100 OTIORHYNCHIDJE. [Ho rn. 



Tribe III. EXOPHTHALMIC!.* 



Rostrum longer than the head, usually quadrangular and dilated at tip, 

 the latter emarginate. Genae not or feebly emarginate. Head not prolonged 

 behind the eyes. Scutellum distinct. Elytra wider at base than thorax 

 (Omileus excepted), outer stria entire, not confluent with the next. Arti- 

 cular surfaces of hind tibiae internal, at least moderately cavernous. Claws 

 free. 



This tribe is constructed at the expense of the Cyphid.es as defined by 

 Lacordaire. It contains those genera in which the rostrum is elongate, 

 the tenth stria entire, and the genae not or very feebly emarginate. As thus 

 defined, it will probably contain all of the last six genera of the Cyphides. 

 In examining a series of Cuban species presented by Prof. Poey to the 

 American Entomological Society, I find the specimens of Exophthalmus 

 Sommeri having the fimbriae at the sides of the thorax as strongly marked 

 as in any of the genera allied to Tanymecus. The elytra are not, each one, 

 prominent at base, and the thorax is feebly bisinuate. It should constitute 

 a new genus of Tanymecini. In this tribe will be included ( Geonemus') 

 alternans, in which, however, the elytra are not wider at base than the 

 thorax. The structure of the thoracic parapleurae separates it from the 

 genera allied to Epiccerus, etc. 



The following groups may be recognized. 

 Submentum not pedunculate ; mentum broad. 



Humeri prominent ; thorax bisinuate at base Exoplithalmi. 



' Humeri very oblique or rounded. Thorax truncate 



at base Omilei. 



Submentum pedunculated ; mentum narrow. 



Humeri prominent. Thorax truncate at base Evoti. 



The last group shows strong affinities with the next tribe. 



Group I. Exophlbalml. 



Rostrum longer than the head, sub-quadrangular, slightly dilated at tip, 

 which is feebly emarginate ; genae moderately emarginate. Sub-mentum 

 not pedunculate, mentum broader than long, entirely concealing the 

 maxillae. Antennae 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 thorax 

 at base, or at least with the humeri very distinct, neither oblique nor 

 obliterated. Scutellum distinct. Articular surfaces of hind tibiae very 

 feebly cavernous, glabrous. Claws free. 



One genus represents this group in our fauna. 



LACHNOPUS Sch. 



LacTinopus Schonh. Cure, vi, 1, p. 380. 



Rostrum longer and narrower than the head, slightly broader at tip and 

 feebly emarginate. Vertex convex, separated from the front by a feeble 



*This tribe should be known as EVOTINI and would have been corrected had 

 .not page 81 been already printed. 



