Mouth of the Río Balsas (10).
These specimens (BMNH 1914.1.28.181-90) were collected by Gadow in 1908 and reported by him (1930:72): "Whilst this very sluggish termite-eating toad is common enough in the sweltering hot country of the state of Vera Cruz, up to an elevation of 1500 feet, it was unknown on the west side of the Isthmus until I found it in great numbers near the mouth of the Balsas River, in and near fresh-water pools, where it attracted attention by its loud peculiar voice during the pairing season in the month of July." Subsequently, Peters (1954:3) verified the identification of these specimens. Although torrential rains fell during the week in July, 1955, that I spent at Playa Azul near the mouth of the Río Balsas, the distinctive voice of Rhinophrynus was not heard. Elsewhere on the Pacific coast of México adult Rhinophrynus have been reported only from Tehuantepec and a few localities on the coastal lowlands of Chiapas. Taylor (1942b:37) found on the coast of Guerrero a tadpole that was referred to the genus Rhinophrynus by Orton (1943). In the summer of 1960 adults of Rhinophrynus were collected near Acapulco, Guerrero (Fouquette, in litt.). These recent collections verify the existence of the species along the Pacific lowlands of México at least as far north as Michoacán.
Scaphiopus hammondi multiplicatus Cope
Scaphiopus multiplicatus Cope, Proc. Acad. Nat. Sci. Philadelphia, 15:52, June 8, 1863.—Valley of México.
Scaphiopus hammondi multiplicatus, Kellogg, Bull. U. S. Natl. Mus., 160:22, March 31, 1932.
Angahuan (5); Cuitzeo (4); Cuseño Station (2); Jiquilpan (9); Morelia (7); Pátzcuaro (3); Quiroga; Tarécuaro; Uruapan (24); Zacapu.
This small toad has been found at elevations between 1500 and 2500 meters on the Mexican Plateau and associated mountain ranges; it occurs in mesquite-grassland and in pine forests. Calling males and females laden with eggs have been collected in the rainy season in the months of July and August. The call is a medium-pitched snore. In living individuals the dorsal ground color varies from pale brown to gray with dark brown or olive-brown markings. In many individuals the tips of the small dorsal pustules are red.
Bufo coccifer Cope
Bufo coccifer Cope, Proc. Acad. Nat. Sci. Philadelphia, 18:130, 1866—Arriba, Costa Rica.
Apatzingán (27); Lombardia; Nueva Italia (5).