OT10RIIYN(;iriDAE. 453 



stria confluent with the next inner at one-third from the base. 

 Metasternuni moderately long. 



The rostrum is always acutely oniarginate in IVont and at the 

 sides, and in all our genera there is a fine median groove. The 

 supports of the deciduous pieces are usually very prominent, and 

 the deciduous pieces are (as far as seen) elongate, glabrous, falci- 

 form, and acute at tip. 



The following groups may be recognized: — 



Claws free ; articular surfaces of liincl tibiae cavernous ; 



Elytra wider at base than the thorax, humeri prominent. Cyphi. 



Elytra oval, not wider at base than thorax, humeri rounded. Artipi. 

 Claws connate ; articular surfaces of hind tibiaj not cavernous ; 



Elytra oval, humeri roundcid, body apterous. Aphkastl 



Group I. — Cyphi. 



Humeri prominent, elytra wider at base, wider than the thorax. 

 Scutellum distinct. Body winged. 



Our genera are few in number, and may be distinguished as 

 follows : — 



Articular surface of hind tibise scaly ; scape passing the eyes. &ompsus. 



Articular surface of hind tibise glabrous ; scape not passii^g the eyes ; 



Scape moderate, scrobes long, passing beneath the eyes ; scutc^llum 



small, triangular. Cyphus. 



Scape short, stout, scrobes short, suddenly arcuate; scutelhim rather 



large, oval. .BrachystylUs. 



Brachystylns has been placed by Lacordaire among the Otio- 

 rhynchini, but the entire structuije is that of the Cyphini, notwith- 

 standing the slight irregularity in the form of the scrobes. 



Two species of Cyphus in Arizona, and one of each of the 

 other genera in the Atlantic States are the only representatives 

 ftnown in our fauna. 



Group II. — Artipi. 



Elytra oval or oblong, not wider at base than the thorax, humeri 

 oblique, or broadly rounded. Scutellum distinct. Antennaj long, 

 scape passing the eyes behind. Articular surfaces of hind tibiie 

 cavernous. Rostrum rather deeply notched behind the base of 

 the mandibles. 



The essential difference b(!tweeu this group and the preceding 

 is found in the form of the elytra. The antennai (especially the 



