Mating Invasive Green Weevils

Subject: Bug id
Location: Northern Maine
July 27, 2014 9:27 pm
Saw these getting busy on my boat trailer tire as I attempted to put air in it.
Signature: Nathan

Mating Pale Green Weevils
Mating Invasive Green Weevils

Dear Nathan,
We believe these are mating Green Immigrant Leaf Weevils,
Polydrusus sericeus, and according to BugGuide: “introduced from Europe, where it is widespread” and it feeds on “primarily Yellow Birch (Betula alleghaniensis).”  Since you image is not in critical focus, they might also be Pale Green Weevils, Polydrusus impressifrons, and they are also an invasive, introduced species.  According to BugGuide:  “native to Europe, adventive in NA (introduced ca. 1913)” though this date discrepancy information is also provided:  “earliest record in our area: NY 1906.”  Finally, BugGuide offers this comparison information with the Green Immigrant Leaf Weevil:  “P. impressifrons is similarly colored but has less conspicuous black lines in elytra, relatively small eyes positioned laterally and parallel to midline, least interocular distance 1.5 to 2 times width of eye, and elytral margins slightly sinuate and widest near apex (compare images of both species).”

Thanks for taking the time. Looks like the pale green after looking at some images. I guess it’s European bug time around here.

Originally we thought Pale Green Weevils, and then we thought the Green Immigrant Leaf Weevils were more likely.  Thanks for the confirmation.


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