Syrrhophus modestus modestus Taylor
Syrrhophus modestus Taylor, Univ. Kansas Sci. Bull., 28:304, May 15, 1942.—Hacienda Paso del Río, Colima, México.
Syrrhophus modestus modestus, Duellman, Occ. Pap. Mus. Zool. Univ. Michigan, 594:5, June 6, 1958.
This small terrestrial frog is not uncommon on the coastal lowlands and foothills in Nayarit and in Colima, where it has been collected within a few kilometers of the Michoacán border. At Tecolapa, Colima, on August 9, 1956, Syrrhophus modestus modestus was found with Tomodactylus nitidus orarius, Bufo marinus, Bufo marmoreus, Hyla baudini, Hyla smithi, and Phyllomedusa dacnicolor, all of which occur on the coastal lowlands of Michoacán. Because of its solitary and secretive habits, Syrrhophus modestus modestus is not common in collections. Additional field work on the coast of Michoacán should reveal the presence of the species there.
Hyla microcephala sartori Smith
Hyla microcephala sartori Smith, Herpetologica, 7:186, December 31, 1951.—1 mi. N of Organos, S of El Triente, Guerrero, México.
On August 28, 1960, J. R. Dixon obtained a series of this species from a temporary pond 6 kilometers northeast of La Resolana, Jalisco. Previously, Hyla microcephala sartori had been known only from the lowlands of Guerrero and Oaxaca. The existence of the species in Jalisco provides evidence that this frog also occurs in Michoacán and Colima.
Gastrophryne usta usta (Cope)
Engystoma ustum Cope, Proc. Acad. Nat. Sci. Philadelphia, 18:131, 1866.—Guadalajara, Jalisco, México.
Gastrophryne usta usta, Carvalho, Occ. Pap. Mus. Zool. Univ. Michigan, 555:13, July 16, 1954.