314 PROCEEDINGS OF THE NATIONAL MUSEUM vol. lie 



of hibernation sites located in rocky uplands. Both juveniles and 

 adults were often active during early morning and late afternoon hours; 

 they contained recently ingested lizards as well as rodents. Two 

 taken at 9:00 and 10:35 a.m., July 7, 1956, at 7200 feet had eaten 

 Sceloporus undulatus. 



Jon A. Peterson and field companions described (in litt.) a "combat 

 dance" involving two large individuals at 9:00 a.m., July 14, 1959, 

 near Tinaja, Valencia County. The rattlesnakes, each about three 

 feet long, were situated in bright sunlight in the open grassland of 

 the Miocene lava plain at 7400 feet. A few junipers and pinyons 

 were nearby. The snakes were twisted about each other anteriorly 

 in a position vertical to the ground. After several minutes of observa- 

 tion (photographs were taken, which I have seen), the snakes were 

 disturbed; they were not collected. 



Locality records : 



MCKINLEY CO.: 4 mi. S. Thoreau (CWGF) ; 6 mi. S. Thoreau (CU 5046, 5446, 

 5603); 10 mi. N\V. Thoreau (CU 5673); 5 mi. NE. Thoreau (CU 5674); 4 mi. 

 NNE. Prewitt (CU 5457, 5633); Prewitt (UMMZ 79392); Ft. Wingate (USNM 

 8399); 2.5 mi. N. Upper Nutria (KUMNH 45765); 11 mi. W. Ramah (UMMZ 

 122882); Valencia co.: 1.5 mi. S. Grants (UMMZ 86635); 8 mi. SE. Grants 

 (UMMZ 86634) ; 10.4 mi. S. Grants (CU 5590) ; 25 mi. S. Grants (MCZ 62267*) ; 

 Tinaja (CU 5604) ; Acoma Pueblo (USNM 44483) ; El Morro Nat. Mon. (CWGF). 



Species of Questionable Occurrence 



Certain amphibians and reptiles that may occur in the Zunis are 

 currently unrecorded. This undoubtedly obtains for medium to small 

 colubrid snakes in view of the late discovery of Diadophis pundatus 

 in the region. Arizona elegans, Elaphe guttata, Lampropeltis doliata, 

 and Opheodrys vernalis are present in north-central New Mexico and 

 southwestern Colorado or adjacent Utah and eventually may be 

 collected in or near the Zuni region. The latter two species can be 

 presumed to occur on the basis of observations by local residents. 

 A. elegans, collected near Farmington (A. Harris, in litt.), is the only 

 one of these snakes recorded from San Juan County, New Mexico: 

 it has been taken near Madrone, Valencia County (UNMCV 407). 



Sceloporus magister, Crotaphyty.s wislizeni, and Cnemidophorus 

 tigris also occur in north-central New Mexico and southwestern 

 Colorado. The latter two lizards and Heterodon nasicus are charac- 

 teristic of a type of sandy habitat seemingly lacking in the Zunis. C. 

 wislizeni is present near Laguna (USNM 4274), but C. tigris has been 

 taken no closer than nine miles south of Shiprock (AMNH 77530) 

 and Blanco, San Juan County, New Mexico (A. Harris, in litt.). 

 H. nasicus was collected between Laguna and Correo, Valencia 

 County (UNMCV 391). S. magister is known from Montezuma 



