Abstract
SEVERAL years ago Dr. Frank N. Blanchard observed that certain color differences exist between eastern and western specimens of Farancia abacura, but because of other research projects which then occupied his attention, he was unable to study the Farancia problem in detail. He did, however discuss it with his colleague and former student, Dr. Howard K. Gloyd. After Dr. Blanchard's death, this was one of the unfinished problems turned over to Dr. Gloyd, at whose suggestion I have undertaken a study of the variation occurring in the genus. A study of 219 specimens has led to the conclusion that two readily definable subspecies exist in F. abacura. Most of these specimens have been examined by myself; part were examined by Dr. Blanchard and Dr. Gloyd, and the data secured by them have been used wherever possible. I wish to thank the owners or authorities 2 in charge of these specimens for numerous courtesies facilitating this study which were extended to Dr. Blanchard, Dr. Gloyd and to me, and in particular to express my gratitude for invaluable assistance kindly afforded by Dr. Gloyd, Walter Necker, Karl P. Schmidt, and Dr. Leonhard Stejneger.
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