IUCN threat status:

Not evaluated

Comprehensive Description

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General Description

A medium-size moth (3.0-4.0 cm wingspan) with grey forewings and white hindwings. Forewings are a clear even bluish-grey. Basal and antemedian lines are doubled and incomplete, and the postmedian line is a thin, dark complete line. There is a thick, black basal dash and a short thick dash in the anal angle. The area between the orbicular and reniform spots is also filled with black scales in an X or square shape, hence the name. Overall appearance is clean and rather elegant. Hindwings are shining white, with some darkening along the margin. The antennae are simple, and the sexes are similar, except the female is somewhat darker, especially on the hindwings. See also Acronicta radcliffei, A. grisea, A. interrupta and A. furcifera, all of which are either darker grey or with more extensive dark patterning.

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© University of Alberta Museums

Source: University of Alberta Museums

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