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Species Plebejus lupini - Lupine Blue - Hodges#4381

Butterfly near lake - Plebejus lupini - male Which Plebejus? - Plebejus lupini - female lupine blue - Plebejus lupini Plebejus lupini monticola group - Plebejus lupini - male Acmon Blue - Plebejus lupini - male butterfly, Acmon Blue ? - Plebejus lupini Plebejus acmon? - Plebejus lupini - female Plebejus lupini
Show images of: caterpillars · adults · both
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Lepidoptera (Butterflies and Moths)
Superfamily Papilionoidea (Butterflies and Skippers)
Family Lycaenidae (Blues, Coppers, Hairstreaks, Harvesters)
Subfamily Polyommatinae (Blues)
Genus Plebejus
Species lupini (Lupine Blue - Hodges#4381)
Hodges Number
Synonyms and other taxonomic changes
Icaricia lupini
common and widespread throughout most of its range
wingspan 17-29 mm
male upperside pale violet blue with narrow black borders and black hindwing spots surrounded by pink
female brown, often with blue sheen; hindwing spots surrounded by orange; black bar at end of forewing cell
underside pale bluish-gray with two rows of white-ringed black spots; outer hindwing row has metallic green centers; elongated orange spots between hindwing rows

larva grayish-yellow or pink with small black spots, green dorsal stripe, and pale oblique stripes
throughout western United States and southwestern Canada
mid-elevation mountain meadows, rocky outcrops, chaparral, and sagebrush
adults fly from mid-June to early July on the Canadian prairies, and until early August in British Columbia; in the Sierra Nevada of California, one flight from June-August; elsewhere, several flights from March-July
larvae feed on leaves, flowers, and fruits of several species of perennial wild buckwheat including Sulfur Flower (Eriogonum umbellatum) and Flat Top (Eriogonum fasciculatum) in the buckwheat family (Polygonaceae)
Life Cycle
one generation per year in the north; overwinters as a half-grown larva; eggs are laid singly on leaves and flowers
See Also
The male of the Acmon Blue is lighter/brighter than the Lupine Blue; the Acmon Blue is restricted to California, western Oregon, and western Nevada (see map).
Internet References
pinned adult images plus US distribution map, common name reference, description, biology, food plants, etc. (Butterflies and Skippers of North America)
pinned adult image [listed as Icaricia lupini] plus Canadian distribution map, description, food plants, biology, etc. (Butterflies of Canada; CBIF)
synonym reference [Icaricia lupini] (The International Lepidoptera Survey,