BARBOUR AND NOBLE: LIZARDS OF THE GENUS AMEIVA. 463 



spots confluent and forming irregular bars and triangles; sides of body 

 with a series of whitish spots arranged in vertical rows, each spot 

 surrounded with black; these black areas somewhat confluent into 

 vertical rows ; on each flank the trace of a white stripe running from 

 the thighs onl}^ part way the length of the abdomen; two blackish 

 stripes on each side of the tail; ground color of ventral surface straw- 

 color tinged with bluish; gular and chin region sprinkled with black, 

 outer ventrals heavily spotted with the same color. 



Variation: — This species and its several races vary considerably 

 in both scutation and coloration. As mentioned (p. 462) the rows 

 are not sharply defined; the characters blend one into another. The 

 sexual differences are not very constant. In general a female is 

 browner and has not as many confluent black spots on its upper sur- 

 face. None of the variations of scutation seem to be sexual. _A 

 young female (same data as above) falls within the'scutation varia- 

 tions but its coloration is rather distinctive. On each side of the body 

 there is a wide black stripe margined with white, running from the eye 

 half way down the tail. No black spots are to be seen on the upper 

 surface of the body or head, but a few dark mottlings are found below 

 the black stripes. The under surface is pale blue varying to straw- 

 color; there are no black spots on the gulars. 



Remarks: — The description was made of an adult male measuring 

 one hundred and eighteen millimeters from snout to vent. Old males 

 often grow much larger than this specimen. 



Habitat:— Widely distributed over the northeastern part of South 

 America from the Demerara River in British Guiana as far south as 

 Bahia, Brazil, inland along the Amazon to as far west as the Madeira 

 River. 



List of specimens examined. 



