SYNOPSIS AND DESCRIPTION OF NORTH AMERICAN 



TADPOLES 



By A. H. Wright 



Of Cornell University, Ithaca, N. Y. 



The material upon which the paper is based has been collected for 

 the greater part by the author during many years of field work and 

 study. A full and representative series is in the author's collection 

 and another has been donated by him to the United States National 

 Museum. 



The investigations have been supported by grants from the Heck- 

 scher Foundation for the Advancement of Research, established at 

 Cornell University b}^ August Heckscher. 



The author extends acknowledgments to Dr. Leonhard Stejneger 

 and Miss Doris M. Cochran for their many courtesies. 



I. SYNOPSIS OF THIRTY-EIGHT SPECIES OF TADPOLES, MOSTLY 

 FROM EASTERN AND SOUTHERN UNITED STATES 

 The following synopsis is a summarized account of some of the 

 tadpoles the author has collected (except Ascaphus truei). As indi- 

 cated in the subtitle, the synopsis is not complete for all forms east of 

 the Mississippi River, as the following eastern forms are not included : 

 j^ , . [Material at hand but not worked over until all 



r, J- i 1 ■ ' \ Bufo species of United States of America are 

 Bufojowlen. — ' , „, j-^c i. 



I assembled. J hey are dimcult. 



Pseudacris.— In addition to what is included we have eggs and 



tadpoles of Pseudacris from Texas and some studies on 



Pseudacris ornata. Their life histories are being assembled. 



Hyla avivoca. — Mr. Percy Viosca, jr., its discoverer, knows this 



species well and doubtless will solve its life history. 

 Rana areolata. — Mr. George S. Myers and his previous associates 

 (such as Hermann P. Wright) at the University of Indiana are 

 supplying this gap in the series. 

 Rana cantabrigensis. — We have some of this material, but Mr. 

 E. B. Shelley-Logier has the most on this species. 

 In addition, we have added to the synopsis 11 species of the South- 

 west, the results of our 1917 and 1925 trips. The discussion of the 

 relationships of these tadpoles is reserved for a forthcoming paper. 



No. 2756.— Proceedings U. S. National Museum, Vol. 74, Art. li 



6350—29 1 1 



