NORTH AMERICAN BATRAOHIA AND REPTILIA. 
37 
throat, which are yellowish; dorsal rows 27, the seven outer 
smooth; G. 230-235. Eastern United States from Texas to 
Massachusetts. 
39. O. obsoletus , subsp. confinis , B. and G. Color above 
ashy-gray, with a series of about 45 dark chocolate-brown dorsal 
blotches, with indistinct black margins; blotches six or seven 
scales long and eleven wide; two smaller lateral series; beneath 
yellowish, blotched with black; dorsal rows 25, outer six 
smooth, the rest obsoletely carinated; G. 235-240. Austroripa- 
rian region to Missouri ; 8. Illinois. 
40. C. guttatus , Linn. Color above light red, paler on 
sides, with a series of about 45 dark brick -red quadrate dorsal 
blotches, deeply margined with black; two more or less distinct 
series of similar lateral blotches. In some alcoholic specimens 
the blotches are hazel, with lighter intervals ; beneath yellowish- 
white, with sub-quadrate black blotches; dorsal rows 27, very 
obsoletely carinated ; G. 215-235. Austroriparian region to 
Virginia; S. Illinois. 
B. With four longitudinal brown bands. 
41. C. quadrivittatus, Holb. Chicken Snake. Color 
above greenish-yellow, with a brown lateral and dorsal band on 
each side; beneath light straw color; dorsal rows 27, only five 
or eight median ones carinated; G. 230-240. North Carolina 
to Florida. 
15% Genus Spilotes, Wagler. 
Nasals two; loral one, sometimes two; anteorbitals one or 
two; postorbitals two; superciliaries very broad; dorsal scales 
smooth, slightly carinate along the back in some foreign species ; 
anal entire; head deep. 
42. S. couperi , Holb. Postorbitals over the fourth labial ; 
color above black; beneath dark slate; no red markings on 
abdomen; G. 185-187. Georgia. 
43. 8. erebennus ; Cope. Postorbitals over the fifth labial ; 
color above black, with scattered spots of reddish-white at base 
of the scales; beneath slate color, anteriorly with bases of 
scutellse red ; G. about 195. Texas to Alabama. 
16. Genus Pityophis, Holb. 
Vertical elongated, sometimes absent; posterior frontals 
two pairs; loral one; anteorbitals one or two; postorbitals three 
or four; dorsal scales carinate along back, smooth on sides; 
anal entire. 
