re of 21 males and four females, respectively:
snout-vent length, 43.5-51.7 (48.1), 55.6-62.6 (59.1); tibia length,
16.6-18.8 (17.6), 18.8-20.3 (19.3); head width, 16.7-19.7 (18.4),
20.6-22.2 (21.4); head length, 13.8-16.6 (14.8), 16.5-18.2 (17.3).

The specimens from the Tepalcatepec Valley differ slightly from
specimens from southeastern Mexico and Central America. Those from
Michoacan have low and narrow cranial crests; in about one-half of the
specimens the occipital crest exists only as a row of tubercles, and in
some the postorbital and suborbital crests are barely discernible.
Specimens from the southern part of the range, Costa Rica and Nicaragua,
have much higher and thicker cranial crests; in these the occipital
crest is well defined and extends posteriorly to a point back of the
anterior edge of the parotid gland; the postorbital and suborbital
crests are well marked. Of 48 specimens from Esquipulas, Guatemala, all
have high crests, but these are not so well developed as in ten
specimens from Matagalpa, Nicaragua, and three from various localities
in Costa Rica. Six specimens from Tehuantepec, Oaxaca, have cranial
crests that are lower than those in specimens from Guatemala. In three
of the specimens from Tehuantepec the occipital crests are reduced to a
series of tubercles. Of six specimens from Agua del Obispo, Guerrero,
four have poorly developed occipital crests. These observations suggest
the presence of a cline in the development of the cranial crests;
specimens have higher crests in the southern part of the range than in
the northern part.

In Mexico _Bufo coccifer_ has been collected only in semi-xeric
habitats, but to the south, from Guatemala to Costa Rica, it has been
found in more upland and humid habitats. Southern specimens are darker
than those from the north, a possible correlation with the differences
in habitat.

These toads probably range throughout the Tepalcatepec Valley, but they
are unknown from the coast of Michoacan. Breeding choruses were found
after heavy rains on June 24, 1955, and on August 2, 1956. The first was
in a muddy ditch; the second was in a flooded grassy field. The call is
a high-pitched, but not loud, "whirrr." Males were calling from the edge
of the water or from clumps of grass in the water. Clasping pairs were
in the water; amplexus is axillary.

~Bufo compactilis compactilis~ Wiegmann

_Bufo compactilis_ Wiegmann, Isis von Oken, 26:661,
1833.--Mex