Haw PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 95 
from Cayenne (French Guiana). This may be presumed to be the 
type locality for this species. 
A second difficulty is that seldom are good series of these great 
toads collected; and the age, sex, and environmental variations are 
known for only a few localities. 
_ Wiegmann described Bufo horribilis from a series of cotypes from 
the state of Veracruz, and we are reviving this designation for most 
of the toads of this group in México aware that there are probably 
variant populations even here, that may warrant subspecific desig- 
nations. 
A total of 27 specimens was collected, of which the following are cata- 
loged: Micuoacdn: U.S.N.M. No. 116512, 4 km. north of Apatzin- 
odin, March 18, 1939. Morrnos: U.S.N.M. No. 116517, Puente de 
Ixtla, April25,1940. Oaxaca: U.S.N.M. Nos. 116536-116537, Tehuan- 
tepec, January 1, 1940. Tapasco: U.S.N.M. No. 116523, Teno- 
sique, June 30, 1939. Cuiapas: U.S.N.M. Nos. 116514—-116516, 
Cruz de Piedra, April 25, 1940; U.S.N.M. Nos. 116518-116522, San 
Juanito, July 7-19, 1939. GuaTmmata: U.S.N.M. Nos. 116524— 
116535, Piedras Negras, May 21 to June 22, 1939. 
It is possible that more than a single race of this toad isrepresented, 
although some of the differences are probably due to age and sex. 
The most significant differences are in U.S.N.M. No. 116514, a half- 
grown (110 mm.) specimen from Cruz de Piedra, near Acacoyagua, 
Chiapas. In this the cranial crests are very low (or perhaps the inter- 
orbital region is elevated to near the level of the crest). The interor- 
bital and postorbital crests form continuous curves. No occipital 
crest; the profile of the snout is curving to the top of head, and is not 
truncate; the parotoid glands are rather small, and colored like the 
body. The specimen is a male and the skin is very rough; two other 
specimens from this locality are juveniles. However, specimens in 
the E. H. Taylor-H. M. Smith collection from Chiapas show these 
same unusual head structures. 
The Michoacdén specimen is very large (189 mm. snout to vent). 
The rusty-brown parotoid glands are extremely large, triangular, the 
apex pointing backward. Their greatest length is 48 mm., their width, 
measured on the curve, 44 mm. The specimen is a male, and the skin 
is very rough. The snout is sharply truncate, the ridges high and 
covered with black horn. The interorbital crests are rather angular, 
and an occipital crest is indicated. 
It is of interest to record here four specimens added to the National 
Museum collections since the publication of Kelloge’s summary (19382, 
p. 57): U.S.N.M. No. 84398, Veracruz, Veracruz; U.S.N.M. No. 
84414, Motzorongo, Veracruz; U.S.N.M. No. 84416, Tetecala, 
Morelos; and U.S.N.M. No. 84418, ‘‘Chiapas.”’ 
