46 SYNOPSES AND DESCRIPTIONS. 
broader than the frontal posteriorly. Temporals 1+2. Labials eight, 
fourth and fifth in the orbit. Infralabials ten, fifth largest. Submentals 
two pairs, elongate. Scales smooth, in 17 rows, dorsal with two pores, 
narrow, outer twice as broad, Ventrals 203. Anal bifid. Subcaudals 
96 pairs. 
Olive-tinted greenish-brown above; a yellow black-edged band one and 
two half scales in width along the middle of the back. A blackish line 
on the ends of the ventrals and edge of the outer row. Above the dark 
edges a light space on the outer row extends along body and tail as a 
light line. A yellow cross band on the hinder extremity of the pre- 
frontals, the ante and postoculars. The greater part of the supralabials 
and ventral surface yellow. Mexico. 
CoLUBER TAENIATUS. 
Lepropuis TAENIATA [Tallowell, 1852, Proc. Ac. N. Se., Phil., 181. 
Very long and slender; head distinct from the neck, elongate, narrow, 
subquadrangular in transverse section, crown flattened, sides concave in 
front of the eye; tail slender, long, one third of the total. Snout promi- 
nent. Mouth-cleft deep, outline curved. Teeth equal, smooth. Eye 
large, pupil round. Crown-shields nine, large, long. Rostral bent back 
in a blunt angle between the internasals. Prefrontals broad, bent down- 
ward at the sides. Frontal broad anteriorly, contracted in the middle. 
Supraciliaries long, broad, prominent, convex. Nasal divided, nostril 
between. Loreal longer than high. Preoculars two; lower very small, 
in a notch between the third and fourth labials; upper produced above 
the loreal, sometimes reaching the vertical. Postoculars two, lower on 
the fifth labial. Two temporals in contact with the orbitals. Labials 
eight, seventh largest. Infralabials ten, fifth largest. Submentals two 
pairs, the hinder longer. Seales smooth, lozenge-shaped, truncate at the 
end, in 15 rows, outer broad. Ventrals 209. Anal bifid. Subcaudals 
135—157 pairs. 
A narrow longitudinal line of brown or black in the middle of each row 
of scales. A dorsal band of brown about seven scales in width obscures 
those of the medial rows; those on several of the outer rows are black. 
At the upper edge of each flank there is a narrow band about one scale 
in width of orange or red. The longitudinal lines on the outer rows are 
more or less distinctly separated by spaces of orange. A rather indistinct 
