REPTILES OF THE TRES MARIAS ISLANDS. 



71 



Agkistrodon bilineatus (Giinther). 



Scale rows, 23; veutrals, 138; anal, 1; caudals, 21 + |f . Adult uiale. 

 Southern Mexico and Central America to Nicaragua. 



List of specimens of AgMsirodon hilineatns. 



Crotalus ap. t 



No rattlesnake was collected on the Tres Marias by Funer, nor by 

 Nelson, but the latter informs me that he was told of the occurrence of 

 a rattler on Maria Magdaleiia Island. 



