BAKBOUR AND NOBLE: LIZARDS OF THE GENUS AMEIVA. 439 



Ameiva exsul Cope. 



Description:— Aduh male; M. C. Z. 2746. St. Thomas, D. W. I.; 

 1872; L. Agassiz. 



Rostral forming an acute angle behind; nostril between the two 

 nasals; anterior pair of nasals narrowly in contact behind rostral; 

 frontonasal longer than wide in contact with the loreal; prefrontals 

 broadly in contact; frontal in contact with the first and second supra- 

 oculars, just touching the third; a pair of frontoparietals in contact 

 with the third supraocular anteriorly; five occipitals in a transverse 

 row, the median largest; six or seven supraciliaries ; four supraoculars, 

 the first separated from the loreal; three posterior supraoculars 

 separated from the supraciliaries by a double row of granules; last 

 supraocular separated from the outer occipitals by three rows of 

 granules; six large supralabials; five large infralabials; between the 

 infralabials and chin-shields a wedge of from one to three granules 

 extending anteriorly nearly to the postmental; chin and throat 

 covered with minute granules, a faintly indicated band of slightly 

 larger ones extending across the middle in which again the median 

 ones form an ill-defined central group of somewhat enlarged scales; 

 on the area between the two throat folds several rows of larger hex- 

 agonal scales; under side of the body covered with ten longitudinal 

 and thirty -five transverse rows of plates; three large preanal shields 

 forming a triangle; on the lower arm a series of very wide plates 

 decreasing in width toward the elbow joint to form several rows of 

 smaller hexagonal scales; on the upper arm a similar but narrower 

 series of brachials not continuous with the antebrachials; on the 

 posterior side near the elbow a small group of enlarged scales; under 

 side of thighs covered with six or seven series of hexagonal plates of 

 which three rows are considerably larger than the others; fourteen 

 to fifteen femoral plates; on the under side of this tibia two rows of 

 plates, two plates of the outer row enormously enlarged; upper side 

 of the wrist with a regular series of transverse plates corresponding 

 to the inner and outer metatarsals; outer toe extending about as far 

 as the inner; tail covered with straight, keeled scales; about forty- 

 three scales in the fifteenth ring from the base. 



Coloration: — Ground tone of dorsal surface dull olive-green becom- 

 ing more olive on the head and grayer on the tail; posterior part of 

 the back with slight traces of black penciling; flanks, sides and upper 

 surfaces of legs, and sides of tail spotted with pale blue-green, the spots 

 arranged mostly in a series of transverse rows; on each flank a series 

 of large irregular black spots; ventral surface straw-color, grayer on 

 gulars, suffused along the sides with turquoise-blue. 



