THE BATRACHIA OF NORTH AMERICA. 267 



tliiglj,;ui(l auotlier larger one extending almost tbe entire length of the 

 superior edge of the tibia. A prominent round wart directly posterior 

 to the rictus oris, preceded by two or three smaller ones. Inferior sur- 

 faces areolate, most closely posteriorly. 



Fingers short, first and third equal, fourth shortest. Second (first) 

 fiugcr with a very large tubercle at the base of the proximal end of the 

 second phalange 5 a smaller one in the same position on the second. 

 The usual two large palmar tubercles ; distal to which the entire palm 

 is covered with closely placed tubercles. Toes webbed to the extremi- 

 ties, but the web scalloped, so that the edge between the third and 

 fourth toes is opposite the extremity of the first phalange (from meta- 

 tarsal). Sole with a pavement of rather small warts, a single rather 

 larger one below the proximal extremity' of each phalange excepting 

 the distal ones. External metatarsal tubercle large, little defined ; the 

 internal small, oval, and with free coni-cal extremity. Its inner edge is • 

 close to a free dermal margin, which extends from the edge of the first 

 toe and turns forwards on the tarsus and is lost distad to its middle. 

 When the hind leg is extended the heel reaches the middle of the tym- 

 panum and the end of the tarsus reaches the extremity of the muzzle. 



Tlie length of the head is considerably less than its width, and enters 

 the total length nearly four times ; or, measuring from the supraoccip- 

 ital line, four and a half times. 



The color of the specimen is probably somewhat paler than normal 

 from the eii'ect of the alcohol. Girard states the fresh color to have 

 been " uniformly dark green." At present it is light brown, and below 

 whitish, with a fcnv i^ale spots on the thoracic and gular regions. 

 Thighs uniform light brown behind. 



The figure of this species given by Baird, as above cited, is good, 

 except that the parotoid gland is represented as too wide. This gland 

 in this species is quite peculiar in its form and position. 



No. 2572 ; one spec. 5 Fort Yuma, Cal, ; A. Schott. 



BUFO COLUMBIENSIS Bd. & Gird. 



Bufo coluiiibiensis Baird & Girard, Proc. Ac. Phila., 1853, p. 378 ; Girard, I. c, p. 77, 

 PL 5, fig. 4-9; Cope, Clieck List Batr. Rept. N. Amer., 187-5, p. 29. 



Bufo horcas Baird & Girard, Proc. Ac. Pliila., 1852, p. 174 ; Girard, U. S. Expl. Exped., 

 Herp., p. 74, PL 6, fig. 4-9; Boulenger, Cat. Batr. Sal. Brit. Mus., p. 296, fig. 



Bufo lialojyhUa Baird & Girard, Proc. Ac. Phila., 1853, p. 301 ; Girard, Proc. Ac. 

 PhiLi., 1854, p. 87, and U. S, Mex. Bound. Surv., 11, p. 26, PL 41, fig. 7-12 ; Boulen- 

 ger, Cat. Batr. SaL Brit. Mus., 1882, p. 295, fig. 



Bufo ehilensis, x^art, Giiutli., Cat. Batr. SaL Brit. Mas., 1868, p. 57. 



Bufo microscajphus Cope, Proceed. Ac. Pbila., 18G6, p. 301 ; Report U. S. G. G. Expl. W. 

 of lOOtli Mer., G. M. Wheeler, v. p. 522. 



Bufopicfus Cope, Report U. S. G. G. Expl. W. of lOOtli Mer., v., p. 522, PL xxv fig. 4-5. 



This is a variable species, so much so as to present the appearance of 

 including a number of subspecies. But these intergrade in so many 

 specimens that I can not maintain them as distinct, and I shall use 

 the term variety as more applicable to their case. 



