310 Alexander G. Rltthven, 



La Laja Creek, on the flood piain of the San Juan River and about 

 the sliores of Lake Catemaco. 



JRhinophrynus äorsalis Dümeeil et Bibron. 



Two specimens were taken from the stomach of a specimen of 

 Spüotes corais couperii at Cuatotolapam. 



Only one of the specimens obtained is in good condition. In 

 this one the light markings consist of a vertebral line (interrupted 

 on the middle of the back and in several places on the head), a large 

 spot over each Shoulder and several obscure ones on the sides of the 

 back. These light markings were all of a bright pink color when 

 the animal was removed from the snake. 



The specimens referred to above were the only ones observed. 

 They were probably captui-ed by the snake in or about the pond in 

 the cane fields where the latter was taken. The snake was found 

 on the margin of the pond on the raorning following a heavy night 

 rain, and large numbers of toads and tree toads were breeding there 

 at the time. This species is undoubtedly a burrower. and probablj' 

 came out at this time to breed, as the various species of Scaphiopus 

 do under similar conditions, 



Hula bcmdini Dumekil et Bibron. 



Common at Cuatotolapam. 



There was much Variation in color in the specimens of H. haudini 

 which we examined in life. Occasional individuals were a duU orange 

 (about 153d) above, but in by far the greater majority the ground 

 color of the back was dark olive green (230), dark olive (180), dark 

 brown (130 or 155) or dark orange (105). The head was a shade 

 lighter than the ground color in most specimens, and the pale spot 

 varied from a pale dull greenish tint (203d) to a very pale yellow (221) 

 or bright green (336). The belly was nearly always a light orange 

 tint (116, 121, 136), and the light spots on the sides light orange 

 yellow (191). The dark markings vary greatly in distinctness. In 

 the paler individuals they are usually indistinct or even entirely 

 wanting, except for faint traces. In those which have a darker 

 ground color they are usually distinct, particularly the black stripe 

 from the tympanic region to the Shoulder. They also vary in 

 arrangement, for they may either be connected into a more or less 

 Irregulär dorsal stripe or stripes, beginning with the cross band 



