1. Snakes of Kansas;BRANSON;Kansas University Science Bulletin,1904
2. A review of the genera and species of American snakes, north of Mexico;BROWN;Proceedings of the Academy of Natural Sciences, Philadelphia,1901
3. An erythristic Thamnophissirtalissirtalis;CARPENTER;Herpetologica,1948
4. COPE , E. D. 1900 The crocodilians, lizards, and snakes of North America Report of the United States National Museum for 1898 153 1270