Parthenogenetic reproduction has not precluded the genesis of extensive genetic variation in the whiptail lizard, Cnemidophorus tesselatus. In Conchas Lake State Park, San Miguel County, New Mexico, the population of C. tesselatus includes pattern class C, with 4 allozyme variants, and pattern class D, with 3 allozyme variants. In 1988, we obtained a lizard in the park, described herein, with a unique color pattern and unusual meristic characters, which indicate that occasional females of C. tesselatus continue to be capable of producing neonates phenotypically different from the mother.