12. SCELOPORUS 321 



atus has not been shown. This relieves us of the nomencla- 

 tural difficulty occasioned by the fact that the squamation 

 of this form seems to be constant on San Miguel Island, 

 but inconstant on Santa Rosa and Santa Cruz, a fact which 

 led me to use a trinomial for the lizards from the latter 

 islands, while describing the San Miguel Island specimens 

 as S. becki. 



Distribution. Sceloforus becki is known only from San 

 Miguel, Santa Rosa and Santa Cruz islands, Santa Barbara 

 County, California. The Ana Capa Islands seem to have 

 no lizards of this genus. 



Habits. This species is common in parts of Santa Rosa 

 and Santa Cruz islands, where its habits seem not to differ 

 from those of S. o. Occident alls. We found it usually on the 

 ground under bushes or clumps of cactus, on banks of earth, 

 or on rocks. A few were seen on trees and stumps. We 

 found it most abundant along the creek-bed on Santa Cruz 

 Island. 



64. Sceloporus jarrovii Cope 



YARROW'S SCALY LIZARD 



Plate 26 



Sceloporus jarrovii COPE, Surv. W. looth Merid., Vol. V, 1875, P 5^9, 

 pi. XXIII, figs. 2-2c, (type locality, Southern Arizona); COPE, 

 Bull. U. S. Nat. Mus., No. i, 1875, p. 48; YARROW, Bull. U. S. 

 Nat. Mus., No. 24, 1883, p. 57; COPE, Proc. Amer. Philos. Soc., 

 Vol. XXII, 1885, p. 396; COPE, Bull. U. S. Nat. Mus., No. 32, 

 1887, p. 38; VAN DENBURGH, Proc. Cal. Acad. Sci., Ser. 2, Vol. 6, 

 1896, p. 342; STEJNEGER, Proc. U. S. Nat. Mus., Vol. 25, 1892, 

 p. 150; COPE, Report U. S. Nat. Mus. for 1898, 1900, p. 345, fig. 

 49; STONE, Proc. Acad. Nat. Sci. Phila., 1911, p. 227; VAN DEN- 

 BURGH & SLEVIN, Proc. Cal. Acad. Sci., Ser. 4, Vol. 3, 1913, pp. 

 392, 403; STEJNEGER & BARBOUR, Check List N. Amer. Amph. 

 Kept., 1917, p. 54. 



