
 Sitona is a large genus of weevils in the family Curculionidae native to the Nearctic and Palaearctic regions. Over 100 species have been described. Sitona is easily distinguished from related genera by flat, recumbent scales on the mandibles, by the absence of an oval scar on the mandibles, by short and broad rostrum with a deep, longitudinal, me...
Found on 
http://en.wikipedia.org/wiki/Sitona

Sitona is a genus of Snout Beetles (Curculionidae) represented by twenty British species that feed on the leaves of leguminous plants, mainly at night.
Found on 
http://www.probertencyclopaedia.com/browse/BSA.HTM
  No exact match found.