Coeliodes (Curculionidae)
The three British species of Coeliodes are pretty easy to separate using the following simple key (adapted from Morris, 2008).

1. Pronotum with a blunt prominence on each side in middle. transversealbofasciatus. (Goeze)
-- Pronotum simple. 2.
 
2. Rostrum black. 2.1-2.8mm. rana (Fabricius)
-- Rostrum red. 2.8-3.4mm ruber (Marsham)


Reference
Morris, M.G. 2008. True Weevils (Part II) RES Handbooks.

transversealbofasciatus

rana

ruber

transversealbofasciatus

rana

ruber