15 
CROTALIDAE. 
35. (20). Ancistrodon contortrix, Linnaeus. 
Copperhead; Deaf adder. 
Agkistrodon contortrix, Baird and Girard. 
Boa contortrix, Linnaeus. 
A gkistrodon mokeson, Pal. de Beauvots. 
Cenchris mokeson, Daudin, Harlan. 
Scytalus cupreis, Katinesque, Harlan. 
Trigonocephaius cenchris, Schlegel. 
Trigonocephalus contortrix, Holbrook, Dumeril and Bibron. 
Ancistrodon contoririx, Baird, Cope. 
Length 30 to 4o inches. General color above light chest- 
nut; a series of darker, inverted Y-shaped blotches on each 
side. Beneath dull yellowish with a series of large dark 
blotches on each side. Forehead with larger scales than those 
of neck ; poisonous fang teeth in upper jaw; no rattles, tail end- 
ing in horny point. 
Fields and meadows. 
Recorded in Mass. and Conn. and R. I. 
30. (21). Crotalus horridus, Linnaeus. 
Banded rattlesnake. 
Crotalus durissus, Latreille, Daudin, Harlan, Schlegel, Storer, 
Holbrook, DeKay, Leconte, Baird and Girard, Dumeril 
and Bibron., 
Crotalus atricaudatus, Latreille, Wagner, Gray. 
Crocrotalon durissus, Fitzinger. 
Urosophus durissus, Gray. 
Crotalus horridus, Shaw, Cuvier, Gray, Guerin, Griffeth, Le- 
conte, Cope. 
Length 4 to 5 feet. Color above varies from yellowish 
tawny to dark brown; a series of brown or black spots on each 
side of mid-dorsal line, more or less confluent, forming zigzag 
cross bands. Beneath, color varies from whitish yellow to 
black gray. Body stout; head broad and triangular; upper 
jaw with two large fang teeth. Scales of forehead not larger 
than those of back; last joints of tail horny and flat, forming 
rattles. 
Rocky, wooded regions. 
Recorded in R. I. from Tiverton, Foster and “Rattlesnake 
Dens Ge 
R. W. P. Coll., two specimens. 
