BARBOUR AND NOBLE: LIZARDS OF THE GENUS AMEIVA. 479 



two keeled supraoculars preceded by a group of five or six small 

 keeled scales in the place of an anterior supraocular; the two large 

 supraoculars separated from the supraciliaries by a double row of 

 granules; last supraocular separated from the outer occipitals by four 

 or five rows of granules; six or seven large supralabials; five infra- 

 labials; between infralabials and chin-shields a wedge of a single row 

 of small scales together with several large scales extending anteriorly 

 to the first chin-shield; chin and throat covered with granules of 

 varying size, a broad band of slightly larger ones extending across the 

 middle; on the area between the two throat folds three or four rows 

 of small scales, the median ones about three times as large as the gulars, 

 all irregularly arranged; under side of the body with six longitudinal 

 and twenty-six transverse rows of scales; three somewhat rounded 

 preanal plates arranged in a triangle, the anterior one much larger 

 than the others; on the lower arm a single row of large antebrachials 

 extending its entire length on the lower arm two or three rows of very 

 small, irregular keeled scales; on the posterior side near the elbow 

 joint two or three rows of postbrachials, median row formed of very 

 large ones ; under side of thighs covered with three rows of large scales 

 ending abruptly in granules; twenty-four femoral pores; on the under 

 side of the tibia two rows of scales, the outer about twice as large as 

 the inner; on the upper side of the wrist between phalanges and joint 

 two transverse rows of large scales; outer toe extending a little further 

 than the inner ; tail covered with straight keeled scales, dorsally strongly 

 keeled; about nineteen scales in the fifteenth ring from the base. 



Coloration: — Dorsal surface dark olive-green; on each side a dark 

 brown band, bordered above and below by a light blue-gray stripe, 

 running the length of the body; a pale median line not very distinct 

 running from the occipitals to the tail; ventral surface dark blue-gray 

 suffused with yellow on the abdomen. 



Variation: — A female (same data as above) is similar to the male 

 except that the pale median stripe is brighter and wider than the 

 other pale lines, a condition which is reversed in the adult male. 



Remarks: — The description was made of an adult male that meas- 

 ured one hundred and eighteen millimeters from snout to vent. 



Cope's type of Holcosus bridgesii (Acad. nat. sci. Phila. No. 9651) 

 which we have examined is in fair preservation. It is rather less than 

 half grown. The locaHty slip which accompanied it bore simply 

 the word " ?Ecuador." In the original description (Proc. Acad. nat. 

 sci. Phila., 1868, p. 306-307) curiously enough no mention whatever 

 was made of habitat or locality. An examination of a series of this 

 species and a comparison with A. septemlineata and A. undulata makes 

 clear the relationship of this form. It does not seem at all advisable 

 to recognize Cope's monotypic genus. 



