Comprehensive Description

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General Description

A medium-size (3.4-4.1 cm wingspan) grey-brown hepialid moth. Forewings are mottled light and dark grey-brown, with the lighter area forming a poorly defined stripe which angles from the wing base to the lower margin, then obliquely to the wing tip. The median area above this band is darker brown, as are a series of spots or blotches along the costa. The terminal area is also darker brown. Hindwings are dull grey-brown, unmarked. The fringes on all wings are checkered. Antennae in both sexes are reduced and hair-like. The reduced, hair-like antennae will identify gracilis as a Hepialid moth, and the dull brown mottled appearance will separate it from the other small Alberta hepialids, which have pink or reddish-brown forewings with silvery-white markings.


Creative Commons Attribution Non Commercial 3.0 (CC BY-NC 3.0)

© University of Alberta Museums

Source: University of Alberta Museums

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