NORTH AMKRICAN IJATRACIIIA AND RKl'TILIA. 33 



19. C. irygiva^ Cope. Postorbitals two; color ubove black, 

 with faint pale lines along the center of each scale on several 

 Literal rows; beneath yellowish; tail reddish; dorsal rows 17; U. 

 118-122. Florida. 



8. Genus Cemophora, Cope. 



Dentition isodont; rostral acute, produced forward, causing a 

 shar])lj pointed snout; nasals one or two; loral one; anteorbital 

 one; postorbitals two; superciliaries small; dorsal scales smooth; 

 anal entire; eye small; head subcorneal, continuous with body. 



20. C. Goccinea^ Blumenbach. Su])erciliaries very nari-ow; 

 upper labials six; body yellowish-red (crimson in life), crossed 

 by from 20 to 26 black rings, enclosing yellow ones; beneath 

 uniform yellowish-white; dorsal rows 19; G. 160-170. Austro- 

 riparian region. 



9.' Genus Osckola, B. and G. 



Nasals two; loral absent; postfrontals very large, touching 

 upper labials; anteorbital one; postorbitals two; dorsal' scales 

 smooth; anal entire; eye large; head distinct from slender body. 

 ■21. O. elapsoidea, (Ilolb.) B. and G. Scarlet Snake. Post- 

 orbital large, and extending to second upper labial; rostral very 

 broad; ground color bright red, fading beneath, annulated by 

 about 18 pairs of jet black rings, each enclosing a white one; the 

 black rings tapering on the sides, the white ones widening; head 

 red, maculated with black; a yellow collar on upper part of neck, 

 bordered by black lines; dorsal rows 19; G. 175-180. Virginia 

 to Florida; Illinois. 



10. Genus Ophibolus, B. and G. 



Nasals two; loral present; anteorbital one; postorbitals 

 two; superciliaries moderate; dorsal scales smootii, scarcely 

 overlapping; anal entire; head depressed; body rather thick; 

 tail short; ej'es small. 



A. Dorsal rows 21. 



a. Predominating color black. 



22. O. getulus, subsp. getidus, (Linn.) Cope. Chain Snake. 

 A series of large black blotches along middle of back, and another 

 on each«side; these are separated from one another by narrow, 

 continuous, yellow lines; abdomen with central black blotches, 

 which are usually confluent with those on sides; G. 210-225. 

 East of Alleghanies, from Maryland to Florida and Louisiana, 



