106 ESSENTIALS OF ZOOLOGY 



Suborder Procoela 



Family Bufonidae (Toads) 



Bufo (16 species). Species of Bufo are distributed over the entire United 

 States. Among common species in the Southwest are B. cognatus, B. com- 

 pactilis, B. debilis, B. fowleri, B. punctatus, B. valUceps, and B. wood- 

 housii. 



Family Leptodactylidae (Robber Frogs) 



Leptodactylus alhilabris (1 species). Found only in Texas.. 

 Eleutherodactylus (3 species). One species in Texas (Texas cliff frog), one 



species in Arizona, one species in Florida. 

 Syrrhophus (2 species). Both species limited to Texas. 



Family Hylidae (Tree Frogs) 



Acris gryllus (1 species). The cricket frog, widespread throughout eastern 

 and central United States, including the Southwest. 



Pseudacris (5 species). Throughout the same regions as Acris, Various 

 subspecies of the swamp cricket frog (P. nigrita) are common in the 

 Southwest. The recently described P. streckeri Wright, ranging through 

 Texas and Oklahoma to Mississippi, is* a very colorful species, and its 

 high-pitched staccato chirp is one of the earliest to be heard at breeding 

 pools in Texas. 



Kyla (14 species). Various species in all of the United States. They are 

 the most colorful of all the frogs. Common species in the Southwest 

 include : H. arenicolor, H. cinerea, H. crucifer, H. squirella, H. versicolor. 



Suborder Diplasiocoela 



Family Ranidae (True Frogs) 



Bana (18 species). Various species occur in all parts of the United States. 

 Common species in the Southwest are: E. sphenocephala, R. pipiens, B. 

 catesbeiana, B. clamitans. 



Family Brevicipitidae (Narrow-mouthed Toads) 



Hypopachus cuneus (1 species). In southern Texas. 



Microhyla (2 species). Ranges from Virginia to Texas, northward to Mis- 

 souri and Indiana. 



References 



Dickerson, Mary C: The Frog Book, Garden City, N. Y., 1906, Doubleday Page 



& Co. 

 Holmes, S. J.: The Biology of the Frog, New York, 1927, The Macmillan 



Company. 

 Kellogg, R. : Mexican Tailless Amphibians in the United States, National Mus. 



Bull. 160, U. S. National Museum, Washington, D. C. 

 Noble, G. K.: The Biology of the Amphibia, New York, 1931, McGraw-Hill Book 



Company. 

 Stuart, Richard R.: Anatomy of the Bullfrog, Chicago, 1940, Denoyer-Geppert 



Co. 



