190 University of California Publications in Zoology [Vol. 27 
Cope (1879, p. 437), in the description of his Bufo dipternus, gives 
the locality of capture of the type as “ plains north of the Missouri 
River east of Fort Benton” [= Montana]. If this material is prop- 
erly referable to cognatus then the range of the latter is carried nearly 
to the Canadian boundary. The same author (Cope, 1889, p. 277) 
states that he obtained additional specimens near the Judith River, 
which empties into the Missouri about fifty miles east of Fort Benton. 
Cary (1917, p. 27) lists this species from the Upper Sonoran Zone in 
Wyoming, without locality. It is said to occur in the Dakotas, but I 
can find no definite records. In Nebraska the species has been found 
at Fort Kearney and ‘ ‘ Fort Pierre, ’ ’ in Kansas at Fort Riley, and in 
Arkansas on the Red River and “Pale Creek” (Yarrow, 1883, p. 165). 
In Colorado, Ellis and Henderson (1913, p. 56) say that it is a 
‘ ‘ plains species, coming into the foothills region. ’ ’ According to their 
records it skirts the eastern base of the Rockies from Julesburg and 
Greeley on the north to Costello County at the south. It has been 
found at Fort Garland (Yarrow, 1875, p. 521). Dickerson (1906, 
pi. 32 [figs. 90, 92]) indicates Denver as a locality of record; the 
color pattern of the specimens shown in the figures is different from 
that of cognatus to the south and west. In Texas this species occupies 
only the extreme western part, in the ‘ ‘ Panhandle ’ ’ district, as on the 
headwaters of the Brazos River (Cope, 1892, p. 332), at Goodnight, 
Armstrong County, about El Paso (Strecker, 1915, p. 52), and at 
Sierra Blanca, El Paso County (Bradley, 1919, p. 413). 
In New Mexico this species has been recorded at Albuquerque 
(Van Denburgh, 1924, p. 196). The same author mentions a specimen 
in the U. S. National Museum from near Monument 66 on the Mexican 
boundary. Camp (1915, p. 333) lists a specimen from the same col- 
lection (no. 21065) with the following data: “Animas Valley (Colo- 
rado?) September 9, 1895?” Accompanying this is a toad of the 
same species (no*. 21070) from Fort Huachucha, Arizona, taken in 
July, 1893. A study of the diary of Major E. A. Mearns (1907, 
pp. 14, 15, 92) convinces me that the Monument 66 and Animas Valley 
records are based on one specimen and that the animal in question 
was collected by Mearns on the eastern margin of Las Animas Valley, 
Grant County, New Mexico, on September 9, 1893. Mearns was at 
Fort Huachucha, Arizona, July 17 to 27, 1893. The record given by 
Yarrow (1875, p. 521) and repeated by Cope (1889, p. 267) for “Ral- 
ston, Ariz. ’ ’ probably relates to a place of this name in extreme south- 
western New Mexico, in the vicinity of the present town of Lordsburg. 
