9. HOLBROOKIA 177 



lected near Guaymas, Sonora, have recently been referred 

 to this species. 



Remarks. — Specimens from Guaymas, Sonora, are very 

 similar to Arizona specimens of H. m. a-pproximans. No 

 constant or even average scale differences appear, but the 

 hind leg and tail average longer in the specimens from 

 Guaymas. In these the tip of the longest toe of the 

 adpressed hind limb reaches to or in front of the eye while 

 in Arizona specimens the tip of the toe often does not reach 

 the eye. However, there is considerable individual varia- 

 tion and I regard the Guaymas specimens as but doubtfully 

 distinct from H. m. approximans. I have not seen speci- 

 mens from the type locality of H. elegans. 



30. Holbrookia texana (Troschel) 

 Band-tailed Earless Lizard 



Cofhomurus texatitts Troschel, Wiegmann's Archiv. f. Naturges., Vol. 1, 

 I8S0, (1852), p. 389, pi. IV, (type locality, Neubraunfels, 

 Guadalupe River, western Texas). 



Holbrookia texana Baird & Girard, Proc. Acad. Nat. Sci. Phila., Vol. VI, 

 1852, p. 125; Baird, U. S. Mex. Bound Surv., Vol. II, 1859, 

 Kept., p. 8, pi. 30; Baird, Rep. Pac. R. R. Surv., Vol. X, 1859, 

 p. 38; Cope, Proc. Acad. Nat. Sci. Phila., 1866, p. 303; Bocourt, 

 Miss. Sci. Mex., Kept., 1874, p. 163; Cope, Bull. U. S. Nat. Mus., 

 No. 1, 1875, p. +7; Yarrow, Surv. W. 100th Mcrid., Vol. V, 1875, 

 p. 564; CouEs, Surv. W. 100th Merid., Vol. V 1 875, p. 600; Cope, 

 Bull. U. S. Nat. Mas., No. 17, 1880, p. 14; Cope, Proc. Acad. Nat. 

 Sci. Phila., 1883, p. 12; Yarrow, Bull. U. S. N.at. Mus., No. 24, 

 1883, p. 50; Cracin, Bull. Washburn Laborat., Vol. I, 1884, p. 8; 

 BouLENGER, Cat. Lizards Brit. Mus., Vol. II, 1885, p. 208; Cope, 

 Bull. U. S. Nat. Mus., No. 32, 1887, p. 38; Van Denburgh, Proc. 

 Cal. Acad. Sci., Ser. 2, Vol. 6, 1896, p. 339, Herrick, Terry & 

 Herrick, Bull. Sci. Laborat. Denison Univ., Vol. XI, 1899, p. 122; 

 Herrick, Terry & Herrick, Bull. Univ. New Mexico, Vol. I, 

 1899, p. 122, pi. XIV, figs. 2-5; McLain, Contributions to Neotrop- 

 ical Herpetology, 1899, p. 2; Cope, Report U. S. Nat. Mus. for 



