Comprehensive Description

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General Description

A grey geometrid with bold, black transverse lines on the forewing; the four dark costal wedges typical of the genus continue as AM, PM and median lines, the median line broadest and incorporating the discal spot. AM and PM line sometimes broken. Hindwing slightly paler, speckled grey with a faint (sometimes absent) PM line and discal spot, slightly darker marginal area. Sexes not dimorphic. Similar to M. decorata, which has a speckled, not uniform grey, forewing ground colour, and lacks the thickened median line. Members of the genus Digrammia have a dark patch midway down the forewing submarginal area, absent in M. bitactata.


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© University of Alberta Museums

Source: University of Alberta Museums

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