. Breviora. 1973 COLOR PATTERN OF SONORA. Figure 2. Neotype of Sonora michoacanensis micfioacanensis, BMNH 1946. though this paper emphasizes color pattern, I have summarized meristic data for all known specimens (Tables 1 and 2) so that these data will be available to others. Counts of ventral scales were made according to the method of Dowling (1951) and do not include the anal scale. Counts of subcaudal scales exclude the tip. For these reasons, data given here may differ slightly from those presented by Stickel (1943: 114-115). Where means are given for scale counts they are based
. Breviora. 1973 COLOR PATTERN OF SONORA. Figure 2. Neotype of Sonora michoacanensis micfioacanensis, BMNH 1946. though this paper emphasizes color pattern, I have summarized meristic data for all known specimens (Tables 1 and 2) so that these data will be available to others. Counts of ventral scales were made according to the method of Dowling (1951) and do not include the anal scale. Counts of subcaudal scales exclude the tip. For these reasons, data given here may differ slightly from those presented by Stickel (1943: 114-115). Where means are given for scale counts they are based only upon specimens that I was able to examine myself. The color de- scriptions are based on preserved specimens unless stated otherwise. Acknowledgements. William E. Duellman, Richard D. Estes, Ernest E. Williams and Richard G. Zweifel have all read the manuscript in its formative stages and I am grateful for their thoughtful criticism. The research was funded in part by a grant from the Boston University Graduate School (GRS BI- .15-BIO). I am indebted to the following individuals and institutions for the loan of specimens: William E. Duellman (University of Kansas Museum of Natural History, KU), Her- bert S. Harris (Personal Collection, RS-HSH), Hymen Marx (Field Museum of Natural History, FMNH), Hobart M. Smith and'Dorothy Smith (University of Illinois Museum of Natural History, UIMNH), David B. Wake (Museum of Vertebrate Zoology, MVZ), Charles F. Walker and Scott M. Moody (Uni- versity of Michigan Museum of Zoology, UMMZ), Ernest E. Williams (Museum of Comparative Zoology, MCZ) and Richard G. Zweifel (American Museum of Natural History, AMNH). Herbert S. Harris kindly provided a color slide of a living snake, and A. F. Stimson was instrumental in obtaining data. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original
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