386 



REPORT OF NATIONAL MUSEUM, 1898. 



ou tlie cliiii is in two patches instead- of one, as is more generally the 

 case (though not always) in undulatus. The size appears considerably 

 less. The dorsal markings are more in the shape of triangular blotches, 

 as in the form 8. occidentidh, than in nndulatiug narrow lines. 



The lack of distinct yellow lines and the presence of the lateral 

 black stripe, with the carination of inferior tibial and postanal scales, 

 will distinguish it from S. u. consohrinm. This form is, so far as known, 

 restricted to southwestern Texas. It is peculiar in the genus in the 

 carination and acumination of the ventral scales, and in the same 

 character of the scales on the inferior surface of the tibia. The 

 scales external to the largo series of supraoculars are less numerous 

 than the species of this section, approaching very nearly to the type 



of 8. iristichus. 



Sceloporus ihayerii. 



Catalogue ^,j. ^p^^j. 

 mens. 



Xo. 



Locality. 



From whom received. 



Nature of specimen. 



2900 

 2859 

 2912 

 2850 

 2887 

 .2896 

 2907 

 3075 

 2864 



San Antonio, Texas 



Indianola, Texas 



Fail lo Pass 



Indianola 



do 



San Pedro, Texas 



Coal Creek 



Fort Bliss, New Mexico. 

 Indianola to Nueces 



Dr. "Woodhouse . 



Capt. Poi)e 



A. Schott 



Capt. Pope 



Col. Graham 



do 



Lieut. Whipple . 

 Dr. Crawford . . . 

 Capt. Pope 



Alcoholic. 



do. 



do. 



do. 

 Type. 



do. 



do. 



do. 



do. 



SCELOPORUS GRACIOSUS Baird and Girard. 



Sceloporus gracio'^us Baird and Girard, Troc. Acad. Nat. Sci. Phila., VI, 1852, 

 p. 69, pi. VII (Salt Lake), Type; Stansbnry Great Salt Lake Exped., 1852, p. 

 346, pi. V, fig. 1.— Cope, Proc. Amer. Phil. Soc., XXII, 1885, p. 395. 



Sceloporus gracilis Baird and Giuard, Proc. Acad. Nat. Sci. Phila. , VI, October, 

 1852, p. 75 (Oregon). —Girard, Herpt. U. S. Expl. Exped. (Ch. Wilkes), 1858, 

 p. 386, pi. XX, figs. 1-9.— BOCOURT, Miss. Sci. Mex. Rept., 1874, p. 190, pi. 

 xviii, fig. 4. 



Supraorbital region with a large crescent of transverse plates (much 

 broken anteriorly) with a second smaller in its convexity. Two more 

 external rows and an internal, making five in all. Cephalic i^lates 

 smooth. Two middle verticals. Occipitals with a row of small, smooth 

 plates behind. Free portion of hind toe reaching to middle of occipital. 

 Dorsal and lateral scales equal, acute, rather spinous; about fifty rows 

 of scales from head to tail. Femoral pores about fifteen. 



Olive gray with two light lines on each side; scales wide, not mar- 

 gined by black, separated by eight rows of scales. Two series of elon- 

 gated blackish crescents on each side the back. A vertical black 

 line from dusky lateral bar on neck to shoulder, with a whitish one 

 behind it. A bluish spot above insertion of arms. Two black lines 

 ou posterior face of tibia. Chin in male marbled w^ith blue; sides with 

 a blue patch separated below by seven or eight rows of scales. 



Lateral gular flap very small, almost wanting; only indicated by the 



