ingan have the following measurements:
snout-vent length, 22.8-26.0 (25.0) mm., tibia length, 10.7-13.6 (12.6)
mm.; head width, 7.2-8.0 (7.6) mm., head length, 7.1-8.1 (7.7) mm.

~Hypopachus caprimimus~ Taylor

_Hypopachus caprimimus_ Taylor, Univ. Kansas Sci. Bull.,
26:526, November 27, 1940.--Agua del Obispo, Guerrero,
Mexico.

Buena Vista; Copuyo (6); Charapendo (3); Cofradia;
Jaramillo; Jungapeo; San Salvador; Tuxpan.

Specimens of _Hypopachus_ from the Balsas drainage in Michoacan have
characters consistent with topotypic _H. caprimimus_. Eleven specimens
from the southern edge of the Mexican Plateau all have the flanks darker
than the dorsum, a distinct and continuous dark stripe from the occiput
to the groin, a large dark spot in the inguinal region, and a pair of
dark transverse stripes on the thigh and shank (Pl. 6, Fig. 1). With
the exception of three specimens from Charapendo, all have a
predominantly brown venter with round, cream-colored spots.

Peters (1954:8) referred specimens from Buena Vista and San Salvador to
_Hypopachus oxyrrhinus_. He stated that the specimen (BMNH
1914.1.28.150) from San Salvador had flanks much darker than the dorsum
and a well-defined continuous stripe from the occiput to the groin; this
specimen has the characters of _H. caprimimus_. The specimen (BMNH
1914.1.28.151) from Buena Vista resembles _H. oxyrrhinus_ in some
characters, but it is not like _H. oxyrrhinus ovis_ on the Mexican
Plateau in Michoacan. The specimen has paired transverse stripes on the
hind limbs as does _H. caprimimus_, and is here referred to that
species.

In Michoacan this species has been collected in arid tropical scrub
forest at elevations of 200 to 1800 meters in the northern foothills of
the Sierra de Coalcoman, the Tepalcatepec and Tuxpan valleys, and on the
lower slopes of the Cordillera Volcanica. Calling males have been found
along streams. One specimen from Charapendo was regurgitated by a
_Leptodeira maculata_.

~Hypopachus oxyrrhinus ovis~ Taylor

_Hypopachus ovis_ Taylor, Univ. Kansas Sci. Bull., 26:520,
November 27, 1940.--Tepic, Nayarit, Mexico.

_Hypopachus oxyrrhinus ovis_, Shannon and Humphrey,
Herpetologica, 14:89, July 23, 1958.

Emiliano Zapata; 30 km. NW of Jacona (2); 10 km. NE of
Patzcuaro (2); Tangamandapio (16); 24 km. W of Zamora (16).

Thirty-seven specimens from the Mexican Plateau in northwestern
Michoac