provides an evolutionary foundation to the nonnenclature of parthenogen- 

 etic Cnemidophorus , which can only aid in the understanding of their 

 biology. I believe that C. dixoni is not a valid parthenospecies based 

 on these criteria. It was originally erected on the basis of color pa- 

 ttern and ecological differences, which are not sufficient criteria for 

 recognizing species. It is obviously a _C. tesselatus clone, with its 

 own particular ecological requirennents and evolutionary history, and 

 differing no more from other clones of that species than they do from 

 each other. I believe that _C. dixoni should be, and will do so formal- 

 ly in a future paper, relegated to the synonymy of _C. tesselatus . 



It is apparent that each species, sexual or parthenogenetic, has 

 its own particular set of ecological requirements and, given historical 

 factors, will occur wherever these requirements are satisfied. These 

 .requirements are not yet fully understood and appear to lead to a be- 

 wildering array of discontinuous, overlapping species aissemblages. It 

 is also apparent that at least some parthenospecies have had multiple 

 origins but that not every hybridization event has generated a success- 

 ful parthenogenetic population because aberrant individuals represent- 

 ing probable hybrids are collected regularly. The cytogenetic criteria 

 necessary for parthenogenetic reproduction are not understood. The 

 ecological conditions required for parthenogenetic populations to suc- 

 ceed are beginning to be investigated; this bibliography provides a 

 body of uncorrected data and opinion on that subject. The species of 

 Cnemidophorus in New Mexico provide a rich, fertile ground for the 

 study of many biological phenomena. I believe that the species them- 

 selves and their interactions can be utilized as excellent indices of 

 present habitat type, condition and environmental quality, and that of 

 the historically recent past. Much interesting and potentially signi- 

 ficant field work remains undone. 



The following index is a numerical listing of the annotations by 

 species. Parthenospecies are designated (P). A citation number is 

 placed after a particular subspecies name when it is known definitive- 

 ly that that subspecies is referred to; otherwise the number is placed 

 after the general species name. Correct species names are placed in 

 parentheses in the text following names that are no longer in use or 

 that are incorrectly applied. The bibliography is not exhaustive; I 

 have omitted such as the popular Field Guides which are readily avail- 

 able to everyone, and works of a purely taxonomic nature which are 

 either useless or not pertinent to the scope of this work. The bib- 

 liography is nevertheless complete; it represents the sum total of the 

 knowledge on the species of Cnemidophorus that occur in New Mexico. 



ACKNOWLEDGEMENTS 



I wish to thank Holly Reynolds and the Interlibrary Loan Staff at 

 New Mexico State University for graciously tracking down obscure and/or 

 hard-to-get papers. Dr. C. 3. McCoy of the Carnegie Museum of Natural 



