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Evergreen Bagworm Moth - Thyridopteryx ephemeraeformis | by T Martin2010
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Evergreen Bagworm Moth - Thyridopteryx ephemeraeformis

Thanks to Maury J. Heiman on BugGuide, I know this is a first for my state.


Five Thyridopteryx species are found in America north of Mexico, the adults have a wingspan of 17-36mm. They range from Massachusetts south to Florida and west to Nebraska, Colorado, and New Mexico, adults flying from August to October.


The food of this species is various trees, shrubs and herbaceous plants. A pest of red cedar. Larvae drag around their cases while feeding. When ready to pupate they attach the cases with silk to a branch. Males squeeze their way out, often losing much of their wing scales in the process. They seek wingless, legless females who never leave their bags. The males insert their abdomen to mate, and the females lay their eggs inside their own cases. Eggs overwinter and after hatching they disperse and begin forming their own bags.


Predators include the common Ichneumon wasp Itoplectis conquisitor.

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Taken on September 8, 2012