Invasive Sericini June beetle species in vermont


There are two species of invasive June beetles in the tribe Sericini in Vermont; Nipponoserica peregrina, and Maladera formosae. They can be distinguished from each other and native species using external morphology but this guide also includes identification using the genitalia. Both species are common in Vermont.

Species list

  • Nipponoserica peregrina
  • Maladera formosae


Nipponoserica peregrina male.

Maladera formosae male.

Identification through external morphology

Maladera formosae

Maladera formosae can be separated from Nipponoserica peregrina by It's rounder and darker brown appearance. The genitalia are very distinct between these two species. It is also resembles the native genus Serica but can be separated through dissection or by a few small features described here at

Nipponoserica peregrina

See details above.

Posted on May 03, 2023 05:03 AM by origamilevi origamilevi


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