......................................................................................... Cylydrorhinus - Frons strongly convex, clearly separated from rostrum; antennal scape not reaching anterior margin of eye when resting in scrobe; convex eyes........................................................................... Caneorhinus Key to Caneorhinus species recorded from Tierra del Fuego

1 Dorsal carinae of scrobe straight; vestiture composed only by seta-like scales; elytral intervals 1, 7 and 10 whitish................................................................................................... C. tessellatus

- Dorsal carinae of scrobe converging with median rostral carinae at rostrum base; vestiture composed by ovate, elongate and seta-like scales; elytral intervals 2, 4, 6 and 10 withish................................................ C. lineatus