476 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
arm two irregular rows of postbrachials; on the under side of the tibia 
two rows of large plates and a few scales of a third row. 
Coloration:— Dorsal surface olive-gray; two narrow white bands 
on each side, the uppermost very indistinct; the dorsal surface be- 
tween the two upper lines marbled with black; a series of heavy 
black marblings on each side, the blotches very irregular in shape but 
evenly spaced; dorsal surface of tail and legs faintly mottled with 
black; ventral surface milkish or pale blue. 
Variation:— A male M. C. Z. 9540 (same data as above) differs 
from the female slightly in coloration. The white lateral lines are 
absent and the dark mottlings of the flanks are very distinct because 
the spaces between them are bluish instead of olive-gray. The general 
tonality of the dorsal surface is brownish instead of blue-gray. 
Remarks:— The description was made of an adult female that 
measured seventy-eight millimeters from snout to vent. Only two 
specimens were examined. 
Habitat:— Our specimens come from Chinandega, Nicaragua, but 
this race probably has a wider distribution. 
AMEIVA UNDULATA PARVA, nov. subsp. 
This local race shows relationship to both A. u. undulata and A. 
undulata quadrilineata but may be distinguished from both in having 
a short stocky head, and in having the gular scales except for the 
median group very small. 
Description:— Adult male; Type, M. C. Z. 5831. Guatemala. 
Similar to A. undulata quadrilineata but differing in scutation as 
follows: — throat and neck covered with very fine uniform granules, 
a median group of a dozen or fifteen large scales varying into the 
others; postbrachials in three rows, median largest; tibial shields 
in three rows. 
Coloration:— Much browner in tonality than A. undulata quadri- 
lineata, having also more dark mottlings on the sides and on the back; 
the spaces between the black blotches brownish, not blue; ventral 
surface straw-color instead of blue. 
Variation:— A female (same data as above) has the white lateral 
lines bordering a dark band on each side. A series of bluish spots 
arranged at regular intervals extends the length of this band. Several 
series of similar spots below these bands. A young specimen (same 
data as above) is similar to the female except that the entire flanks 
are blackish and that there are no spots present on the sides. The 
lower white line, however, is somewhat broken into spots. 
