The following was tossed together from the DEC Herp Atlas maps at

http://www.dec.state.ny.us/website/dfwmr/wildlife/herp/snakliza.html

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        CHECKLIST OF THE SNAKES (AND LIZARDS?) 
              OF THE CAYUGA LAKE BASIN
       (NY State list - 'x' for basin species)
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Snakes:  
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x  Northern Watersnake  (Nerodia sipedon sipedon)
   Queen Snake          (Regina septemvittata)
x  Northern Brown Snake (Storeria d. dekayi)
x  Northern Redbellied Snake (Storeria o. occipitomaculata)
x  Common Garter Snake  (Thamnophis sirtalis)
   Shorthead Garter Snake (Thamnophis brachystoma)
x  Eastern Ribbon Snake (Thamnophis sauritus)
   Eastern Hognose Snake (Heterodon platirhinos)
x  Northern Ringneck Snake (Diadophis punctatus edwardsii)
   Eastern Worm Snake (Carphophis a. amoenus)
   Northern Black Racer (Coluber c. constrictor)
x  Smooth Green Snake (Liochlorophis vernalis)
x  Black Rat Snake (Elaphe o. obsoleta)
x  Eastern Milk Snake (Lampropeltis t. triangulum)
   Northern Copperhead (Agkistrodon contortrix mokasen)
   Eastern Massasauga (Sistrurus c. catenatus)
x  Timber Rattlesnake (Crotalus horridus)

Lizards:
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   Northern Fence Lizard (Sceloporus undulatus hyacinthinus)
   Italian Wall Lizard (Podarcis sicula)
   Five-lined Skink (Eumeces fasciatus)
?  Northern Coal Skink (Eumeces a. anthracinus)