MEXICAN AMPHIBIANS—TAYLOR AND SMITH 559 
BUFO CRISTATUS Wiegmann 
PLaTE 23, Figures 5, 6 
Bufo cristatus W1EGMANN, Isis von Oken, vol. 26, pt. 7, 1833, pp. 660-661 
(Jalapa, Veracruz). 
The following specimens, 30 in number, were collected: VERACRUZ: 
Cuautlapan, January 1-16 and September 25, 1938, and January to 
February, 1940 (U.S.N.M. Nos. 116545-116558) ; San José de Gracia 
September 26, 1940 (U.S.N.M. No. 116559); Potrero Viejo, Decem- 
ber 13, 1938 and June 17, 19389 (U.S.N.M. Nos. 116990-116992). 
Cuiapas: Cruz de Piedra, April 25 to May 15, 1940 (U.S.N.M. Nos. 
116994-117003); Salto de Agua, May 19, 1940 (U.S.N.M. No. 
117004) ; Colonia Soconusco, May 23, 1940 (U.S.N.M. No. 117005). 
The species is not at all rare in the region about Cuautlapan. 
Specimens weve taken (August 19) in the village street and in a pool 
a few hundred yards south of town and at an elevation about 300 
feet higher. Bufo horribilis, Bufo valliceps, Agalychnis moreletw, Hyla 
rickardsi, Hyla staufferi, Hyla baudinii, Hylella picta, and Microhyla 
usta were taken in the same pool (Taylor). Clasping pairs of 
cristatus were taken but no eggs were found. 
The color of the males is variable above, some dark olive to greenish 
yellow with dark markings, occasionally reddish brown; parotoids 
the same color as the body; chin yellowish with a bluish or blackish 
area on the vocal sac; venter dirty flesh to white, with olive reticula- 
tions on the breast and anterior part of abdomen; occasionally a 
wash of yellow over the ventral surfaces; upper lip cream. 
Females often show indefinite patterns above with dark spots 
along the sides of the median line. Two are very dark above so that 
the dark spots are seen with difficulty. 
The young are of two types; one very dark above, with the chin, 
throat, and abdomen also dark. The underside of the thigh is lighter 
flesh. The ventral tubercles are tipped with yellow, and there are 
a few tiny yellow spots on the back part of the abdomen. The others 
are lighter, uniform or variegated brown, light gray or brownish gray. 
An interorbital bar and a few more or less symmetrically placed 
spots of dark (the largest usually on the rump) are present. These 
are usually yellow below, with dark reticulation. 
The two largest specimens measure 90 mm. from snout to vent. 
One is light variegated brownish olive above, the other is nearly 
black. Both are females. 
BUFO VALLICEPS Wiegmann 
PuatE 24, Figures 1-6 
Bufo valliceps WreGMANN, Isis von Oken, vol. 26, pt. 7, 1833, pp. 657-659 
(México). 
Highty-four specimens were secured; the following are cataloged in 
the Museum collection: Cutapas: U.S.N.M. Nos. 116960-116965, 
