Rhamphini
Guides
Isochnus flagellum
Isochnus flagellum is a small weevil in the family Curculionidae, tribe Rhamphini. The species was originally described as Orchestes flagellum by Erichson in 1902. It is known from high-latitude regions of North America including Alaska, Yukon Territory, and Northwest Territories. As a member of the genus Isochnus, it belongs to a group of leaf-mining weevils associated with birch and alder foliage.
Orchestes
flea weevils
Orchestes is a genus of flea weevils (Curculionidae) comprising six species in North America and additional species in Eurasia. Members are small beetles (2–4 mm) associated with woody host plants, particularly trees in Ulmaceae and Fagaceae. The genus was historically confused with Rhynchaenus, from which it has been redefined. Several species are significant pests: O. steppensis is a destructive invasive of elms in China and North America, O. alni (European elm flea weevil) damages elms in Europe and North America, and O. fagi attacks beech trees. Larval habits vary—most are leaf miners, though O. hustachei uniquely parasitizes aphid galls.