Cope.] ^^^ [April 17, 



"One large row of supraorbitals; dorsal scales stroi^ly mucronate ; 

 throat and sides of belly blue ; collar complete, not light bordered". . 



acarithinus. 



One or two rows of large supraorbitals ; dorsals not or but little mucro- 

 nate ; collar complete, light bordered ; sides of belly blue, throat 



greenish or spotted torquatua. 



aa. About forty scales between occiput and grom. 



Two canthal scales ; dorsals not mucronate ; one row of large supraocu- 

 lars ; collar complete, pale-bordered jarrovii. 



aaa. About fifty scales between occiput and groin. 



Two rows of larger supraocular scales ; collar complete, light bordered. . . . 



ornatus. 

 2. Dorsal series of scales converging to the middle line posteriorly. 



Forty-three scales between occiput and groin ; two canthal scales ; two 

 rows larger supraoculars ; collar a narrow black line directed back- 

 wards from each shoulder, pale bordered behind, mostly interrupted ; 

 throat not blue dugesi. 



ScELOPORUS HORRiDus Wiegmann, Herpetologia Mexicana, pt. i, 1834, 

 p. 50. Tropidolepidus liorridus Dum. Bibr., Erpet. Generale, iv, 1837, 

 306. Bocourt, Comission Scientifique Mexique, p. 178, pi. xviii, 8, 

 8a, 8b. Sceloporous oligojwnis Cope, Proceeds. Acad. Philada., 1864, 

 p. 177. 

 Colima, J. Xantus, A. Duges ; Guadalaxara, Major ; Vera Cruz, Comm. 



Scientifique. 



ScELOPORUS siNiFERUs Cope, Proceeds. American Philosoph. Soc, 1869, 

 p. 159. Sceloporus humeralis Bocourt, Mission Scientifique, 1875, p. 

 206 ; pi. xviii, bis figs. 3, 3a, 3b. 

 Tehuantepec, Sumichrast ; Oaxaca, Salle. 

 Sceloporus squamosus Bocourt, Mission Scientifique Mexique, 1875, 

 212, pi. xviii, bis 7, 7a, 7b, 7c ; xix fig. 3. 

 Costa Rica, Van Patten ; Guatemala, Miss. Scientif. 

 Sceloporus utiformis Cope, Proceeds. Academy, Philada., 1864, p. 

 177 ; Bocourt, Miss. Sci. Mex., 187, p. 208 ; pi. xviii, bis, 6, 6a, 6b. 

 Colima, J. Xantus, Duges. 



Sceloporus chrysostictus Cope, Proceeds. Academy, Philadelphia, 

 1866, p. 125. Sceloporus cupreus Bocourt, Miss. Scientif. Mex , 1875, 

 p. 210; pi. xviii, bis 2, 2a, 2b. 

 Yucatan, Schott ; Guatemala, Van Patten ; Oaxaca, Boucard. 



Sceloporus scalaris Wiegmann, Herpetol. Mexicana, 1834, p. 52, tab. 

 8, fig. 2. Tropidolepis scalaris Dum. Bibr., Erpet. Gen., iv, 1837, p. 310. 

 Sceloporus scalaris Baird, U. S. Mexican Boundary Survey, Reptiles, 

 p. 6. Bocourt, Miss. Scient. Mexique, p. 202, 1875; pi. xviii, bis, 9, 9a, 

 9b. 

 Colima, Duges; Cuernavaca, Mehedin ; City of Mexico, Cope; Zacual- 



