88 PROCEEDINGS OF THE ACADEMY OF [Jan., 



nasals; scales smooth, without pits, in 15-21 rows; anal divided; 

 size very small ; head distinct. 



Hab. — North and South America. 



Rhadinea flavilata Cope. 



Dromkns jhivilatus Cope, Proc. Acad. Phila., 1871, p. 322, and I. c, 

 618 ; Liophis -flnvilatns Boul., I. c, II, 143 ; RJiadinea flavilata 

 Cope, Traus. Am. Phil. Soc., XVIII, 203 (1895), and Rep. Nat. 

 Mus., 759. 



Head slightly distinct; maxillary teeth 12-13, the last two 

 enlarged and separated from the others by a slight interval ; man- 

 dibular teeth 17, subequal; head plates normal; loreal obliquely 

 quadrangular; nasal indistinctly divided above and below the 

 nostril; one large preocular; two post-oculars, the lower one small; 

 temporals 1-2; upper labials 7; lower labials 8; posterior chin 

 shields longest and separated behind; scales in 17 rows, smooth, 

 without pits; ventrals 126-129; subcaudals 66-77. 



Length 270 mm. (tail 77). 



Reddish brown above, somewhat lustrous in life, each scale 

 finely dotted with dax'k brown; belly light yellow, invading the 

 edges of the two outer rows of scales; top of head a little darker 

 than the back and indistinctly vermiculated with light brown; a 

 faint dark band from the rostral to the temporals, slightly bordered 

 above with yellow and below with black; labials colored like the 

 ventrals, the upper ones slightly spotted with dark brown. The 

 foregoing description is taken from two living specimens, one from 

 Florida and one from Bay St. Louis, Miss. 



As none of the three examples of this rare snake Avhich I have 

 examined, possess scale pits, it cannot be placed in Liophis, as is 

 done by Boulenger, but falls into the section of Rhadinea with 

 slightly diacranteriau dentition. 



Hab. — North Carolina to Florida and Mississippi. 



HETERODON Latieillc. 



Hist, des Kept., IV., 33 (1800); B. and G., I. c, 51 ; I. c, Cope, 153, 

 and Rep. Nat. 3Ius., 7G0; Boul., I. c, II., 153. 



Posterior maxillary teeth much enlarged, smooth, an interspace; 

 body stout; head long and shghtly distinct; snout short; rostral 

 strongly projecting and recurved ; a small plate behind the rostral ; 

 sometimes a number of small scales separating internasals and pre- 

 frontals; eye surrounded by a circle of scales; 1 loreal; 2 nasals. 



