Flea-weevil
Guides
Isochnus sequensi
Isochnus sequensi is a flea-weevil (Curculionidae: Rhamphini) that creates leaf mines on Salix fragilis (crack willow). The species has been documented as a host for multiple eulophid parasitoid wasps in northwestern Russia. It belongs to a genus of small weevils associated with willow and poplar species.
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.
Orchestes steppensis
European Elm Flea Weevil, Elm Flea Weevil
Orchestes steppensis is a small flea-weevil (2.6–3.2 mm) native to the Eastern Palaearctic Steppe region and now invasive in North America. It is a serious pest of elm trees (Ulmus spp.), with adults feeding on leaves and larvae mining leaf tissue. The species was previously misidentified as O. alni or O. mutabilis in China. It completes one generation per year in Xinjiang, China, with overwintering adults emerging in late March to early April. The species exhibits strong olfactory-mediated host location, with documented preferences for specific plant volatiles.
Tachygonus centralis
flea weevil
Tachygonus centralis is a species of flea weevil described by John Lawrence LeConte in 1868. It belongs to the family Curculionidae, the largest family of beetles, commonly known as weevils or snout beetles. The species is known to occur in North America. As a member of the genus Tachygonus, it shares the characteristic flea-like jumping ability that gives these weevils their common name.
Tachygonus lecontei
flea weevil
Tachygonus lecontei is a species of flea weevil in the beetle family Curculionidae. It is found in North America. The species was described by Gyllenhal in 1833. As a member of the flea weevil group, it belongs to a lineage characterized by their small size and jumping ability.