the anal stripe extends laterally in the form of a row of
cream-colored dashes and spots onto the posterodorsal surfaces of the
thighs.

_Remarks._--On the basis of the four specimens available for study,
_Hyla pachyderma_ seems to be closely related to _Hyla crassa_ and
_Hyla robertsorum_. In the _Hyla bistincta_ group, _Hyla pachyderma_
is unique in having enlarged nuptial spines.

Taylor and Smith (1945:588) stated that the frogs were found on
bushes and weeds beside a small, bounding stream near Pan de Olla.
I have searched unsuccessfully for this species in the area around
Pan de Olla and Tezuitlan.

_Distribution._--This species is known only from a stream at an
elevation of about 1600 meters on the Atlantic slopes of the Sierra
Madre Oriental in central Veracruz (Fig. 4).

Specimens examined.--VERACRUZ: Pan de Olla, south of Tezuitlan,
Puebla, USNM 115026-9.

#Hyla crassa# (Brocchi)

_Cauphias crassus_ Brocchi, Bull. Soc. Philom. Paris, ser. 7,
1:130, 1877 [Holotype.--MNHN 6331 from "Mexico;" Adolphe
Boucard collector].

_Cauphias crassum_ Brocchi, Etudes des batraciens de
l'Amerique Centrale, p. 64, pl. 12, fig. 4, 1882. Diaz de
Leon, Indice de los batracios que se encuentran en la
Republica Mexicana, p. 21, June, 1904. Kellogg, Bull. U. S.
Nat. Mus., 160:118-120, March 31, 1932. Taylor, Univ. Kansas
Sci. Bull., 26:392, November 15, 1940. Rabb and Mosimann,
Occas. Papers Mus. Zool. Univ. Michigan, 563:7, March 29,
1955.

_Hyla crassa_, Boulenger, Catalogue Batrachia Salientia,
2nd. Ed., p. 396, February 1, 1882. Guenther, Biologia
Centrali-Americana, Reptilia and Batrachia, p. 281,
September, 1901. Nieden, Das Tierreich, Amphibia, Anura 1,
p. 248, June, 1923. Smith and Taylor, Bull. U. S. Natl. Mus.,
194:86, June 17, 1948. Taylor, Amer. Mus. Novitates, 1437:20,
December 7, 1949.

_Hypsiboas crassus_, Cope, Bull. U. S. Natl. Mus., 32:14,
1887.

_Hyla robustofemora_ Taylor, Univ. Kansas Sci. Bull.,
26:389-393, figs. 3-4, November 27, 1940 [Holotype.--UIMNH
25050 (formerly EHT-HMS 16314) from Cerro San Felipe, 15
kilometers northeast of Oaxaca, Oaxaca, Mexico; Edward H.
Taylor collector]; Univ. Kansas Sci. Bull., 28:310, November
15, 1942. Smith and Taylor, Bull. U. S. Natl. Mus., 194:86,
June 17, 1948. Taylor, Amer. Mus. Novitates, 1437:20,
December 7, 1949. Smith and Taylor, Univ. K