FREQUENCY OF SEX CALLS 



TABLE IV 



Data on number of breeding calls of Psctidacris triscriiita per 10 seconds. Symbols and ar- 

 rangements as in Table I. Item 13 taken at the southern border of Rogers County. All others 

 from eastern Cleveland County. For other data on this species see Bragg (1948). 



Data on number of calls per 10 seconds on three species: Item 1 for Aa'is crepitans, item 2, 

 Btifo w. woodhoiisii, and item 3, 4, and 5 for Scaphioptts littrterii. All were recorded near 

 Norman, Oklahoma, those on Bufo from the Canadian River flood plain, the others in 

 the oak-hickory savannah 16 miles east of Norman. Symbols and arrangement as in 

 Table I. 



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