Microbatrachylus albolabris_, _imitator_, _minimus_, and
_pygmaeus_ are morphotypes of one species. Of these names, _pygmaeus_ is
the oldest. Consequently _Microbatrachylus pygmaeus_ has been used here
for the series from Arteaga.

Although _Microbatrachylus hobartsmithi_, a species distinguished from
all of the above by the presence of tubercles on the outer edge of the
tarsus, is known from Michoacan northward into Nayarit,
_Microbatrachylus pygmaeus_ previously has not been known north of
Guerrero, where it occurs in habitats similar to that in which it was
collected at Arteaga.

~Eleutherodactylus augusti cactorum~ Taylor

_Eleutherodactylus cactorum_ Taylor, Univ. Kansas Sci. Bull.,
25:391, July 10, 1939.--20 miles northwest of Tehuacan,
Puebla, Mexico.

_Eleutherodactylus augusti cactorum_, Zweifel, Amer. Mus.
Novitates, 1813:20, December 23, 1956.

Cheran; Coalcoman; Uruapan.

The few specimens indicate that this species occurs at moderate to high
elevations in the state. The specimens from Cheran and Uruapan were
obtained in pine forests; the specimen from Coalcoman was found on a
rocky hillside covered with dense forest and located about 100 meters
below the lower limits of the pine forest in the area. A specimen from
Rancho Reparto (elevation 1850 meters) on the west slope of Cerro
Barolosa was lost.

The specimen from Coalcoman (UMMZ 104728) is a juvenile having a
snout-vent length of 25.0 mm. In life it was tan above, mottled with
olive-green. The ventral surfaces were gray; the hind limbs were
distinctly barred with yellow and brown, and the lips were barred with
yellow and black.

~Eleutherodactylus occidentalis~ Taylor

_Eleutherodactylus occidentalis_ Taylor, Proc. Biol. Soc.
Washington, 54:91, July 31, 1941.--Hacienda El Florencio,
Zacatecas, Mexico.

Arteaga (2); Cascada Tzararacua; Coalcoman (2); 19 km. SW of
Coire (3); La Placita (7); Los Reyes; Ostula (4); Pomaro
(2).

The locality records for this species suggest that it is a member of a
group of animals, the distribution of which includes the western part of
the Mexican Plateau and the Pacific lowlands. In Michoacan this frog
has been collected in pine-oak forest at Cascada Tzararacua and at Los
Reyes, in arid scrub forest at Arteaga and Coalcoman, and in tropical
semi-deciduous forest on the lower Pacific slopes of the Sierra de
Coalcoman. On July 5, 1950, James Peter