MEXICAN HERPETOLOGICAL MISCELLANY—SMITH 351 
Snout somewhat mutilated; labiomentals not reaching mental; 
gular scales notched posteriorly; temporal scales keeled, mucronate ; 
no distinct auricular lobules. 
Dorsal scales keeled, strongly mucronate, with several lateral 
mucrones, 39 from occiput to base of tail; 47 scales around middle of 
body; femoral pores 18-19; 20-21 lamellae under fourth toe. 
Snout to vent 94 mm.; tail 128 mm.; snout to posterior border of 
ear 21 mm.; fourth toe 21 mm. 
Color.—Bluish green above (yellowish where scales are not shed), 
unmarked save by a broad, black, nuchal collar, complete dorsally, 
and narrowly continuous around throat; digits and tail not notably 
barred. Throat greenish yellow anteriorly, becoming dark blue pos- 
teriorly; chest white; sides of belly dark blue, these areas reaching to 
groin and nearly to axilla but not onto thighs, and separated medially 
by a narrow light area only two or three scales wide; blue patches not 
dark bordered medially; ventral surfaces of limbs bluish. 
Variation —The 20 paratypes have the frontoparietals separated by 
contact of frontal and interparietal, except in one in which they are 
separated by a small azygous scale. The prefrontals are in contact in 
3, separated by contact of frontal and median frontonasal in 3, and 
separated by an azygous scale in 14. The cantlhals are 2 in all, the 
anterior never above the canthal ridge. The frontonasals are nor- 
mal except in 1, in which the median is separated from one of the 
laterals; the supraoculars are generally 5, sometimes 4 or 6, usually 
in 1 row, sometimes with a few small scales representing an outer 
row. The lorilabials are reduced to 1 row below subocular on 1 side 
in 4, on both sides in 8; the remainder have 2 complete rows below 
the subocular. The scales from the median frontonasal to rostral 
are 4 or 5 (4, 11; 5,9). Other variations in scale counts are given 
in Table 1. 
The young have faint, diagonal light and dark marks on the sides 
of the body. Both young and females have narrow, interrupted, 
transverse dark bands, about seven on the body and one or two on 
the neck. The nuchal collar is regularly present and complete in all, 
although sometimes not very well defined (in discolored specimens). 
Comparisons.—This species has a higher femoral pore count than 
any other of the group. The only ones with which it may be com- 
pared are m. acanthinus, formosus, and asper. The first rarely has 
16 femoral pores (its maximum count, occurring 3 times in 84 counts), 
the supraoculars are generally in contact with the median head scales, 
and the maximum dorsal scale count is 39. In formosus the dorsal 
scales reach their maximum count at 37 (4 in 52), the internasals are 
larger, there is no single large scale preceding the median fronto- 
nasal, and the coloration is considerably different. In asper the dor- 
sals are 35 or less, and the coloration is much different. 
