Historical butterfly specimens
The Xerces Blue specimens belong to the Barnes collection deposited at
the Smithsonian National Museum of Natural History. Two of them were
collected on April 26th, 1923. The Silvery Blue specimens were mostly
collected between 1927 and 1948, in Haywood City, Santa Cruz, Oakland,
San José, Fairfax and Marin County (these locations surround San
Francisco Bay).