CROCODILIANS, LIZARDS, AND SNAKES. 

 Sceloporus rariabilis IHe<jmanii. 



401 



Locality. 



San Antonio, Texas 



S;in Diego, Mexico 



Old lagoons south of Kuevo Leon 



San Antonio, Texas 



Salt Lake 



Medina 



San Autonio, Texas 



Cliina, Nuevo Leon 



Mataiuoros 



Charco E.scondido, iu Tamaulipas- 



Kediiiouds Itancbe 



San Diego, Texas 



Helotes, Texas 



Southwestern Texas 



From whom received. 



Dr. Woodhonse 



Lieutenant Couch. . 



do 



Dr. "SVoodhouse 



Captain Stansbury. 

 Colonel Graham. . . 



Dr. Woodhouse 



Lieutenant Couch. , 



do 



do 



Major Emory 



Wm. Taylor 



G.W.Marnock 



G. B.Sennett 



Nature of 

 sj)ecinieu. 



Alcoholic. 



do. 



do. 

 Type. 



do. 



do. 



do. 



do. 



do. 



do. 



do. 



do. 



do. 



do. 



SCELOPORUS SCALARIS Wiegmann. 



Sceloponts scalaris Wiegmann, Isis, 1828, j). 370; Herp. Mes., p. 50, pi. viir, fig. 

 2. — FiTZiNGER, Syst. Rept., 1843, p. 7.5. — Bocourt, Miss. Sci. Mex., Rept., 

 1874, p. 202, pi. XVIII bis, fig. 9.— Cope, Proc. Amer. Phil, Soc, XXII, 1885, 

 p. 394. 



TropidohpiH scalaris Gkay, Zool. P.eecliey's Voy., 1839, p. 95, pi. xxx, fig. 3. — 

 DuMEiUL autl BiBuoN, Erp. G6u., IV, 1837, p. 310. — Gray, Cat. Spec. Liz, 

 Coll. Brit. Mas., 1815, p. 210.— Aug. Dumeril, Cat. Meth, Mus. Hist. Nat,, 

 1851, p. 77. 



General i^laii of supraorbitals as in 8. nndulatus, the outer central 

 series of supraorbital plates small. The cephalic jjlates anteriorly and 

 laterally rugose. Two internasals and four postnasals. Two frontals. 

 Legs very short; proportion of longest toe about three-fourths the 

 cephalic plates. Dorsal, rump, and caudal scales about equal, rather 

 larger than the lateral, the former elongated, acutely pointed, with 

 moderate spine, and one lateral denticulation. Inside of tibia and 

 behind anus smooth. Femoral pores twelve. About forty-four oblique 

 rows of scales from occiput to tail; thirty from cervical fold. 



Olive gray, with a narrow line of white on each side the back, on the 

 center of a row of scales, the rest of which is black, these lines sep- 

 arated by six rows of scales. Back with a central gray line. Two rows 

 of elongated dusky crescents on the back, about thirteen from head to 

 tail, margined behind by lighter. Two other series less distinct iu each 

 side, separated by a broken light line. Two small dark spots on and 

 above the shoulder. 



Cat. Xo. 2SS4. This species has rather a slender head, its length being- 

 one and a half times the width. The large subcordate occipital has three 

 smaller ones on each side. The cephalic plates are 7, 1, 1, 2, 3, and 4 to 

 those immediately posterior to the single nasal plate, six in number. 

 All are remarkably symmetrical iu arrangement. The seven occipital 

 may perhaps be considered as five and two, the latter separated by 

 the large occipital. The last- men tinned series of four is composed of 

 two inner very large, and a lateral small. All are distinctly but mod- 

 erately rugose transversely. 

 NAT MUS 98 20 



