NATURAL SCIENCES OF PHILADELPHIA 215 



This species is darkei* tlian the last, and is much less orna- 

 mented. The color is a rich yellowish-brown ; where the epidermis 

 is lost on the head, a strong yellow pigment appears, so that it is 

 probable that it could in life change to that color at will. A deep 

 brown band commences by covering the whole eye and extends to 

 the shoulder, where it is marked by pale centred ocelli. It is 

 sei^arated above by a narrow paler band from a large dark brown 

 patch that covers the nape and scapular regions. Limbs and 

 tail broadly and indistinctly brown cross-banded. Belly and 

 throat immaculate. 



San Jose, Costa Rica. Dr. Van Patten. 



This large species is allied to the last, but perhaps resembles 

 more the Anolis biporcatus, Wiegm., the largest Anolis of Mexico. 

 The latter has, among other points of difference, keeled abdominal 

 scales and a shorter muzzle, with very different coloration. The 

 uniform size of all the scales is a noteworthy character of the 

 A. microtus. 



ANOLIS TROCHILTJS, Cope, sp. nov. 



Abdominal scales small, flat, smooth; tail cylindric, with similar 

 scales. Dorsal scales smaller than ventral, pavement-like, very 

 weakly keeled, graduating into those of the lower part of the 

 side, which are smaller. Head moderately elongate ; width be- 

 tween anterior margins of orbit, equal length of muzzle from same 

 point, measured on the side. Interrugal concavity of the front 

 well marked, occupied by very small scales, much less than those 

 of the rugse, in nine rows. Scales between rugse and canthus, 

 large. Two rows separate the superciliaries, which are separated 

 by three or four rows from the occipital. Five rows of loreal 

 scales. Six smooth scales in the supraorbital disc, those inner 

 larger, transverse, the three outer longitudinal. Four rows of 

 infralabials medially; nostril surrounded by small scales. Auri- 

 cular meatus one-half eye-slit. 



Limbs long, toes slender, the dilatations well marked. The 

 fore limb oppressed, reaches the groin ; the hind limb extended, 

 attains the end of the muzzle. Fan little developed. 



Above and below, brilliant metallic green with a few black dots 

 along the vertebral line. Head and anterior part of sides, brown; 

 a black V extending from the auricular openings, which are con- 

 nected by a broad black band with the orbits. Another V ex- 

 1871.] 



