284 PROCEEDINGS OF THE NATIONAL MUSEUM vol. ue 



ill pjitcbes of spiny saltbush iii the Plains-Roughlauds ecotone. 

 Cnemidophorus velox also was present but imcoininon. 



Females, 54 and 55 mm. snout-vent, collected June 10, 1957, each 

 contained four eggs averaging 12.0 x 7.5 and 13.5 x 8.0 mm. respec- 

 tively. Three others, 50, 52, and 57 mm., held, respectively, three 

 (avg. 12.9 X 6.0), four (avg. 12.3 x 7.2), and four (avg. 12.0 x 6.0) 

 eggs on July 9. Eight females taken July 23, 1959, had deposited their 

 annual egg clutches, possibly in response to the onset of summer 

 rainfall. No hatchlings were ever observed. 



Locality records: 



MCKINLEY CO.: 3 mi. N. Thoreau (CU 5699); 3 mi. NE. Thoreau (CWGF); 4 

 mi. NNE. Prewitt (CU 5452, 5600, 5698; UMMZ 120282); Lizard Canyon, 

 Satan Pass (ANSP 20987*); 14 mi. N. GaUup (UCM 6608-11); 5 mi. S. Manuelito 

 (UMMZ 122888). 



Comparative material examined: 



Sceloporus g. graciosus. — New Mexico: san juan co.: 1 mi. N. Chaco Canyon 

 Nat. Mon. (UMMZ 120283) ; Chaco Canyon Nat. Mon. (UMMZ 122902); Blanco 

 Trading Post (CU 5617) ; 7 mi. E. Blanco (UCM 7274-79) ; 34-43 mi. SSE. Bloom- 

 field (UCM 7280-87, 7348-49); 2 mi. S. Colo.-N. M. state line on U. S. Rt. 666 

 (UCM 13292); 0.5 mi. S. Colo.-N. M. state line on U. S. Rt. 17 (UCM 1303-4). 



Uta stansburiana stansburiana Baird and Girard x U. s. stejnegeri 



Schmidt 



This is apparently another species with a north-south pattern of 

 subspecific intergradation in the Zuni region; however, the present 

 allocation must remain tentative until a series can be secured and 

 the races of U. stansburiana are better characterized. Zuni speci- 

 mens have 88 and 100 dorsal scales between the mterparietal plate 

 and posterior edge of the thighs. One has contiguous prefrontals; the 

 other has the prefrontals separated by two small scales (see Smith, 

 1946, p. 277). 



Based on present subspecific concepts in U. stansburiana, this 

 intergi'ade zone extends north into San Juan County, New Mexico. 

 Five specimens from Chaco Canyon National Monument (CU 5619; 

 UMMZ 122909) have 94-106 (x 99.2±1.5) dorsals; 6 from seven 

 miles east of Blanco (UCM 7392-97) have 106-112 (108.7 ±0.67), 

 and 10 taken two miles south of the New Mexico-Colorado state line 

 (UCM 13377-86) have 100-114 (107.4 ±2.0). The large number of 

 dorsals and prefrontal contact in only one San Juan County specimen 

 indicate that influence from U. s. stejnegeri is relatively slight. 



The apparent rarity of Uta in the Zunis is difficult to explain. The 

 two precise localities, at 6900 and 7100 feet, are relatively open grass- 

 land with sandy soil, rabbitbush, snakeweed, and scattered one-seed 

 junipers. The localities lie at the northwestern edge of mixed grass- 



