The smallest juvenile examined has a snout-vent length of 17.0 mm. and a tail length of 7.5 mm. Twelve juveniles from the vicinity of San Juan de Parangaricutiro have an average snout-vent length of 19.4 mm. and an average tail length of 9.7 mm. In juveniles the adpressed limbs either touch or overlap by one intercostal space; in adults there are two or three intercostal spaces between adpressed toes. Therefore the greatest number of intercostal spaces between adpressed limbs is found in the largest specimens. A similar relationship between adpressed limbs (= length of limbs) and snout-vent length was shown for _Plethodon richmondi_ by Duellman (1954a). The number of vomerine teeth is variable; the number of teeth seems to be closely correlated with the size of the salamander (Fig. 2). A similar correlation between the number of maxillary teeth and body length was reported for _Chiropterotriton multidentatus_ by Rabb (1958). In 12 juvenile _Pseudoeurycea belli_ there are 6-13 (8.8) vomerine teeth, and in 11 adults having snout-vent lengths greater than 90 mm. there are 39-49 (44.0) vomerine teeth. The coloration of the juveniles resembles that of the adults (Pl. 1). [Illustration: FIG. 2. Correlation between the number of vomerine teeth and snout-vent length in 79 _Pseudoeurycea belli_ from Michoacán.] The differences between this species and _Pseudoeurycea gigantea_ are minor. Taylor (1939a) distinguished _gigantea_ from _belli_ by the larger size, fewer intercostal spaces between adpressed limbs, more vomerine teeth, and absence of occipital spots in _gigantea_. Taylor and Smith (1945) stated that in life the spots in _gigantea_ are orange instead of red as in _belli_. Five specimens of _Pseudoeurycea belli_ from Michoacán, including one juvenile, lack occipital spots. In the 34 living individuals that I have seen from Michoacán the spots varied from deep red to orange. Therefore, of the characters listed by Taylor (_op. cit._) to diagnose _Pseudoeurycea gigantea_, only the over-all larger size and smaller number of intercostal spaces between adpressed limbs (= relatively longer limbs) are useful in separating _Pseudoeurycea belli_ and _gigantea_. ~Pseudoeurycea robertsi~ (Taylor) _Oedipus robertsi_ Taylor, Univ. Kansas Sci. Bull., 25:287, July 10, 1939.--Nevado de Toluca, México. _Pseudoeurycea robertsi_ Taylor, Univ. Kansas Sci. Bull., 30:209, June 12, 1944. Atzimba (3); Macho de Agua (9); Puerto Lengua de Vaca (14). Previously this species has been recorded only from the type locality. In July, 1956, individuals referable to this species were found at two sites in pine-fir forest immediately to the east of Macho de Agua and in pine-oak-fir forest at Atzimba. On August 20, 1958, a series was collected in pine-fir forest at Puerto Lengua de Vaca. These localities are between 2900 and 3000 meters in the Cordillera Volcánica in eastern Michoacán.