| Polydrusus formosus (Mayer, 1779) |
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Scientific name: Polydrusus formosus (Mayer, 1779) Common name: Other names: Other scientific name: Polydrusus sericeus. French name: Charançon vert soyeux Order: Coleoptera Family: Curculionidae Wingspan : 5-7 mm Biotope: On the leaves of many trees and bushes. Geographic area: Europe, North America. Observation period : April to August. |
You can distinguish weevils of the Polydrusus genus compared to weevils of the Phyllobius genus from the shape of the scrobe (line where the antenna is inserted). It is rather straight, short and hardly visible on Phyllobius while it is curved and extends as far as below the eyes on Polydrusus. Polydrusus formosus has an oblong-shaped body. It is covered with green scales. The elytra show thin longitudinal black lines which appear punctuated. The pronotum is marked by sparse bare dots which appear black. The head is elongated. The eyes are black, large and close together. They are rather flat and slightly elongated. The antennae, light in colour, end with a black club. The legs are yellowish to brownish and may bear some green scales. Polydrusus formosus feeds on leaves. Larvae feed on roots. There is a possible confusion with Polydrusus impressifons and Polydrusus prasinus. Polydrusus impressifons has smaller and more distant eyes. The longitudinal black lines on the elytra are less marked. The rostrum is slightly shorter. Polydrusus prasinus has green legs and the antennal club is not black and does not contrast with the rest of the antennae. |
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A Polydrusus with large close eyes, brownish legs with a few green scales, black antennal clubs, here we have Polydrusus formosus. |
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Another view of Polydrusus formosus. And for the plant on which I found it, it is the tablecloth of the garden table... |
André Bon January 2023
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