100 PROCEEDINGS OF THE NATIONAL 3IUSEUM. vol.xxiii. 



►Stigma rather narrow; base of discoidal cell noi or hardly longer than the 

 apex of the second discoidal cell; hind wings with the first al)scissa of 

 radius as long or somewhat longer than the cubital transverse nervure. 



(777) Astreiiis Fijrster. 



Tribe X. PRISTOMERINI. 



1868. Pristomcrokliv, Family 4, Verb. d. naturh. Ver. pr. Rheinl., XXV, pj). 141 



and 149. 

 1894. Prisiomerhd, Tribe IV, Ashmead, Proc. Ent. Soc. Wash., Ill, p. 277. 

 1900. Pris(07nerini, Tribe X, Ashmead, Smith's Insects of New Jersey, p. 584. 



This tribe differs from the foregoing ])y having the middle vein in 

 the hind wings distinct^ entire, not obliterated toward the base. In 

 this character it agrees with the CreinasUni and the PJectii<cini^ but is 

 separated from both hy the hind femora being armed with a strong 

 tooth beneath, a little l)e3'ond the middle or toward their apices. 



Only two genera have been recognized, one being characterized 

 here for the first time, as follows: 



TABLE OP GENERA. 



Metanotuni completely areoiated, the median and the petiolar areas always separated; 

 stigma large, wide; areolet wanting. 



Hind femora considerably swollen, with a large tooth beneath a little beyond 

 the middle, followed by some small or minute teeth; metanotuni with the 

 areola hexagonal; transverse median nervure in hind wings slightly angu- 

 larly broken below the middle ( 778) Prislonierus Holmgren. 



Hind femora scarcely swollen, with a tooth beneath near the apex; metanotum 

 with the areola pentagonal; transverse median nervure in hind wings 



straight, not broken (779) Pristomeridki Ashmead, new genus. 



(Type, Porlzon ngilis Cresson.) 



Tribe XI. CREMASTINI. 



1868. Crcmastoidic, Family 5, Forster, Verb. d. naturli. Ver. pr. Rlieinl., XXV, 



pp. 141 and 149. 

 1887. Cremastina, Tribus, Thomson, Opus. Ent., XI, p. 1048. 

 1894. Cremastmi, Tribe V, Ashmead, Proc. Ent. Soc. Wash., Ill, p. 277. 

 1900. C'reiiKtsiiwi, Tribe XI, Ashmead, Smith's Insects of New. Jersey, p. 584. 



Differs from the Pristomerini in having simple, unarmed hind 

 femora, and from the Plectiscini^ in the character of the head, which 

 is larger, by the clypeus being neither convex nor compressed from 

 the sides, and by the normally formed hind tibia?. 



Most of the species placed in our lists under the genus Cremastux 

 do not belong to it, but should be placed in the genus Tenielucha 

 Forster, in the tribe Porizonini. 



Only two genera have been recognized, as follows: 



table oe genera. 



Head not wider than the thorax; clypeus distinctly separated froui the face; radius 

 originating from the middle of the stigma (780) Cremashis Gravenhorst. 



Head wider than the thorax; clypeus separated from the face at the sides only; radius 

 originating from behind the middle of the stigma ..( 781 ) Demophoi-us Thomson. 



II 



