Very difficult to ID in the field without positive hostplant association. The individual below may actually be a Sqaure-spotted Blue (Euphilotes battoides).
Dotted Blue (Euphilotes enoptes) Lambs Canyon, Salt Lake Co., UT 16 June 2005
Dotted Blue (Euphilotes enoptes) Lambs Canyon, Salt Lake Co., UT 16 June 2005