ADAPTATIONS AN'I) DISTRIBUTION 



air Icinperature of 0° C. Brccdiiii; pattern, mesic. (Figs. 5, 10, 12, 14, 16, 19, 



23,28,29.) 



17. Pscudacris triscriata (Wicd) (Slri}K-tl Chorus Frog) 



Ecologically unrestricted hut tends to he ahundant as Ps. clar{ii tends to 

 b; absent; hence, common in woodlands, savannahs, and tall-grass prairies, 

 rarer in mixed-grass and short-grass prairies. Breeding in almost any sort of 

 pools or creeks (bufifalo wallows in prairies, ditches, sloughs, flowing or still). 

 Uses playas in Texas Panhandle. I have found males calling at the edges of 

 very fast flowing streams (and have taken eggs from such waters) and at 

 pools at temperatures from near freezing to about 80° F. Breeding pattern, 

 intermediate. (Figs. 4, 7, 14, 16, 19, 21, 30.) 



18. Rciihi arcolala areolata Baird and (Jirard (Southern Crayfish Frog) 



Relatively little known. Has been seen calling in extensively flooded 

 fields and ditches in southeastern Oklahoma in April after extensive rain 

 (observation of Dr. Chas. C. Smith) and in February and March; was not 

 calling in same region after heavy rains in June. Breeding pattern, probably 

 mesic. 



19. Rcma areolata circulosa Rice and Davis (Northern Crayfish Frog) 



Known (in Oklahoma) only in the northeast. Breeding seen only rarely. 

 Reports from others suggested a mesic breeding pattern and general habits 

 similar to R. a. areolata:'' I have recently confirmed this. 



20. Rana catesbeiana Shaw (Bullfrog) 



Geographically unrestricted but ecologically restricted to edges of deep 

 pools, river sides, and lakes. Breeding in slightly deep water (never in shal- 

 lows), juveniles sometimes about shallow ditches in which they were not 

 produced. Breeding pattern, mesic. 



21. Ra?7a clamltans Latreille (Green Frog) 



Known in eastern Oklahoma (one record in the literature also from 

 Lincoln County) where it is mostly restricted to swamps, muddy banks of 

 streams or poo!s, and other swampy areas. Breeding observed in June in 

 Oklahoma; some were heard calling along two swampy creeks one night in 

 June just bejore an extensive rain. I^reeding pattern probably mesic here as 

 elsewhere. 



22. Rana palustris Le Conte (Pickerel Frog) 



Known in Oklahoma only from three specimens taken in McCurtain 

 County. Breeding here unobserved, probably has mesic breeding pattern 

 here as elsewhere. 



■"' I am indebted principally to my student, Mr. Harold Dundee, for notes on the 

 breeding of this form. 



77 



