64 SYNOPSES AND DESCRIPTIONS. 
OPHIBOLUS. 
Baird & Girard, 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. Seales 
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, pl. V, jig. 2. 
CoLuBEeR DoLIATUS Linn., 1766, Syst. I, 379. 3 
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 Supraciliaries 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 1+2. Labials seven, 
hinder three large and wedged by the temporals. Infralabials eight, fifth 
large, 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. 
