MEXICAN AMPHIBIANS—TAYLOR AND SMITH 561 
slopes, we suggest that U.S.N.M. Nos. 46948-46949 from Acapo- 
neta, Nayarit, belong to the recently described Bufo mazatlanensis 
Taylor (1940g, pp. 492-492, pl. 53, fig. 1, pl. 54). 
Family LEPTODACTYLIDAE Berg, 1896 
Genus ENGYSTOMOPS Jiménez de la Espada, 1872 
ENGYSTOMOPS PUSTULOSUS (Cope) 
Paludicola pustulosa Corn, Proc. Acad. Nat. Sci. Philadelphia, vol. 16, Aug. 1864, 
p. 180 (New Granada on the River Truando, Colombia). 
Engystomops pustulosus BOULENGER, Catalogue of the Batrachia Salientia s. 
Ecaudata in the collection of the British Museum, ed. 2, 1882, p. 275. 
Seven specimens of this diminutive toadlike species were acquired, 
U.S.N.M. Nos. 116482 and 116483 at Tenosique, Tabasco, June 30, 
1939; U.S.N.M. No. 116486 at Potrero Viejo, Veracruz, July 3, 1939; 
U.S.N.M. Nos. 116484, and 116486-7 at Tehuantepec, Oaxaca, 
January 6 and March, 1940; and U.S.N.M. No. 116485 at Tonalé, 
Chiapas, January 26-30, 1940. 
Specimens we have examined from the more northern localities 
about Potrero and to the east of Jalapa (E.H.T.—H.M.S. collection) 
are a little smaller on the average, but this is due to the larger number 
of males. There are apparently no constant differences worthy of 
nomenclatorial recognition in the various Mexican specimens. We 
have not examined a series from the type locality and it may well be 
that the Mexican form is not identical with that from Colombia. 
Genus LEPTODACTYLUS Fitzinger, 1826 
LEPTODACTYLUS MELANONOTUS (Hallowell) 
Cystignathus melanonotus HALLOWELL, Proc. Acad. Nat. Sci. Philadelphia, vol. 12, 
1860, p. 485 (Nicaragua). 
Leptodactylus melanonotus Broccui1, Mission scientifique ay Mexique et dans 
VY Amérique centrale, Batrachia, 1881, p. 20. 
In all, 317 specimens were collected, from the following localities: 
Curapas: Various localities in the vicinity of La Esperanza (Acacoya- 
gua, Colonia Hidalgo, Colonia Soconusco, Cruz de Piedra, Rancho las 
Gradas) and La Esperanza, April 14 to May 28, 1940 (U.S.N.M. Nos. 
114326-114337; 114845-114390); Tonalé, January 26-30, 1940 
(U.S.N.M. Nos. 1143838-114344). Gurrrero: 5 km. north of Aca- 
pulco, February 9-10, 1939 (U.S.N.M. Nos. 114235-114239); Tierra 
Colorada, February 12-13, 1939, and August 31, 1939 (U.S.N.M. Nos. 
114240-114245); 8 km. east of Coyuca, February 7, 1939 (U.S.N.M. 
Nos. 114232-114234). Micuoackn: 4 km. north of Apatzingan, 
March 14-18, 1939 (U.S.N.M. Nos. 114246-114263). Oaxaca: 
Various localities in the vicinity of Tehuantepec (Cerro Arenal, Cerro 
Guengola, Cerro de Huamelula) and Tehuantepec, January 2—May, 
