BARBOUR AND NOBLE: LIZARDS OF THE GENUS AMEIVA. 469 
A narrow stripe of dark straw-color runs the length of the back in the 
median line. The upper surfaces, sides of tail and appendages are 
profusely spotted with straw-color varying to bluish. The ventral 
surface is pale straw-color varying to bluish on the outer ventral. 
Part of the thighs is spotted with whitish or bluish. In regard to 
scutation the only real difference from Ameiva a. ameiva is in that the 
brachials are considerably larger and break ‘up proximally into three 
or four rows of scales. In other specimens these brachial shields are 
partly fused to form a single series of very wide and short scales. 
Variation: — Females may be readily distinguished from the males 
by their color. For example, M. C. Z. 9924 (same data as above) has 
no series of lateral spots but instead on each side of the body are two 
narrow pale straw colored lines bordered narrowly above and below 
with black. Except fora series of dark blotches on the back, tail, and 
legs, the dark brown of the posterior part of the body in the male is 
absent. A young female (M. C. Z. 9938) has not the “pepper and 
salt” coloration of the adults but instead is olive-brown blotched and 
dappled with dark brown. On each side is a broad dark brown band 
edged with white. The blotching on the back and sides form two 
parallel rows above and below these lateral stripes. 
Remarks:— The description was made of an adult male that meas- 
ured one hundred and eighty-four millimeters from snout to vent. 
Habitat:— lf the locality Acapulco is correct it is distributed from 
southern Mexico as far south as Panama where it is very common 
on the savannah near the city of Panama itself. 
List of specimens examined. 
No of 
M.C.Z. _ speci- 
No. mens Ages Sexes Locality Date Collector Remarks 
9924-41 18 all both Panama (near city 1904 W.W.Brown, Descrip. 
of Panama) JT: 
9942-47 6. all both San Miguel Island 1904 W.W.Brown, Jr. 
Panama Bay 
2627 2 ad. both Panama 1872 L. Agassiz 
2728&30 2 h.gr. both Acapulco, Mex. 1872. L. Agassiz 
7290 ye. o Panama 1908 T. Barbour 
3977 3 ad. both SanPablo,Panama 1866 A. Lesley. 
AMEIVA BIFRONTATA BIFRONTATA Cope. 
Description:— Adult male; Type M. C. Z. 10770. Labeled St. 
Thomas, D. W. I., but doubtless from Venezuela. 
