458 CLASSIFICATION OF THE RHTNCHOPHOROUS COLEOPTERA. 



with the next about ^ from the base, or abbreviated at that point, 

 or interrupted, the continuation commencing behind tlie middle 

 and extending to the tip. The prothorax is bisinuate at base 

 (Compsa, Brachystylus and Bradhythj^sus) , truncate or feebly 

 rounded in Tanymecus, Aphrastus, and the genera with connate 

 el3'tra. The eyes are rounded and the prothorax not lobed in all 

 of our genera. 



Four groups are indicated in our fauna. 



Elytra connate, humeri not prominent, .... Symmathetes. 

 Elytra not connate, Immeri angulated ; 



Claws connate, Aphrasti. 



Claws separate ; 



Prothorax truncate at base, Tanymeci. 



Prothorax bisinuate at base, CypM. 



Next to this tribe come the Entimini, large and brilliant insects 

 of South America ; the rostrum is stout, not so broad as in the 

 last two tribes, deeply einarginate at tip, perpendicular on the 

 sides, thickened below at the tip, with the antennal grooves deep 

 and oblique ; the apical scar of the mandibles is very large, cir- 

 cular and not prominent. The eyes are pointed below, and the 

 pro thoracic lobes large. The prothorax is comparatively small, 

 and bisinuate at base ; the elytra at base very broad, with prom- 

 inent humeri, gradually narrowed and acute behind ; the outer- 

 most stria is entire. The edge of the elytra and the ventral 

 sutures are densely fringed with short hair ; the claws are not 

 connate. 



Two insects presenting anomalous characters remain to be con- 

 sidered, each indicating a separate tribe. 



The first is found abundantly in Oregon ; the beak is two and 

 a half times as long as the head, moderately slender, dilated and 

 auriculate at tip, which is deeply emarginate ; the grooves are 

 visible from above, short, broad and deep, prolonged ver}'^ indis- 

 tinctl}^ in an oblique direction ; the apical scar of the mandibles 

 is large and circular, but not prominent. The eyes are nearly 

 round, and not prominent. The antennae are slender, and not 

 different in form from those of Otiorhynchus. The prothorax is 

 rather small, a little narrowed in front, not lobed, truncate behind. 

 Elytra wider at base than the prothorax, humeral angles obtuse 

 distinct, feebly rounded at the sides, obliquely narrowed behind ; 

 scutellum distinct. First ventral segments feebly sinuate, the 

 others straight ; side pieces of metasternum distinct. Legs slen- 



