. Bulletin - United States National Museum. Science. 148 BULLETIN 17 5, UNITED STATES NATIONAL MUSEUM The sexual variation observable in this form may be summarized as follows: Dorsal scale formula varies from 27-29-21 to 31-35-25 in males, from 27-29-21 to 31-37-27 in females; ventrals 206 to 231 4 3 20 26 96 36 20 16 9 7 15 14 1 13 .1 i *\ kW k^ 12 T N y-»-( "^ ^ V 1 > 1 11 "\ 10 Region No. 4 8 9 10 Figure 68.—Geographic variation in number of infralabials in Pituophis catenifer Region No. 1 2 5 4 6 6 7 8 9 10 Figure 69.—Geographic variation
. Bulletin - United States National Museum. Science. 148 BULLETIN 17 5, UNITED STATES NATIONAL MUSEUM The sexual variation observable in this form may be summarized as follows: Dorsal scale formula varies from 27-29-21 to 31-35-25 in males, from 27-29-21 to 31-37-27 in females; ventrals 206 to 231 4 3 20 26 96 36 20 16 9 7 15 14 1 13 .1 i *\ kW k^ 12 T N y-»-( "^ ^ V 1 > 1 11 "\ 10 Region No. 4 8 9 10 Figure 68.—Geographic variation in number of infralabials in Pituophis catenifer Region No. 1 2 5 4 6 6 7 8 9 10 Figure 69.—Geographic variation in ratio of tail length to total length in Pituophis catenifer catenifer. (average ) in males, 207 to 234 (average ) in females; caudals 56 to 80 (average ) in males, 54 to 75 (average ) in females; supralabials, infralabials, preoculars, and postoculars all average slightly higher in females than in males; dorsal body spots. 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 United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.
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