394 CALIFORNIA ACADEMY OF SCIENCES [Proc.4TH SER. . 
73. Tantilla nigriceps 
74. Tantilla wilcoxi 
75. Elaps euryxanthus 
*76. Sistrurus catenatus edwardsii 
77. Crotalus molossus 
78. Crotalus atrox 
79. Crotalus tigris 
80. Crotalus confluentus 
81. Crotalus oregonus 
82. Crotalus cerastes 
83. Crotalus mitchellii 
84. Crotalus lepidus 
85. Crotalus price 
*86. Crotalus willardi 
NOTES ON THE SPECIES IN THE COLLECTION OF THE 
ACADEMY 
2.—Hyla arenicolor Cope 
Forty-three adult specimens are at hand, and the collection 
includes also some tadpoles and young. In Pima County 
this tree-toad was collected at East Sabino Basin, June 19, 
1912; in Pima Canyon, June 7, 1908; at the steam pump 
eighteen miles north of Tucson, May 16-18, 1912—all in the 
Catalina Mountains. In Cochise County this species was 
found in Ramsey Canyon in the Huachuca Mountains, July 7, 
1912. In Maricopa County some were secured at Cave Creek, 
April 17, 1910; and in Coconino County three were caught at 
Oak Creek, Sept. 2-4, 1912. They usually were found sitting 
on boulders in rocky streams. 
3.—Bufo lentiginosus woodhousii Girard 
We have secured twenty-one adults and a number of young 
toads of this kind. Of these, eight are from Yuma, Sept. 10— 
21, 1912, and Dec. 31, 1909; three from Phoenix, March 16, 
1910, and Sept. 13, 1912; five were collected at Cave Creek, 
April 2—Sept. 14, 1910; and five were caught at Fairbank, 
August 12-18, 1912. At Yuma, they were found at night 
under the electric lights. 
