FRi^QUENCY OF SHX CALLS 



In later papers I expect to present further data on these species and upon 

 others based u[)()n mechanical recordings. 



Literature Cited 



Bragg, Arthur N. 1940. Observations on the ecology and natural history of Anura I. Habits, 

 habitat and breeding of Btijo cognatus Say. Amer. Nat. 74: 322-349 and 424-438. 



. 1942. Observ. etc. X. The breeding habits of Psetidaa'ts strecl{eri Wright and 



Wright in Oklahoma including a description of the eggs and tadpoles. The Wasmann 

 Col. 5: 47-62. 



. 1943. Observ. etc. XVI. Life history of Pscrulacris claykii (Baird) in Oklahoma. 



The Wasmann Col. 5: 129-14(1. 



.1944-45. The Spadcfoot Toads in Oklahoma with a summary of f)ur knowledge 



of the group, .-^mer. Nat. 78: 517-533 and 79: 52-72. 



. 1948. Observations on the life history of Psetidacris tviscnalu (Wied) in Okla- 

 homa. The Wasmann Col. 7: 149-168. 



. 1948a. Observations on Hyla versicolor in Oklahoma. Proc. Okla. Acad. Sci. 



28: 31-35. 



. 1949. Oliservations in Microhyla. The Wasmann Col. (in press). 



Harper, Frances. 1937. A season with Holbrook's chorus frog i Pseiidcicris oniatii). .^mer. 

 Midi. Nat. 18: 260-272. 



Smith, H. M. 1949. Subspecies of the sonoran toad. (Biifo compactilis Wiegmann). Herpe- 

 tologica 4: 7-13. 



TAELE I 



Rates of Breeding Calls of Hyla v. rcrsicolor and Microhyla carolinensis oliracea in 

 eastern Cleveland County, Oklahoma, at various temperatures. AT & WT i= atmospheric 

 and water temperature respectively in °C.; T = total; Mo = mode; R r= range; M ^ 

 arithemetical mean number of calls per 10 seconds, expressed to nearest 0.1; N = number 

 of items; time is p.m., T =^ summary, mean or totals, for species. 



H. V. versicolor 



M. c. olivacea 



121 



