124 M. W. R. de V. GRAHAM 



- Pronotal collar sharply margined anteriorly, at least in the middle but usually 



throughout ; anterior margin of clypeus tridentate, edentate, or with a 

 median tubercle ; second gastral (fourth abdominal) tergite at least slightly 

 shorter than the basal tergite, sometimes wholly concealed beneath it . 3 



2 (1) Anterior margin of clypeus bidentate. Gena with a large fovea above base of 



mandible. Mesoscutal notauli incomplete. Second tergite of gaster 

 (fourth abdominal) large, in female (Text-figs. 96, 100) as long as or longer 

 than the basal tergite . . . SPHEGIG ASTER Spinola (p. 124) 



- Anterior margin of clypeus tridentate. Gena with at most a very narrow 



fovea along oral edge above base of mandible. Notauli usually traceable 

 nearly or quite to hind margin of mesoscutum, though very superficial 

 posteriorly. Second tergite of gaster (fourth abdominal) much shorter than 

 the basal tergite SYNTOMOPUS Walker (p. 137) 



3 (1) Scutellum with a discal fovea. 



Basal tergite of gaster very large, as in Cvyptoprymna. Anterior margin 

 of clypeus edentate, almost truncate . . NOTOGLYPTUS Masi (p. 140) 



- Scutellum without a discal fovea. The other characters rarely present in 



combination ........... 4 



4 (3) Basal tergite of gaster very large, at least slightly longer than broad, strongly 



convex, concealing or almost concealing the remaining segments, its hind 

 margin straight or nearly so. Anterior margin of clypeus either produced 

 and shallowly emarginate, or tridentate ...... 5 



Basal tergite of gaster not longer than broad, not nearly concealing the 

 remaining segments, except very rarely in some Toxeuma, which have the 

 anterior margin of the clypeus truncate ; the hind margin of the tergite 

 often broadly emarginate ......... 6 



5 (4) Anterior margin of clypeus produced and shallowly emarginate medially. 



Gastral petiole reticulate, in female about twice, in male more than twice, 



as long as broad CRYPTOPRYMNA Forster (p. 140) 



Anterior margin of clypeus tridentate. Gastral petiole longitudinally striate, 

 in female not longer than broad, in male at most 1-5 times as long as broad 



NOVITZKYANUS Boucek (p. 141) 



6 (4) Anterior margin of clypeus without teeth or with at most a very small median 



tubercle. Hind margin of basal tergite of gaster straight or weakly bi- 

 sinuate. Palpi in male normal . . . TOXEUMA Walker (p. 144) 



Anterior margin of clypeus tridentate. Hind margin of basal tergite of 

 gaster broadly, almost semicircularly emarginate. Maxillary palpi of male 

 with the terminal segment, or the penultimate segment, strongly swollen to 

 form a metallic bladder-like structure ....... 7 



7 (6) Fore wing with a distinct speculum ; at least the proximal third of the basal 



cell bare. Maxillae of male with penultimate segment of palpus strongly 

 swollen, the terminal segment small and clavate or subclavate ; stipites not 

 enlarged CYRTOGASTER Walker (p. 141) 



- Fore wing without a speculum ; basal cell wholly pilose. Maxillae of male 



with terminal segment of palpus strongly swollen ; stipites also swollen 



POLYCYSTUS Westwood (p. 144) 



SPHEGIGASTER Spinola auctt. 



Sphegigaster Spinola, 181 1 : 149, no. n. Type-species : Diplolepis pallicovnis Spinola, 1808, 



by designation of Ashmead, 1904 : 330. 

 Merismus Walker, 1833 : 371, 375, 377, ex parte [Divisions 1, 3]. 



