232 PROCEEDINGS OF THE ACADEMY OF [March, 



17,910. Madera Canon, Santa Rita Mountains, Arizona. 1910. 

 Dr. H. A. Pilsbry. 

 Pituophis oatenifer deserticola Stejneger. Desert Bull Snake. 



16,514. Carr Canon, Huachuca Mountains, Arizona. August, 1905. 

 Dr. H. Skinner. 



17,581. North side of Grand Canon, Arizona. 1907. Dr. H. A. 

 Pilsbry. 



17,894. Las Gijas, Pima County, Ariz. 1907. Dr. H. A. Pilsbry. 



Thamnophis parietalis (Say). California Garter Snake. 



17,851. Sisson, Siskiyou County, Cal. August 15, 1909. Hebard 

 and Rehn. 



Thamnophis eques (Reuss). Brown Garter Snake. 



17,997. Sycamore Canon, Baboquivari Mountains, Arizona. Octo- 

 ber 6, 1910. Hebard and Rehn. 

 Elaps euryxanthus Kennicott. Sonora Coral Snake. 



17,932. Mineral Hill, 19 miles south of Tucson, Arizona. 1910. 

 Dr. H. A. Pilsbry. 



Crotalus oregonus Holbrook. Pacific Rattlesnake 



17,848-50. Sugar Loaf, near Sisson, Siskiyou County, Cal. August 

 15, 1909. Hebard and Rehn. 



Crotalus molossus Baird and Girard. Black-tailed Rattlesnake 



16,530. Carr Canon, Huachuca Mountains, Arizona. August, 1905. 

 Dr. H. Skinner. 



17,897. Walnut Canon, Santa Rita Mountains, Arizona, 6,000 feet. 

 1910. Dr. H. A. Pilsbry. 



Crotalus lepidus Kennicott. Green Rattlesnake, 



16,499-500. Carr Canon, Huachuca Mountains, Arizona. August, 

 1905. Dr. H. Skinner. 



17,903. Sheridan Canon, Big Hatchet Mountains, Grant County. 

 N. Mex. 1910. Dr. II. A. Pilsbry. 



17,921. Cochise Stronghold, Dragoon Mountains, Arizona. 1910. 

 Dr. H. A. Pilsbry. 



Dr. Skinner found them on the talus slide and they could often be 

 heard rattling underneath stones that had been disturbed. Unlike 

 most rattlesnakes, they invariably attempted to escape when ap- 

 proached. 



Crotalus pricei Van Denberg. Trice's Rattlesnake. 



17,902. Northwest flank of Old Baldy, Santa Rita Mountains, 

 Arizona, 7,500 feet. 1910. Dr. H. A. Pilsbry. 



A typical specimen and the only one seen by any of the parties. 



