Taylor, E. H.
1955. Additions to the known herpetological fauna of Costa Rica with comments on other species. No. II. Univ. Kansas Sci. Bull., 37:299-575. October 15.
Taylor, E. H. and Smith, H. M.
1939. Miscellaneous notes on Mexican snakes. Univ. Kansas Sci. Bull., 25:239-258. July 10.
Wettstein, O.
1934. Ergibnisse der osterreichischen biologischen Costa Rica—Expedition 1930. Die Amphibia und Reptilien. Stiz. Akad. Wiss. Wien, mathem-naturw. kl., Abt. 1, bd. 143:1-39.
Transmitted November 30, 1962.
29-5936