64 synopses and descriptions. 



Ophibolus. 



Baird cf- Qirard, 1853. 



Body moderate to stout, rounded; head medium to small, little larger 

 than the neck, muzzle short, rounded, crown flat. Eye medium, pupil 

 round. Maxillary teeth compressed, posterior larger, smooth, not isolated. 

 Nasal in two parts, nostril between, rarely but one nasal. Loreal gener- 

 ally present. One anteocular. Two, sometimes three postoculars. Scales 

 smooth, short, broad, in 17 to 23 rows. Anal entire. Subcaudals in two 

 rows. 



Loreal present or absent ; 



scales in 19 rows; red, with pairs of black rings separated by white 

 or yellowish ; 



ventrals 169 to 176 doliatus. 



Loreal present; 



scales in 21 to 25 rows ; 



colors red, brown, or greyish, to very dark and yellowish; 



ventrals 180 to 224 triangulus. 



black or brown, with yellowish markings, to whitish or yellowish, 

 marked with dark getulus. 



Ophibolus doliatus, pi. V, Jig. 2. 



Coluber doliatus Linn., 1766, Syst. I, 379. 



Long, slender, subcylindrical ; head little larger than the neck, crown 

 slightly convex, narrow forward, snout prominent; tail short, about one 

 seventh of the total, thick, tapering to a point. Eye small, over the third 

 and fourth, labials, pupil round. Mouth-cleft medium, curved. Crown- 

 shields nine, broad. Frontal broad, short Supi'aciliaries and internasals 

 small. Prefrontals bent down on the side, frequently united with the 

 loreal. Nasal in two parts, nostril between. Loreal present or absent, 

 sometimes present on one side and absent on the other as in the speci- 

 men figured. Oculars 1 — 2, lower small. Temporals 14-2. Labials seven, 

 hinder three large and wedged by the temporals. Infralabials eight, fifth 

 lai'ge, second and posterior small. Submentals two pairs, hinder smaller. 

 Scales smooth, subhexangular, rounded at the extremity in 19 (17 — 19) 

 rows, broadening toward the outer, which is as broad as long. Ventrals 

 large, 169 — 176. Anal entire. Subcaudals 31 — 43 pairs. 



