TEIID LIZAltDS OF THE CxKNUS CNEMIDOi'IIOllUS 7 



San Diego Society of Natiirsil Ilistoi'v; to Mr. C. 1). liuiikei- of the 

 Kansas ITniversity Museum: to Dr. Minna E. Jewell and Mr. How- 

 ard K. Gloyd of the Kausus State Agricultural College: and to Dr. 

 Edward H. Taylor of Kansas University for the permission to ex- 

 amine a substantial collection of unreported specimens from the 

 Western States. 



Especially fine loans have been made by the following institu- 

 tions: The United States National Museum (over 1.000 specimens), 

 the American Museum of Natural History, the Eield Museum of 

 Natural History, the Museum of Comparative Zoology, the Cali- 

 fornia Academy of Sciences, the Carnegie Museum, and the 

 Museum of Vertebrate Zoology of the University of California. 

 Additional loans have been made by Dr. A. I. Ortenburger of the 

 Oklahoma University IMuseum, Dr. Vasco M, Tanner of Brigham 

 Young University, Dr. J. E. Guthrie of Iowa State College, and 

 Dr. W. L. Burnett of the Colorado State Agricultural College. 



The writer wishes to express here his appreciation to his wife. 

 May Danheim Burt, who has accompanied him on all of his visits 

 to the museums mentioned above, and has rendered invaluable aid 

 in recording and computing data from the specimens examined. Her 

 interest in the work has been scarcely less than that of the writer 

 himself, and he does not hesitate to say that he feels that her 

 opinions and observations (which have at times differed from his 

 (twn) have had a great stabilizing influence on the enterprise as a 

 whole. 



In connection witii the review and interpretation of the literature, 

 valuable aid has been given by various persons and agencies. To 

 these the writer is extremely grateful. Especial acknowledgement 

 is here extended to Dr. Peter O. Okkelberg for the translation of the 

 important Danish articles written by Reinhardt and Liitken (18G1, 

 186'2). and to Dr. Carl L. Hubbs for checking the agreement of the 

 specitic and subspe?ific names used in this work. 



Mr. H. W. Parker has kindly furnished a list of the type 

 specimens of Cnemidophorus in the collection of the British Museum 

 as well as specific information concerning the type of Cnemidophorus 

 'inttatus Boulenger. Data pertaining to the tyj^e of Cneimd'Oplionin 

 rocfirhmnrinl Werner have been obtained througli the kindness of 

 Herr P. de Grijs of the Hamburg Museum. 



The author is deeply indebted to Miss Doris M. Cochran of the 

 United States National IMuseum for the illustrations of color pat- 

 terns, to Mr. M. Graham Netting of the Carnegie Museum for 

 taking the photographs from which the line drawings were made, 

 and to May Danheim Burt for the preparation of the distributional 

 maps and line drawings. 



