SYNOPSES AND DESCRIPTIONS. 67 



thus reducing the red color to vertical bars on the flank. (Ventrals 183 

 in a Utah specimen before me.) Hab. Colorado and Utah. 



A^ar: ZONATUS. 



Fusiform, round ; head small, scarcely distinct from the neck, depressed, 

 rounded, crown slightly convex; tail short, stout to near the end. Eye 

 small, pupil round. Muzzle narrow, rounded. Mouth-cleft nearly straight. 

 Teeth equal, smooth. Head-shields short, broad. Rostral broad, low, con- 

 vex. Internasals and prefrontals much broader than long. Frontal nearly 

 as broad as long, posterior angle obtuse. Nasal in two parts, nostril be- 

 tween. Loreal very small. One anteocular, nearly as long as high. Post- 

 oculars two, lower small. Temporals 2 f 2. Labials seven, eye over third 

 and fourth, fifth and sixth large. Infralabials eight, fifth large. Submen- 

 tals two pairs, posterior half as large as the anterior. Scales short, broad, 

 in 21 rows, outer broader than long. Ventrals 213, broad. Anal entire. 

 Subcaudals 51 paii's. 



Red. Each scale black-tipped. Head black to the temple. Surrounded 

 by a yellow ring across the hinder portion of the parietals ; behind this a 

 complete black ring of equal width — about four scales — touches the angle 

 of the mouth. Body with seventeen pairs of narrow black rings — 14th on 

 the vent — confluent on the belly, but including a yellow space of their own 

 width three to four scales on the back, and separated from each other pair 

 by a red space about as broad as that occupied by the pair and included 

 space. Acapulco, Mexico. 



O. GETULUS var. pyromelanus. 



Head distinct from the neck, muzzle contracted; tail five and one half 

 times in the total. Crown-shields nine. Frontal broad. Posterior sub- 

 mentals half as long as the anterior. Dorsal scales in 23 rows, rather 

 broad, outer not abruptly enlarged. Ventrals 224. Anal one, Sub- 

 caudals 66 pairs. 



Ground color ochraceous white. Fifty to fifty-eight black annuli, on the 

 anterior portion of the body each is split by a vcrmillion annulus, poste- 

 riorly the division is incomplete, all extending with irregularities on the 

 belly. In one specimen all the black annuli to the middle of the tail are 

 divided by the red, leaving the black as a margin to it; they are four 

 scales wide behind the middle of the body. In another only four anterior 



