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Species Pero modestus - Pero modesta - Hodges#6759

Pero ancetaria - Pero modestus Pero modesta/modestus - Pero modestus Pero ancetaria - Pero modestus possible Pero modestus - Pero modestus possible Pero modestus - Pero modestus Pero modestus Pero modestus Pero modestus
Show images of: caterpillars · adults · both
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Lepidoptera (Butterflies and Moths)
Superfamily Geometroidea (Geometrid and Swallowtail Moths)
Family Geometridae (Geometrid Moths)
Subfamily Ennominae
Tribe Azelinini
Genus Pero
Species modestus (Pero modesta - Hodges#6759)
Hodges Number
Synonyms and other taxonomic changes
Pero modestus Grossbeck, 1910
There are 18 named Pero species in America north of Mexico.
Wingspan 30-38 mm.
No shading along the well defined antemedial line.
There are 1-6 small white dots along the terminal line in the costal half.
Small white discal spot varies from round to angular shaped and is often lined with a narrow broken ring.

Terminal line thickens near anal angle where there are 3-4 dark, near triangular spots.
Sinuous postmedial line is present.
Southern and western Texas to Arizona then north to Colorado and southern Utah.
Adults fly April through September.
Poole reared on willow (Salix) in Arizona. (1)
Life Cycle
See Also

Three other species are similar:
Pinned photos of all three compared at Canadian Biodiversity Information Facility
Works Cited
1.A taxonomic revision of the New World moth genus Pero (Lepidoptera: Geometridae).
Robert W. Poole. 1987. USDA Technical Bulletin 1698: 1-257.