Glaucopsyche piasus gabrielina - the 'San Gabriel Mountains' Arrowhead Blue - at Mt Islip, the Type Locality, on June 13, 2008.

Another view of gabrielina on host Lupinus elatus at Mt Islip on June 13, 2008.

Male dorsal gabrielina at Mt Islip. Subspecies gabrielina flies early June to early July, often with fellow Lupine-user Boisduval's Blue. June 13, 2008.