MEXICAN AMPHIBIANS—TAYLOR AND SMITH 563 
specimens are from Cuautlapan (January to February, 1940), and a 
topotypic specimen is from Agua del Obispo, Guerrero, August 31, 
1939. 
The Potrero specimens (U.S.N.M. Nos. 115446-115458) seem to 
agree very well with the type from Guerrero. The dark markings on 
the occiput are more clearly a pair of stripes which begin on the inner 
edge of the orbits and tend to meet shortly on the median line, forming 
a V. In certain topotypic specimens this may be represented by a 
black spot. A few other differences may be due to preservation. The 
dorsal coloration is usually nearly uniform, varying from clay to hight 
brown in different specimens. A hair-fine median dorsal line is present 
or indicated in most of the specimens. The sides are variegated, 
darker than the back. The dorsal coloration is frequently limited by a 
black, discontinuous line. The inguinal gland is larger than that in 
pygmaeus, which occurs in the same locality. 
The two specimens from Cuautlapan (U.S.N.M. Nos. 115459- 
115460) show the ridges, folds, and tubercles rather strongly, prob- 
ably due to having been preserved in formalin. U.S.N.M. No. 
115446, from Agua del Obispo, Guerrero, is a topotype. 
MICROBATRACHYLUS ALBOLABRIS Taylor 
Microbatrachylus albolabris TAyLor, Univ. Kansas Sci. Bull., vol. 26, No. 15, 1939 
(Nov. 27, 1940g, first mailing), pp. 502-504, pl. 56, figs. A, B (2 miles west of 
Cérdoba, Veracruz). 
The collection contains 18 specimens from Potrero Viejo (December 
- 14-21, 1938), and Cuautlapan, Veracruz (January to February 1940); 
La Esperanza, Colonia Hidalgo, and Salto de Agua (Mount Ovando) 
(April 11-18, 1940), Chiapas. 
The southern specimens differ somewhat from the northern ones 
but perhaps no more than the northern specimens differ among them- 
selves, except that the digital disks of fingers and toes are very slightly 
narrower. The present known distribution includes southern Vera- 
cruz, southern Guerrero, and southern Chiapas. They occur usually 
in low mountains or foothills. The specimen from Salto de Agua is 
from an elevation of 1,200 feet, those from Cuautlapan from about 
2,500 feet. 
Potrero Viejo: U.S.N.M. Nos. 115462-115466. These are pre- 
served in weak alcohol and have absorbed too much liquid. They 
have in consequence an overstuffed appearance and the tubercles and 
ridges are nearly obsolete. In spite of having been collected in the 
daytime, the specimens are very light colored. 
Cuautlapan: U.S.N.M. Nos. 115467-115476. These were taken in 
daytime also and preserved in formalin; in consequence, the ridges 
and tubercles stand out very strongly. They are darker but the 
essential pattern is evident, and several have the median hair-fine line 
and the trifoliate or quadrifoliate light mark on the head. 
