206 



NORTH AMERICAN FAUNA. 



[No. 7. 



The gradation of this form into 8. grahamia', without suboculars, is 

 shown by a specimen collected by Dr. Edward Palmer at St. Thomas, 

 Nev. (U. S. Fat. Mas. No. 15010), which has one on one side bat none 

 on the other. 



[St. Thomas is less than 30 miles from the point where my specimen 

 (No. 180G2) was collected, and is in the same valley. — C. H. M.J. 



List of specimens of Salvadora grahamim liexalepls. 



U.S. 

 Nat. 

 Mus. 

 No. 



Sex and 

 age. 



Locality. 



Alti- 

 tude. 



Date. 



Collector. 



Remarks. 



18059 





Argus Range, Shepherd Canon, 



Calif. 

 Argus Range, Matnrango Spring, 



Calif. 



Feet. 



Apr. 26 

 May 2 

 Mar. 16 



May 8 







18060 

 18061 



....do 



PL in, fig. 2. 



1,000 feet above 

 the Amargosa 

 river. 







18062 



II 



Virgin River, near Bunkerville, 

 Nev. 





Merriam . 



Pituophis catenifer (Blainv.). 



The only two specimens which I can refer to the typical form of this 

 species are from the coastal or west slope of the Sierra Nevada, and 

 from Old Fort Tejon, in the Canada de las Uvas, California, and are 

 better recognized as such by their coloration and general aspect than 

 by any exclusive structural character, True, the carination of the 

 scales is weak and the eight outer scales are smooth in both, but the 

 character derived from the carination is a very elusive one, as will be 

 demonstrated under the heading of the next form, and can not alone 

 be relied upon to define these very difficult and variable snakes. 



List of specimens of Pituophis catenifer. 



U.S. 

 Nat. 

 Mus. 



No. 



Sex and 

 age. 



Locality. 



Alti- 

 tude. 



Date. 



Collector. 



Remarks. 



18063 

 18064 





South Fork Kings River, Calif 



Old Fort Tejon, Calif 



Feet. 



8,000 



Aug. 17 

 July 8 



Palmer 



do 



Bubb's Creek. 











Pituophis catenifer deserticola, siibsp. nov. 



By this name I propose to designate the form usually called P. bel- 

 lona, or P. sayi bellona, as there can be no doubt that Baird's and Girard's, 

 original Churchillia bellona,whic\i came from Presidio del Norte. Chihua- 

 hua, Mexico, was a typical P. sayi. The type appears now to be lost, but 

 I have before me a specimen from theidentical locality (U. S.Nat. Mus. 

 No. 1542) Avith a most pronouncedly narrow rostral and agreeing with 

 P. sayi in all other respects also. Of all the later names applied to va- 

 rious forms or individuals of the present species noue seem to have 

 been based upon the richly-colored form from the Great Basin and the 



