49. scELOPORUs. 235 



frequently with oblique blackish lines converging posteriorly ; an 

 elongate deep-blue patch on each side of the belly in the male. 



millim. millim. 



Total len-th 148 Fore limb 25 



Head . . 15 Hind limb 40 



Width of head .... 12-5 Tail 85 



Body 48 



Mexico to Sonora and South-western Texas. 



a-b. 2 . Altisco. 



c-d. Hgr. & yg. Hacieuda del Hobo. P. Geddes, Esq. [P.]- 



e,f-g., k~k. (S 2 • Mexico. 



19. Sceloporus pyrrhocephalus. 



Sceloporus pyrrhocephalus, Cope, Proc. Ac. Philad. 18G4, p. 177, and 

 Proc. Am. Philos. Soc. xxii. 188o, p. 394. 



Head-shields smooth ; one caathal scale ; a series of five trans- 

 verse supraoculars ; occipital large, much broader than long ; parietals 

 exceedingly small ; scales of ear-fringe a little larger than those 

 anterior to them. Dorsal scales much larger than ventrals, strongly 

 keeled, unimucronate, converging to the middle line, in about 

 twenty-five transverse scries from nape to crural region ; lateral 

 scales larger than abdominals ; of the latter a portion only slightly 

 emarginate. Femoral pores twelve. Tail much compressed. 

 Greenish brown, with a broad black band from the scapular region 

 to the groiu, light bordered above ; below yellowish, sides bluish ash 

 to near the median line, on each side of which is a series of from 

 seven to nine transverse blue bars ; upper labial and gular region 

 striped with a series of black or bluish lines, which converge pos- 

 teriorly on a paler or deeper yellow ground ; top of head bright 

 chestnut-red or brown. 



millim. millim. 



Head 13 Hind limb 36 



Body 45 Foot 15 



Fore limb 24 



Colima, Mexico. 



20. Sceloporus chrysostictus. 



Sceloporus chrysostictus, Cope, Proc. Ac. Philad. 18GG, p. 125, and 



Proc. Am. Philos. Soc. xxii. 1885, p. 394. 

 ? Sceloporus cuprous, Bocourt, Mias. &•. Me.c, Pept. p. 210, pi. xviii. bis. 



fig. 2. 



Head-shields keeled or striated ; two (or one) eanthal scales ; a 

 series of four or five large transverse supraoculars ; occipital broader 

 than long ; parietals very small, one or two on each side ; anterior 

 border of ear very feebly denticulated. Dorsal scales much larger 

 than ventrals, strongly keeled, simply pointed, forming slightly 

 oblique longitudinal lines ; forty to foryt-five scales between the 



