The following analytical table will be found. to contain, in a 

 condensed form, a key to tbe subsequent classification of genera. 



SYNOPSIS OP FAMILIES AND GBNEEA. 

 Family I : CaoTALiDJE. Erectible poison fangs, in front ; few teeth in 

 upper jaw ; a deep pit on side of face, between tlie eye and 

 nostril. 



Family II : CoLrBRiD^. No pit nor poison fangs ; both jaws fully pro- 

 vided with teeth ; no anal appendages. 



FAMILY I : CEOTALID^. 



rr -1 -fh fti ( with small scale-like plates, .CuoTALrs. 



Tod oThead covered ] ^'^^ '^'^^e plates arranged as 



iop ot neaa coverea. . . ^ j^^ Coluber .-. Crotalgphokus. 



Tail without a rattle AnOisIeodon. 



FAMILY II : COLUBEID^. 



p. 



Hi 



a 



c3 es 



'h-p 





f entire Eut^kia. 



Three. Postabdominal scutellae i 



( divided Nekodia. 



(two Regika. 



Two. Anteorbitals 2 



(one ScoTOPHis. 



Numerous. Lahials not in orbit Heterodok. 



'entire Ophiboltjs. 



a g Divided, f Long, narrow. Lower anteorhital minute. Basoaniok. 



Vertical i Cone Chloeosoma. 



plate Broad, short. Nasal . . ■? 



I (two DiADOPeia, 



Anteoebitals absent. Scales smooth Ceiota. 



Loral absent. Scales carinated Stoeeria. 



I shall now proceed to give a brief description of the genera 

 -and species of serpents inhabiting New- York, with some general 

 iremarks upon each. 



