Alamos, Sonora, Mexico. August 21, 2011
Rhinocheilus antonii are very common on the roads at night around Alamos. Some carry a spotted pattern similar to Rhinocheilus lecontei, but many are unspotted or nearly so, like the beautiful specimens pictured here. Some workers consider Rhinocheilus antonii to be a subspecies of Rhinocheilus lecontei, and others lump them all into one species (lecontei). To my eye, antonii are a bit bulkier in build than the Rhinocheilus lecontei found further north.
My Flickr album for this species is here.