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- 

 ocular atrata. 



g^ Frontal and frontoparietals separated from the third supra- 

 oculars by granules corvina. 



P Not uniformly colored, gulars differentiated into a median 

 group or band, 

 g^ Brachial shields small, scarcely differentiated from the 



granules of the arm vittipundata. 



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. 



fi Tibial shields with the second scale of the outer row wider than 



long; adult with two broad lateral stripes of black. . . .thoracica. 



P Tibial shields with second scale of the outer row not wider than 



long, adult with dark spots on the sides auheri. 



h^ Nostril between the nasal plates. 



c^ More than twelve rows of ventral shields. 



d' Eighteen 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, 

 fi Gulars forming a band of enlarged granules extending across the 



throat erythrops. 



P Gulars not forming a band, but three groups of enlarged granules. 



erythrocephala. 

 e^ Chin and throat bluish or smoky. 



f^ Nine irregular occipitals fuscata. 



P Five regular occipitals aquilina. 



c* Less than or just twelve rows of ventral shields, 

 di More than eight rows of ventrals. 

 e^ Twelve rows of ventrals. 

 f Dorsal granules small. 



gi 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. 



