BARBOUR AND NOBLE: LIZARDS OF THE GENUS AMEIVA. 425 
e? Gular scales uniformly minute, or tending to form a central group 
of slightly larger ones. 
f! Uniform dark brown in coloration, gulars not differentiated 
from each other. 
g! Frontal and frontoparietals in contact with the third supra- 
SIRES Fd hh LCR eaale A WETS A AIWAT ce btnal C Uh e atrata. 
g? Frontal and frontoparietals separated from the third supra- 
RVMamS Oy eames sho... oi Ga aN Stee eee ees corvina. 
f? Not uniformly colored, gulars differentiated into a median 
group or band. 
g! Brachial shields small, scarcely differentiated from the 
pramules ‘of othevama! (Asoo Pee ee. vittipunctata. 
g? Brachials in two or three rows of moderate sized plates. 
chrysolaema. 
d? Ten longitudinal rows of ventrals. 
e! Antebrachials continuous with the brachials............ dorsalis. 
e? Antebrachials not continuous with the brachials. 
f! Tibial shields with the second scale of the outer row wider than 
long; adult with two broad lateral stripes of black... .thoracica. 
{2 Tibial shields with second scale of the outer row not wider than 
long, adult with dark spots on the sides.............. auberi. 
b? Nostril between the nasal plates. 
c! More than twelve rows of ventral shields. 
d! Kighteen longitudinal rows of ventral plates............ cineracea. 
d? Fourteen longitudinal rows of ventral plates. 
e! Chin and throat bright flesh color in sharp contrast to the colora- 
tion of the neck region. 
f! Gulars forming a band of enlarged granules extending across the 
Se Lh, ee eee. DES erythrops. 
f? Gulars not forming a band, but three groups of enlarged granules. 
erythrocephala. 
e? Chin and throat bluish or smoky. 
Pepane inregularoccipitals. 66.0. OTe ee dea " fuscata: 
Pemiemeeretular occipitals. ... 6.0)... 04. ake aqutilina. 
ec? Less than or just twelve rows of ventral shields. 
d! More than eight rows of ventrals. 
e! Twelve rows of ventrals. 
f! Dorsal granules small. 
g! Preanal plates minute, and undifferentiated; brachial shields 
uniform in five or six rows of swollen scales. .ameiva maculata. 
g? Preanal plates differentiated into a group of larger ones; 
brachial shields in two or three rows, outer row wider than 
others. 
h! Dorsal surface spotted with white or yellow. 
i! A black band on each side, the edges of which are undu- 
lating and have no white margin........... tobagana. 
