Available from the Essig Museum web site at the link: http://essig.berkeley.edu/documents/cis/cis06_5.pdf
The treatment is technical, but (with patience and perseverance) helpful for working on California Stratiomyidae. Some comments:
There are keys to California genera and species...but they are not complete as known and recognized by the author in 1960: e.g. the Euparyphus-Aocletus complex appears in couplet 16 of the key to genera, but is not discussed further; and the subfamily Pachygastrinae is not treated). Also, genus Odontomyia is treated under the name Eulalia.