426 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
i? No lateral black band except in the young and these 
bands not margined with white...... ameiva praesignis. 
h? Dorsal surface greenish or olive, often spotted with black. 
i! Dorsal surface with heavy confluent spots of black. 
j! Throat sprinkled with a few black spots. .ameiva ameiva. 
j? Throat smoky. 
k! Brachials in three rows of subequal scales. 
atrigularis. 
k? Brachials in one row of very large scales and three 
rows of smaller ones........ ameiva melanocephala. 
i? Dorsal surface with a few black spots not confluent. 
j' A broad lateral band of brown on each side of the adult. 
amewa bilineata. 
j? Lateral stripe indistinct or wanting. .ameiva petersit. 
f? Dorsal granules Jargén: iw sn e.are dei eh ameiva. laeta. 
e? Ten rows of ventral plates. 
f1 A single, part double, row of very large brachials continuous 
with the antebrachials. 
gi Three posterior supraoculars surrounded with granules. 
bifrontata, 
g? Three posterior supraoculars not entirely surrounded with 
granules... <0! aztec Behe beest ee ae bifrontata divisa. 
f? A series of small brachials not continuous with antebrachials. 
gi Flanks and sides of thighs spotted with pale green, the spots 
arranged mostly in transverse rows.......... UD . ae exsul. 
g? Spots much more numerous and covering the back as well 
as: the flanks: ... a0 : kacuersediiens oh ee eee alboguttata. 
d? Eight or six rows of ventrals. 
e! Eight rows of ventral plates. 
f! A distinct median group of enlarged gular scales. 
gi A single row of large postbrachials....... undulata undulata. 
g? More than one row of postbrachials irregularly arranged. 
h! Two irregular rows of postbrachials of moderate size. 
undulata quadrilineata. 
h? Three irregular rows of postbrachials, the median row 
much larger than the others............ undulata parva. 
{2 No distinct median group of enlarged gulars. 
gi Second supraoculars divided longitudinally into several parts. 
septemlineata. 
g? Second supraocular entire: ... 0s. m)..0. Seva le edracantha. 
e*. Six, rowsof . ventral platesiieti ). aviala dane. See bridges .. 
