General: Lupine Blues (Plebejus lupini) are small butterflies that are sexually dimorphic. Males are blue above, while females are brown above. Orange band on hindwing may be divided into separate spots.

Taxonomy: Family: Gossamer-wing Butterflies (Lycaenidae); Subfamily: Blues (Polyommatinae).

Comments: This specimen, photographed on the North Rim of the Grand Canyon, could be an Acmon Blue (Plebejus acmon).