AMPHIBIANS 



i6^ 



Texas to California; northward into Colorado; southward into Mexico; 

 rather common. 



B. valliceps Wieg. Color chestnut brown above, with a dark 

 cross band behind the orbits and a dark lateral band; legs cross barred; 

 length 85 mm.: Louisiana and Texas. 



B. cognatus Say. Body large, dusky brown in color, with a yellowish 

 middorsal line from which project irregular lateral lines to the right 

 and left, giving the back a blotchy appearance; white underneath; 

 length 85 mm.; parotoid glands short and wide: western plains from 

 Kansas, Nebraska and Texas to south- 

 ern California. 



c. 



l-O^^ 



^K 



.J)o 



0- 



Lb. 





Subspecies of B. cognatus 



B. c. cognatus Say. Wyoming to 

 Texas; west to the Rockies. 



B. c. calijornicus Camp. South- 

 western California. 



B. alvarius Gir. Color dark green 

 or brown; belly whitish; length 165 

 mm.; parotoid gland a long oval: south- 

 ern Arizona and California; very rare. 



B. boreas B. and G. (Fig. 87). Body very large, either uniformly 

 dusky brown in color with a light middorsal line or with numerous spots 

 on a yellow or green ground; white underneath, spotted with black; 

 length 124 mm.; parotoid round or oval; no cranial crests: Pacific slope 

 from Alaska to Lower California; eastward to Utah; common. 



Fig. 



87. — Upper surface of head of 

 Bnfo boreas {from Cope), 



Subspecies of B. boreas 



B. b. boreas B. and G. Colors dark; web extending to tip of toes: 

 northern California to Alaska. 



B. b. halophilus B. and G. Body small, slender; color light brown 

 above; web deeply notched, 3 phalanges of fourth toe being free: central 

 California to Lower California. 



B. canorus Camp. Coloration dimorphic, the female being irregu- 

 larly blotched and the male specked with black; length 69 mm.; hind 

 leg 82 mm.; parotoids very large and circular; no cranial crests: Yose- 

 mite National Park, California, at elevations above 7,000 feet. 



2. Leptodactylus Fitzinger. Toes without discs; vomerine teeth 

 present; also a bony sternal style: many tropical American species; 

 I in Texas. 



