Comprehensive Description

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General Description

The adults come in two distinct forms, the most recognizable one with two evenly curved, bold black lines across the forewing, the other with the lines more faint and thin. The dark-lined form was once thought to be a distinct species (ponderosa B. & McD.). Very similar to M. decorata, but rippertaria lacks the contrasting dark submarginal band distal to the PM line. Decorata also usually has a thin white area bordering the outer margin of the PM line of the hindwing, absent in rippertaria. The typical form of rippertaria is reminiscent of M. neptaria, but neptaria has a two-toned PM line (dark with a light distal border). The PM line is also much more sinuous in rippertaria. Until recently North American rippertaria were treated as a separate species, M. hebetata, and were placed in the genus Semiothisa; hebatata is now considered to be a North American subspecies of rippertaria. (Scoble, 1999) 

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© University of Alberta Museums

Source: University of Alberta Museums

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