Amphibians and Reptiles of Mexico. 321 



the belly and the under surface of the hind limbs are pale bluisli 

 or greenish blue (841, 361, 366, 371, 416, 421) tliat is restricted to 

 Spots along the sides wliere encroached lipon by the dark color of 

 the tianks. Toward the middle the belly becomes paler, occasionally 

 clear white, but usually tinged witli blue (0421) and sometimes with 

 yellow. The chin and throat are generally colored like the middle 

 of the belly. but may be yellow or red in old males (see belowj. 



In the females the vertebral band is margined with a narrow 

 light line of pale olive usually with a yellowish finge (212, 262) 

 that is generally but poorly defined above and frequently obsolete 

 posteriorly. On the sides there is another light stripe which is frequently 

 of the same color as the oue along the dorsal band but more 

 offen more greenish or bluish (342). This stripe extends from the 

 Upper margin of the ear to the thigh and is continued behind the 

 hind leg upon the tail. It is generally well defined but is occasio- 

 nally broken up into spots. Below this stripe there is evidence of 

 another from the lower margin of the auricular opening to the 

 hindleg. Altlio occasionally entirely wanting the light markings 

 that indicate the position of this stripe are generally in the form 

 of irregulär spots that not infrequently fuse with those representing 

 the stripe above to form wavy vertical bars. They are only rarely 

 fused longitudinally into a definite stripe, except in very young 

 individuals. The color of these markings is generally about the same 

 as the stripe above (342) but occasionally decidedly yellowish (261). 



The males diflfer from the females in that the light margin 

 along the dorsal band and the upper lateral stripe are absent, 

 except for occasional traces of the latter in the form of a faint 

 stripe or a series of spots, and in having a broad light band in the 

 Space that would lie betw^een these stripes if present. This band is 

 usually greenish blue (361, 362) but occasionally more greenish (317, 

 in one specimen 267 tinged in places with red), extends from the 

 neck to the tail, and is usually complete, only occasionally being 

 broken up into large spots. As in the females there is a series of 

 light spots low on the sides, and these are frequently extended 

 upward and downward, connecting with the spots representing the 

 row above, when present, and with those on the sides of the belly 

 to form vertical bars, These markings are generally greenish blue 

 like those above, but they may be more yellowish (202). In old 

 males the chin and throat are frequently bright yellow (202, 236) 

 or bright reddish orange (86). In one specimen they are slate (372), 



