16 ON THE ZOOLOGICAL POSITION OF TEXAS. 



rariegated i)attern. The inner part of tlie spots is frequently cut eu- 

 tii-ely off. The spots are continued on the upper side of the tail, and 

 there are six irregular longitudinal brown bars on the neck A brown 

 band across supraorbital regions, and spot on upper surface of muzzle. 

 Limbs brown cross-banded. A i^ale band on inferior part of side, which 

 is crossed by the ends of the lateral spots. Below this are five or six 

 small darli spots, sometimes obsolete. Total length, .099; to collar, 

 .015; to vent, .056. This is a short legged species allied to the S. 

 maculata, but with longer tail and very different coloration. As com- 

 pared with the variety of H. maculata, above described, the labial scuta 

 are shorter and less oblique, resembling more nearly those of H. texana. 

 In coloration it differs from the H. maculata in a point not above men- 

 tioned. The dorsal ground color is everywhere the same, a rich yellow- 

 ish brown. In the H. maculata the median dorsal region is paler, and 

 the sides of the back are of a dark shade, which connects the spots as 

 by a wide band. 



The most northern locality for the HolbrooMa lacera with which I am 

 acquainted is in Erath County, west of the Upper Brazos. Mr. Boll 

 found it rather abundantly there and in Comanche County. Southward 

 it has been found by Mr. Marnock on the Guadalupe Eiver in Kendall 

 or Comal County. It thus belongs to the first plateau fauna, and is not 

 widely distributed. 



Holbrookia texana Troschel. Tail depressed, wide, and rather short ; 

 hind foot short, less than one-third head and body. Seven rather short 

 supralabial scuta; supraorbitals 15-20; scales of muzzle flat. Femoral 

 pores 13. Two blue crescents on the i^osterior part of each side in 

 male, and transverse black spots on the lower side of the tail in both 

 sexes. The largest species. This lizard is the characteristically abun- 

 dant form of Western Texas. I found it in the first plateau country to 

 the heads of the Medina and Upper Llano. Mr. Boll states that it does 

 * not range east of Fort Worth, in Northern Texas. I did not observe it 

 in the low country of Washington County. It evidently belongs to 

 the plateau fauna. It runs with great rapidity, with its tail gener- 

 ally curved upward, displaying the black spots on the lower side. It 

 prefers rocky ground, and does not ascend trees under ordinary circum- 

 stances. 



Uta symmetrica Baird. A single pair of this species was seen and 

 taken while running up the logs of a small ranch at one of the heads of 

 the Medina Eiver by Mr. Marnock. It had not been previously found in 

 Texas. 



