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General Description

The forewing is distinctly marked with a white costal triangle before the postmedian area. The inner half of the forewing is pale yellowish brown, while the remainder is darker brown with some black shading towards the anal angle. The outer margin is sometimes pale yellow and reticulated with darker brown. In some specimens there are small irregular purple blotches through much of the wing. In the subspecies C. p. forbesi which occurs in western areas and has some intergrades in SW Alberta the forewing is overall more orange-brown and the triangle is more slender. The larva is green with darker green mid-dorsal and sub-dorsal stripes. The head is brownish yellow with some black in the ocellar area and a dark lateral stripe. (Duncan 2006)

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© University of Alberta Museums

Source: University of Alberta Museums

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