222 IGUANIDE. 
denticulation formed by five pointed scales, which are not larger 
than those preceding. Dorsal scales much larger than ventrals, 
strongly keeled, denticulated and ending in a long spine posteriorly, 
forming parallel longitudinal series. Thirty-two scales between 
the occipital shield and the base of the tail; six scales correspond 
to the length of the shielded part of the head (eight or nine in the 
young, owing to the proportionally larger head); lateral scales 
keeled, directed obliquely upwards and backwards, gradually merging 
into the ventrals and dorsals; ventrals smooth, distinctly bicuspid ; 
forty scales round the middle of the body. The adpressed hind 
limb reaches nearly 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 equals the distance between the end of the 
snout and the middle of the oblique cervical fold. Twelve to 
fourteen femoral pores. Caudal scales a little smaller than dorsals. 
{Male with enlarged postanal scales.] Olive-brown above, with a 
rather ill-defined black collar ; throat green, belly whitish (female). 
“* Male grass-green above, with a rather narrow black collar com- 
plete above and below; chin greenish, throat, breast, and side of 
belly blue; a narrow yellowish, black-edged median ventral line.” 
millim. moillim. 
Total length ...... 165 Fore limb ........ 32 
Héad aie evan iw: 17 Hind limb ........ 48 
Width of head .... 15 MEAD ten tee ahaa! & a otc 97 
BOdy ii dsaw ames 61 
The adult male attains the size of S. torquatus. 
Guatemala; South Mexico. 
a-b. 9 & yg. Jalapa. Mr. Hoege [C.]. 
4. Sceloporus formosus. 
Tropidolepis formosus, Gray, Cat. p. 209. 
Sceloporus formosus, Viegm. Herp. Mex. p. 50, pl. vii. fig. 2; Bocourt, 
Miss. Sc. Mex., Rept. p. 182, pl. xviii. fig. 3. 
Tropidolepis formosus, Dum. § Bibr. iv. p. 303. 
Sceloporus malachiticus, Cope, Proc. Ac. Philad 1864, p. 178, and 
Proc, Am, Philos. Soc. xxii. 1885, p. 894. 
luneei, Bocourt, l. e. p. 184, pl. viii. bis. fig. 5; Cope, J. c. 
p. 395. 
smaragdinus, Bocowrt, 1. ¢. p. 186, pls. xviii. fig. 6, and xix. 
fig. 1 
~ viviparus, Cope, 1. c. p. 898. 
—— tenilocnemis, Cope, l.c. p. 399. 
torquatus formosus, Cope, i. ¢. p. 402. 
Head-shields smooth ; a series of four or five more or less trans- 
yersely enlarged supraoculars, bordered internally by a series of 
usually moderate scales; one or two canthal scales; occipital as 
long as broad, much larger than the parietals, of which there are 
frequently two on each side; anterior border of ear with a strong 
denticulation formed by four or five pointed scales, which are not 
