Paul De Benedictis 1960 Sept 5 Chiropterotriton chiropetra Kilometer 75, Highway 196 - WW slope Mt. Popocatepetl, Mexico, Mex. (T. Papenfuss, M.A. Eudey collectors) - # 102. Snout-vent: 1 3/4". Tail broken, but present]. Dorsal ground very dark brown, sides da[illegible], venter pale grayish; No pattern, crossed out lateral dark color sharply defined Animal dead. under a microscope the coloration actually consists of a matting of bronzy specks on a black ground, the bronny disappearing laterally. Towards the belly the black resolves into separate black specks, on a whitish ground. # 103. Snout-vent - 1 3/8", tail broken. A brown dorsal band from back of head to tip of tail, dors laterally black, mottled with stripe color, Head darker above than body. Limbs stripe color above, black laterally, beneath gray, with coarse lighter specks on chin and throat. Basic pigmentation as above, but more clustered bronzy pigment dorsally, and very little on sides. chest color gular and posterior abdomen[illegible] The general aspect of these animals is that of Batrachoseps (but with a caudal constriction)