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Species Alypia ridingsii - Ridings' Forester - Hodges#9319

Alypia ridingsi - Alypia ridingsii Riding's Forester Moth - Alypia ridingsii Riding's Forester Moth - Alypia ridingsii Caterpillar on primrose species - Alypia ridingsii Ridings' or Mountain Forester, Alypia ridingsii - Alypia ridingsii Lepidoptera - Alypia ridingsii Ridings' Forester - Alypia ridingsii - female Riding's Forester - Alypia ridingsii
Show images of: caterpillars · adults · both
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Lepidoptera (Butterflies and Moths)
Superfamily Noctuoidea (Owlet Moths and kin)
Family Noctuidae (Owlet Moths)
Subfamily Agaristinae
Genus Alypia
Species ridingsii (Ridings' Forester - Hodges#9319)
Hodges Number
9319
Size
wingspan about 30 mm
Identification
Adult: forewing black with large curving white patch in PM area (broken by black veins), a white triangular basal patch, and a white spot between these two areas; hindwing black with two white patches; no colored "shoulder pads" on thorax; abdomen and thorax black, hairy; middle leg with tuft of orange hair-like scales
Range
western distribution: British Columbia to California
Habitat
adults visit flowers during the day
Season
adults fly in spring
Food
Various members of the Evening Primrose Family (Onagraceae) have been reported as larval hosts: Eulobus (Camissonia) californicus, Camissoniopsis (Camissonia) bistorta, Camissoniopsis (Camissonia) pallida, Clarkia rhomboidea.
See Also
Androloma maccullochii is similar but has hairy yellowish "shoulder pads", a straighter oval-shaped white patch in PM area of forewing, and more prominent black veins on the hindwing (compare images of both species at CBIF)
Internet References
A detailed discussion of the pre-adult life history of A. ridingsii starts at the bottom of pg. 92 of Comstock & Dammers (1942).
A half-page discussion of the caterpillar (last instar?) appears on pg. 13 of the USDA Tecnical Bulletin 1135 by Crumb (1956).
Range maps appear on the MPG page and this Neartica page.
Some Anza-Borrego Moths and Larvae: scroll down to 3rd row of photos for live adult and larva images of A. ridingsii plus food plants.