Leptodeira frenata malleisi
Dunn & Stuart 1935
Yucatán, Mexico. June 27, 2016.
This little viper mimic is certainly Leptodeira frenata, but the subspecific designation is a little shaky. Purportedly, L. f. malleisi features orange or brown saddles on a brown background, with a dark outline bordering the saddles. This snake was found on the road at night in the southeastern portion of Yucatán state. See also the lifelist entry for Leptodeira frenata yucatanensis.
My Flickr album for Yucatán 2016 is here.
HerpMapper records for this species are here.