OTIORIIYNCHIDAE. 455 



ginate. Head not prolonged beliiiid the eyes. Scutellum dis- 

 tinct. Elytra wider at base than thorax (Omileus excepted), 

 outer stria entire, not confluent with the next. Articular sur- 

 faces of hind tibite on the inner face, at least niodeiately cavernous. 

 Claws free. 



This tribe is constructed at the expense of the Oyphide.s as 

 deiined by Lacoi'daire. It contains those genera in which the 

 rostrum is elongate, the tenth stria entire, and the gente not or 

 very feebly emarginate. 



The following groups may be recognized : — 



iSiibmeiitmn not peduiiculato ; meiitum broad ; 



Humeri prominent; thorax bisinuate at base. Exopiithalmi. 



Humeri very oblique or rounded ; thorax truncate at base. OiiiLiii. 



Submentum pedunculated ; mentum narrow ; 



Humeri prominent ; thorax truncate at base. Evoti. 



The last group shows strong affinities with the next tribe. 



Group I.— Exophthalmi. 



Rostrum longer than the head, subquadrangular, slightly dilated 

 at tip, which is feebly emarginate ; genae moderately emarginate. 

 Submentum not pedunculate, mentum broader than long, entirely 

 concealing the maxillae. Antenna? moderate, scape at most merely 

 passing the eye. Scrobes narrow, moderately arcuate, passing 

 beneath the eyes. Thorax distinctly, at times feebly, bisinuate 

 at base. Elytra wider than the tliorux at base, or at least with 

 the humeri very distinct, neither oblique nor obliterated. Scutel- 

 lum distinct. Articular surfaces of hind tibia? very feebly cavern- 

 ous, glabrous. Claws free. , 



One species of Lachnopus, from Florida, represents this grouj) 

 in our fauna. 



Grou}) II — Omilei. 



Rostrum longer than the head, narrow, quadrangular, and 

 slightly dilated in front. Genai feebly emarginate. Thorax 

 truncate at apex and base. Elytra not wider than the thorax, 

 feebly emarginate at base, humeri either very obliipie or broadly 

 rounded. Articular surfaces of hind tibiie very feebly cavernous. 



'I'he differences between this group and the preceding are feeble, 

 and with other genera would probably be united with it. 



Two genera are at present known, one only native, and repre- 

 sented by one Texan species, Omileus epicseroides. 



