REPTILES OP THE TRES MARIAS ISLANDS. 



71 



Agkistrodoii bilineatus (Giinther). 



Scale rows, 23 ; ventrals, 138; anal, 1; caudals, 21 + ff-. Adult male. 

 Southern Mexico and Central America to Nicaragua. 



Lit of 



of .Igkiatrodon bilineatux. 



May 15, 1897 



Crotalus sp. ? 



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

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

 a rattler on Maria Magdalena Island. 



