Smoky Arrowhead Blue - Glaucopsyche piasus umbrosa
Glaucopsyche piasus umbrosa, the 'Smoky' Arrowhead Blue, was flying off Old Highway 80 near Guatay in rural San Diego Country on May 11, 2013.
Smoky Arrowhead Blue - Glaucopsyche piasus umbrosa
Another umbrosa above and below on the same day. The host is a Lupine - Lupinus formosus.
Smoky Arrowhead Blue - Glaucopsyche piasus umbrosa
Special thanks to Andrew Kim for the location; I'd been on the lookout for these many times up at Laguna Meadow, the Typle Locality, and had never found them there.

©Dennis Walker