232 IGUANIDA, 
transverse supraoculars ; two canthal scales ; occipital a little broader 
than long; parietals very small, usually one pair on each side ; 
anterior border of ear feebly denticulated. Dorsal scales larger than 
ventrals, strongly keeled, not or but slightly mucronate, forming 
oblique series; forty-five to fifty scales between the occipital shield 
and the base of the tail ; twelve to fifteen scales correspond to the 
length of the shielded part of the head; lateral scales keeled, di- 
rected obliquely upwards, gradually merging into the dorsals and 
ventrals; latter smooth, mostly entire; forty-six to fifty scales 
round the middle of the body. The adpressed hind limb reaches 
the ear; tibia as long as the shielded part of the head ; the distance 
between the base of the fifth toe and the extremity of the fourth 
slightly exceeds the distance between the end of the snout and the 
posterior border of the ear. Fourteen or fifteen (thirteen to six- 
teen) femoral pores. Caudal scales much larger than dorsals. Male 
with enlarged postanal scales. Olive above, with transverse black 
spots ; a narrow black scapular collar, interrupted medially; male 
with a blue, black-edged elongate patch on each side of the belly. 
willim. millim. 
From snout to vent. 40 Fore limb ........ 18 
Head........ gig 1d Hind limb........ 26 
Width of head .... 8 
Reaches a size of 66 millim. from snout to vent. 
Mexico, Guatemala. 
u-b. Her. d 2. Guatemala. F. D, Godman, Esq. [P.]. 
16. Sceloporus microlepidotus. 
Tropidolepis microlepidotus, Gray, Cat. p. 209. 
Sceloporus grammicus, var. «, Wvegm. Isis, 1828, p. 370. 
—— microlepidotus, Wiegm. Herp. Mex. p. 51; Bocourt, Miss. Se. 
Mezx., Rept. p. 194, pl. xviii. bis, fig. 13; Cope, Proc. Am. Philos. 
Soc. xxii. 1885, p. 395. 
Tropidolepis microlepidotus, Dem. § Bibr. iv. p. 308. 
Sceloporus dispar, Baird & Gir, Proc. Ac. Philad. 1852, p. 127. 
Head-shields usually smooth; one or more series of feebly dilated 
transverse supraoculars; two canthal scales; occipital usually a 
little broader than long; parietals very small, usually one pair on 
each side; anterior border of ear with a denticulation of slightly 
enlarged pointed scales. Dorsal scales as large as or a little smaller 
than ventrals, strongly keeled, not or but slightly mucronate, form- 
ing oblique longitudinal lines ; sixty-two to seventy-eight scales 
between the occipital shield and the hase of the tail; sixteen to 
twenty (fifteen to twenty-two) scales correspond to the length of the 
shielded part of the head; ventrals smooth, entire or bicuspid; 
sixty-six to seventy-eight scales round the middle of the body. The 
adpressed hind limb reaches the shoulder or the ear; tibia about as 
long as the shielded part of the head; the distance between the base 
of the fifth toe and the extremity of the fourth excceds the distance 
