Plebejus icarioides eosierra, the 'Eastern Sierra' Boisduval's Blue, at Kelso Valley near Sageland. April 7, 2014.

Female Plebejus icarioides eosierra, same location as above, on April 29, 2008.

Plebejus icarioides eosierra, also from the trip down Kelso Valley Road in 2008. They were common around their host, Lupinus excubitus.

Same day as above. The Eastern Sierra Blue was described in 1998 in Systematics of Western North American Butterflies, pp. 183-4.