BARBOUR AND NOBLE: LIZARDS OF THE GENUS AMEIVA. 469 



A narrow stripe of dark straw-color runs the length of the back in the 

 median line. The upper surfaces, sides of tail and appendages are 

 profusely spotted with straw-color varying to bluish. The ventral 

 surface is pale straw-color varying to bluish on the outer ventral. 

 Part of the thighs is spotted with whitish or bluish. In regard to 

 scutation the only real difference from Ameim a. ameiva is in that the 

 brachials are considerably larger and break up proximally into three 

 or four rows of scales. In other specimens these brachial shields are 

 partly fused to form a single series of very wide and short scales. 



Variation: — Females may be readily distinguished from the males 

 by their color. For example, M. C. Z. 9924 (same data as above) has 

 no series of lateral spots but instead on each side of the body are two 

 narrow pale straw colored lines bordered narrowly above and below 

 with black. Except for a series of dark blotches on the back, tail, and 

 legs, the dark brown of the posterior part of the body in the male is 

 absent. A young female (M. C. Z. 9938) has not the "pepper and 

 salt" coloration of the adults but instead is olive-brown blotched and 

 dappled with dark brown. On each side is a broad dark brown band 

 edged with white. The blotching on the back and sides form two 

 parallel rows above and below these lateral stripes. 



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

 ured one hundred and eighty-four millimeters from snout to vent. 



Habitat: — If the locality Acapulco is correct it is distributed from 

 southern Mexico as far south as Panama where it is very common 

 on the savannah near the citv of Panama itself. 



List of specimens examined. 



Sexes Locality Date Collector Remarks 



both Panama (near city 1904 W.W.Brown, Descrip. 



of Panama) Jr. 



both San Miguel Island 1904 W.W.Brown, Jr. 



Panama Bay 



both Panama 1872 L. Agassiz 



both Acapulco, Mex. 1872 L. Agassiz 



c? Panama 1908 T. Barbour 



both San Pablo, Panama 1866 A. Lesley. 



Ameiva bifrontata bifrontata Cope. 



Description:— Adnlt male; Type M. C. Z. 10770. Labeled St. 

 Thomas, D. W. I., but doubtless from Venezuela. 



