388 WILLIAM G. DIETZ, M.D. 



Family CURCULIONIDJE. 

 Tribe Ceutorhynchini. 



Beak variable, very slender, filiform in Mononychi, slender in 

 Ceutorhynchi, somewhat stouter in Cceliodes, until in the subtribe 

 Phytobii the beak becomes quite robust and short in some of the 

 species. Scrobes lateral or infra-lateral, directed against the eyes, 

 more rarely oblique and directed lieneath the eyes {Phytobii veri). 



Antennae generally slender, funicle G- or 7-jointed, club variable, 

 from short ovoidal to elongate, acuminate. Eyes rather large, finely 

 granulated, never closely approximate above, more or less concealed 

 in repose by prothoracic lobes (except Phytobii veri). Head sub- 

 coninal, occiput carinate ; prothorax generally wider than long, nar- 

 rowed in front, with lateral tubercles distinct in almost all, postocular 

 lobes more or less developed in all except Phytobii veri; scutel very 

 small or not visible. Elytra broadly oval, convex, in the majority 

 of species, more rarely elongate, generally distinctly wider at the base 

 than the prothorax and separately rounded at the apex. Pygidium 

 nearly perpendicular, exposed, larger in the males than in the females, 

 with a transverse elevated line (except Mononychis), a continuation 

 of the lateral margin of the abdomen and against which the apex 

 of the elytra abuts. In front of this elevated line is a short carina. 

 Prosternum canaliculate, the canal sometimes effaced before the an- 

 terior coxte (Phytobii), of variable length in front of the latter, 

 with or without antecoxal ridges, more or less deeply emarginate for 

 the reception of the beak in repose ; mesosternum canaliculate or 

 excavate in Mononychi and Qrliodes, declivous and entire in Ceu- 

 torhynchi and Phytobii (depressed and transversely sulcate in liiley- 

 onymus) ; side pieces wide, ascending between the prothorax and 

 the humeral angle of the elytra and generally visible from above ; 

 metasternum canaliculate in Moiionyehus (and some foreign Ofliodea), 

 emarginate or excavate anteriorly in some Cceliodex and forming the 

 posterior limit of the pectoral canal, entire in Ceutorhynchi and 

 Phytobii. First ventral segment longer than the second and sepa- 

 rated from it l)y a straight suture (see above); sutures 2-4 deeply 

 impressed and curved backward on the sides. Fifth ventral seg- 

 ment longer than either of the two preceding segments (except 

 Rilexjonymus) ; anterior coxae conical, not contiguous, middle coxae 

 rounded, entirely enclosed by the coxal cavities (open within in 

 Rileyoiiymm) and generally more widely separated than the anterior. 



