14 BULLETIN 160, UNITED STATES NATIONAL MUSEUM 



rhinus Boulenger. Forrer collected also the type of Rana pustulosa 

 Boulenger at Ventanas in Durango. In 1888 George F. Gaumer 

 worked in Yucatan and visited Cozumel, Ruatan, and the Bonacca 

 Islands. 



The cotypes of Eleutherodactylus alfredi (Boulenger), which were 

 presented by Alfred Duges, came from Atoyac in Vera Cruz. Dr. 

 Hans Gadow and his wife on one of their visits to Mexico collected 

 the cotypes of Eupemphix gadovii Boulenger at San Mateo del Mar 

 near Tehuantepec, and those of Eleutherodactylus beatae (Boulenger) 

 at La Perla near Orizaba. The cotypes of Rana tarahumarae from 

 the Sierra Tarahumari formed part of a collection acquired from 

 Doctor Gadow. 



So far as known only one of the Mexican types — Bufo lateralis~is 

 located in the Naturhistorische Museum at Vienna, and that was 

 described by Dr. Franz Werner from a toad collected in Tehuantepec 

 in 1872 by T. K. Salmon. A number of Mexican amphibians collected 

 by Dr. Hans Gadow are in the Vienna museum. 



The type of the Mexican toad Bufo occipitalis, which was de- 

 scribed by Prof. Lorenzo Camerano in 1879, should be in the museum 

 at Turin, Italy, but it could not be found at the time of the writer's 

 visit there in 1930. The type of Hylodes augusti remained in the 

 possession of Dr. Alfred Duges at Guanajuato, Mexico, and its present 

 whereabouts are unknown. 



The tailless amphibians of Mexico are not known to be less abun- 

 dant than those found within the borders of the United States, and 

 yet some of these species are very meagerly represented in American 

 collections. For some of the species only a single individual was 

 available, and in one or two instances the species is known to the 

 writer solely from the diagnosis published by the original describer. 

 Practically all the types of species desciibed by Baird, Barbour, Bo- 

 court, Boulenger, Brocchi, Cope, Giinther, Mooquard, Peters, Werner, 

 and Wiegmann have been studied by the writer. The majority of the 

 specimens examined have been preserved in alcohol from 30 to 100 

 years, and the vicissitudes of time, including evaporation and action 

 of the preservatives, as well as the bleaching effect of light, have 

 hindered and in some instances prevented critical comparisons. 

 Among the many published reports that deal with or refer to Mexican 

 amphibians, there are a number of such a general nature that no 

 reference is made to them in the text. Shorter articles and particu- 

 larly those containing either descriptions of new species or supplemen- 

 tal data on those already described are cited in the synonymy. 



