Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
R. Zweifel
1953
Pituophis catenifer
Rio Nazas at San Salvador, Durango, Mexico
2304 RZ
July 6
Large adult. General all over color is yellow-
Brown. blotches are yellow-olive anteriorly,
becoming brown on the tail.
13 mi. N Mazatlan, to Sinaloa, Mexico
2543 RZ
July 16
Fresh DOR in the evening. Thorn Forest.