A single male having 136 ventrals, 75 caudals, and a total length of 407 mm. was found by a stream in camp. The dorsum is pale grayish tan with 34 pairs of small chocolate brown spots, some of the anterior ones of which are connected across the back. A cream-colored lateral stripe is on the third and fourth dorsal scale-rows anteriorly and the second and third rows posteriorly. The lower dorsal scale rows are black. The venter is dark grayish brown with cream-colored flecks anteriorly and creamy gray posteriorly where the dark color is restricted to the midventral region and the lateral edges of ventrals and first dorsal scale-row.
Xenodon rabdocephalus mexicanus Smith
Chinajá, 1; 20 km. NNW of Chinajá, 1.
Both individuals were found on the forest floor. An adult male having a total length of 420 mm. has a cream-colored venter with brown flecks. A juvenile having a total length of 172 mm. has a creamy white belly with black crossbands.
At the suggestion of L. C. Stuart, I am following Schmidt (1941:501) in placing X. mexicanus as a subspecies of X. rabdocephalus.
Micrurus affinis apiatus (Jan)
20 km. NNW of Chinajá, 2; Sayaxché, 1.
All specimens were found beneath litter on the forest floor. All are males having 202 to 211 (average 205) ventrals, 53 to 56 (54.6) caudals, and 34 to 48 (41) primary black rings on the body. There are no yellow rings, and black spots in the red interspaces tend to form secondary black rings (Fig. 6b), the same as in Pliocercus euryzonus aequalis. The local name is coral or coralillo.
Bothrops atrox asper (Garman)