NORTH AMERICAN BATRAC1IIA AND RECTI LI A. 
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11. Genus Diadophis, B and G. 
Nasals two; loral present; postorbitals two ; anteorbitals 
two, rarely equal in size; dorsal scales smooth, anal divided; eye 
large ; head depressed ; unicolor, with generally a light ring on 
the occipital region. 
A. Dorsal rows 15. 
29. JD. punctatus , subsp. punctatus , (Linn.) Cope. Ring- 
necked Snake. Eye over fourth and fifth upper labials ; body 
above bluish-black ; beneath yellowish-orange, with a series of 
sub-triangular spots along sides of scutellse, and sometimes a 
similar medial series; tail beneath unicolor; eight upper labials 
and chin yellowish ; a yellowish- white occipital ring, about two 
scales wide; G. 140-160. United States and Canada, east of 
the plains, and Texas. 
30. D. punctatus , subsp. amabilis , (B. and G.) Cope. 
Eye over third and fourth upper labials; above blackish-brown; 
beneath yellowish-white, with crowded small black spots from 
head to end of tail; the seven upper labials and chin blackish- 
brown; occipital ring narrow; scales on sides considerably 
larger than those on back; G. 180-185. Western United 
States, east to Ohio. 
B. Dorsal rows 17. 
31. D.arnyi, Kenn. Color above uniform leaden-black; be- 
neath yellow, spotted thickly and irregularly with black; the 
spots on under part of neck smaller; occipital ring light yellow, 
narrow, one and two half scales wide. Illinois and Kansas. 
12. Genus Dromicus, Bibron. 
Posterior maxillary tooth largest, not grooved, separated by 
an interspace from the rest; nasals two; lqral rarely wanting; 
postorbitals two; dorsal scales rather Short, rarely slightly cari- 
nate ; generally in 17 or 19, exceptionally in 15 or 23 rows ; 
anal divided ; eye moderate. 
32. D. Jlavilatus , Cope. Nostril in the prenasal; color 
above golden brown ; the two lower rows of scales gold-edged ; 
color of back commencing on the third row of scales ; vertebral 
row sometimes darker tipped ; below whitish ; dorsal rows 17 ; 
G. 126. Coast of North Carolina. 
13. Genus Cyclophis, Gunther. 
Teeth equal, smooth; snout protruding; loral one, occasion- 
ally wanting; postorbitals two; dorsal scales smooth or carinate; 
anal divided ; eye large. 
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