; the first two 



joints of the flagellum unequal ; basal fovea of scutellum very 

 large ; radial cellule not twice as long as wide. Isocolus. 



24 (23) Antennae with the $ 15-, with the ? 13-jointed; the first two 



joints of flagellum of equal length ; basal fovea of the 

 scutellum small ; radial cellule twice longer than wide. 



Synophrys. 



25 (22) The first joint of flagellum longer than the second. 



26 (27) The second joint of hinder tarsi not as long as the last. 



Dryoteras, Foer. = Teras, Htg. 



27 (26) The second tarsal joint as long as the last. 



28 (29) Metanotum very strongly declivous ; the apex of the scutellum 



lying very high over the base of the abdomen ; the first joint 

 of the flagellum very strongly incised at the apex, much 

 broader than at the base. Trigonaspis. 



29 (28) Metanotum not very strongly declivous ; the apex of the 



scutellum not very high over the base of the abdomen ; the 

 first joint of the flagellum at the apex not broader than at 

 the base. 



30 (33) Mesonotum quite smooth. 



31 (32) Face sharply striated ; central area of mesonotum with a more 



or less complete central furrow. Diastrophus. 



32 (31) Face not striated ; middle lobe of mesonotum without a central 



furrow. Liodora. 



33 (30) Mesonotum not quite smooth. 



34 (37) Mesonotum alutaceous, rugose, bare or shortly haired ; the 



apex of the abdomen not bearing silky hair ; the antenna? 

 and legs not stiffly haired. 



35 (36) Mesonotum transversely rugulose. Callirhytis. 



36 (35) — not transversely rugulose. Andricus. 



37 (34) — punctured, not rugulose ; covered more or less 



thickly with long hairs. 



38 (39) Abdomen at the apex covered with silky, woolly hairs. 



Cynips. 



39 (38) — — — not covered with silky, woolly hairs. 



40 (41) Antenna? and legs with coarse, stiff, erect hairs. Dryophanta. 



41 (40) — — — without coarse, stiff, erect hairs. 



Aphilothrix. 



42 (1) Winged, seldom wingless ; the areolet lying distant from the 



base of the radial cellule. 



43 (54) The second abdominal segment at the base smooth, without 



furrows. 



44 (47) The second abscissa of the radius curved ; radial cellule at the 



base and apex open ; areolet absent. 



VOL. IV. 3 



