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Glaucopsyche piasus
Imago in Wayne Co, central Utah
Conservation status
Apparently Secure  (NatureServe)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Lepidoptera
Family:	Lycaenidae
Genus:	Glaucopsyche
Subgenus:	Glaucopsyche (Glaucopsyche)
Species:	G. piasus
Binomial name
Glaucopsyche piasus Boisduval, 1852
Synonyms
Lycaena catalina Reakirt, 1866

Glaucopsyche piasus, the arrowhead blue, is a western North American butterfly of the family Lycaenidae. It is a locally common butterfly that favors prairie, open woodland, and woodland edges and trails.

Description

This species has checkered fringes. The upper-side of males are violet blue with a wide border, females are duller. The underside is gray with many small black spots. The hindwing has a post-median band of white arrowheads pointing inwards. The wingspan is between 1 1/8 inches to 1 3/8 inches wide (2.9 - 3.5 cm). The males patrol during the day near host plants, while females lay eggs on flower buds of the host plant. There is one brood from between March to July. Larvae feed on lupine (Lupinus) and milkvetch (Astragalus) species. The adults feed on flower nectar.

References

1. "NatureServe Explorer 2.0". explorer.natureserve.org. Retrieved 2023-12-14.
2. "Glaucopsyche piasus". Global Biodiversity Information Facility. Retrieved 5 July 2021.
3. "Glaucopsyche piasus". explorer.natureserve.org.
4. "Arrowhead Blue Glaucopsyche piasus (Boisduval, 1852) | Butterflies and Moths of North America". www.butterfliesandmoths.org. Retrieved 2023-12-14.

External links

• Arrowhead Blue, Canadian Biodiversity Information Facility

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