366 TEIIDE. 
Var. mexicanus. 
Cnemidophorus mexicanus, Peers, Mon. Berl. Ac. 186), p. 62. 
? Cnemidophorus communis, Cope, Proc. Amer. Philos, Soc. xvii. 1877. 
p. 95. 
Cnemidophorus sexlineatus, var. mexicanus, Bocourt, Miss. Se. Mez., 
Rept. p. 281, pl. xx. c. fig. 7. 
Size larger. Head rather more elongate. Brown above, with 
three white lines on each side, the interspaces between them blackish 
and, in males, white spotted; in the latter the longitudinal lines 
more or less broken up into spots; lower surfaces white, spotted 
with black in the males. 
miflim. millim 
Total lengths co-6 a ate curea ieee a 303 254 
Head. sa2qecenisenseas eae 22 17 
Width of head................ 13°5 10°5 
From end of snout to interparietal 
plates. sassgens ate anes rede we 17 13 
Width at posterior corners of supra- 
ocular region ............., 9 7 
From end of snout to fore limb .. 33 25 
From end of snout to vent ...... 93 74 
Fore limb... ess anes Sere es ees 28 26 
Hind WMb: sjccceeeseeewsw cay 63 55 
OIL ose co. dads cop giewigtane: Soh accra 210 180 
Mexico. 
a-f. 6, 2, & hgr. Presidio, W. Mexico. Hr. A. Forrer [C.]. 
Var. angusticeps. 
Cnemidophorus angusticeps, Cope, Proc. Amer, Philos. Soc. xvii. 1877, 
p. 95. 
Differs from C. sexlineatus in the very narrow parietal plates. 
The light bands are much wider than the interspaces, and send off 
lateral processes, which give the dark ground-colour a very broken 
character; the colour of the bands is an olive-green. The adult 
male of about the size of C. gutéatus. 
Yucatan. 
Var. costatus. 
Cnemidophorus costatus, Cope, Proc. Amer. Philos, Soe. xvii. 1877, 
p. 99. 
Resembles the last two in general characters, but differs in the 
shorter head, and strikingly in the coloration. Brown, with black 
cross bands on sides, which join across the middle line on the lumbar 
region; sacral region and femora white spotted. 
Mexico. 
