THE HERPETOLOGY OF HISPANIOLA 187 



lighter color of the back and the dark of the sides forms nearly straight 

 dorsolateral lines. In others these dorsolateral lines are wavy and in 

 a few the dark brown extends up from the sides at intervals and very 

 nearly reaches the center of the back, or does so in a few places. 



"The females do not attain the size of the males, the longest one in 

 the collection measuring 41 mm. from snout to vent as against 49 mm., 

 the longest male. Moreover, the head is proportionately shorter in 

 the females. Usually the females are distinguished from the males 

 by the absence of the two enlarged scales just posterior to the vent 

 on the under surface of the tail. Some females, such as A.M.N.H. 

 No. 51114, verified by dissection as to sex, may have a pair of large 

 post-anal scales but these are not so well developed as in adult males. 

 In the majority of females, however, these enlarged scales are either 

 entirely lacking or are very small. 



"In life, the male is an extremely beautiful lizard. In its usual and 

 brightest phase the dorsal surface of the head is an olive-green; the 

 neck a lighter green, spotted with brown. The back is a bluer green 

 while the four broad saddles or cross-bars are a tone of burnt umber. 

 The dorsal surface of the tail, for the anterior two-thirds, is a yellow- 

 ish green with several dark brown bars. The posterior end of the tail 

 is brown. The side of the head is greenish brown back to the eye. 

 The upper eyelid may be a vivid golden yellow. The posterior comer 

 of the lower lid may be blue or purplish. Just posterior to the eye is 

 a narrow patch of dark brown, followed by a crescent of light blue or 

 white. Posterior to this the side of the head is a brownish green 

 merging into the lighter green of the side of the body which is peppered 

 and veined with brown. Extending from a point on the upper labials 

 anterior to the eye along the sides of the body nearly to the hind leg 

 is a slightly broken white or cream-colored line edged with brown and 

 suffused in the region over the front leg with yellowish green. The 

 legs are light brown above with slightly darker bars. They are nearly 

 white beneath. The ventral surface of the abdomen is cream-colored, 

 faintly tinted with brown and green. The throat is the same color 

 with several rows of very faint brown spots along the sides. 



"This species changes color rapidly and to a marked degree. When 

 the lizard is caught or frightened these colors may almost instantly 

 become darker, the green changing to gray or dark brown with the 

 brown cross-bars growing darker and almost black edged. The head 

 becomes dark bro\vn and the labials greenish. The pineal region be- 

 comes white and very conspicuous. The ventral surfaces turn green 

 ish or yellowish and the spots become more distinct." 



A paratype, A.M.N.H. No. 51107, was compared with the type of 

 A. hendersoni, the very close relationship of the two species being ap- 

 parent in their similar head and body proportions and in such details 

 as the scales under the chin, which are highly convex and crowded 



