370 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



and in the middle with an entire longitudinal groove; 

 marginal cell open at wing margin, very brown or pale 



brown at base; claws of posterior tarsi bidentate 



Amphibolips p. 404 



11. Cheeks, at most, half 'as long as eyes; antennse with apical 



third thicker than joints five to six; marginal ceir elongate 



and open at wing margin 14 



Cheeks more than half as long as eyes and without a furrow; 

 flagel filiform, apical third not thicker than joints five to 

 six; head not, or scarcely* wider behind eyes; prothorax 

 not narrowed medially, or at least not strongly con- 

 stricted; parapsidal grooves entire 12 



12. Base of scutel with two sharply impressed foveae; ventral 



spine, at most, a little longer than thick 13 



Base of scutel without fovese, but with a transverse furrow 



Solenozopheria p. 434 



13. Claws of posterior tarsi entire; mesothorax often more or 



less polished; base of scutel with two very sharply sepa- 

 rated foveas, which are more or less triangular or quad- 

 rangular, and often very large; large triangular lateral 

 foveae not extending upwards and inwards, but lying on the 

 free side of the scutel; antennae 13- to 14-jointed, third 

 joint shorter, or a little longer than the fourth.. .Aiilax p. 374 

 Claws of posterior tarsi bidentate; mesothorax polished or 

 nearly so Diastrophus p. 435 



14. Genera not as in Andricus; metathoracic ridges, except in 



Loxaulus, not straight and parallel; base of scutel with a 

 transverse furrow, or with two sharply limited foveae, 

 in the latter case the metathoracic ridges in the middle 

 elevation of the metathorax strongly arcuate or angularly 



separated 1$ 



Base of scutel with two sharply separated foveae; metatho- 

 rax with straight parallel ridges, or inferiorly somewhat di- 

 vergent, rarely distinctly but not sharply serrulate, parap- 

 sidal grooves sharp and entire, often indistinctly defined 

 anteriorly; mesothorax rarely transversely wrinkled; an- 

 tennae and tibiae not fimbriate; third joint of antennae 

 longer than fourth or equal as in A, fM&iVo/o. .Andricus p. 409 



15. Claws of posterior tarsi entire; antennae and tibiae not fimbri- 



ate; mesothorax glabrous 16 



Claws of posterior tarsi bidentate, mesothorax often abun- 

 dantly hairy, scutel usually with an uninterrupted trans- 

 verse groove 17 



16. Parapsidal grooves of the polished or moderately deeply 



wrinkled mesothorax very sharply defined; antennae with 

 fourteen to fifteen joints, third as long as, or longer than 



