112. ATRACTUS. 313 
Rhegnops visoninus, Cope, Proc, Ac. Philad. 1866, p. 128. 
—— sareii, Fischer, Jahrb. Hamb. Wiss. Anst. ii. 1885, p. 92. 
Adelphicus sargii, Cope, Bull. U.S. Nat. Mus. no. 32, 1887, p. 85. 
visoninus, Cope, l. ¢. 
Snout obtuse. Rostral small, a little deeper than broad, visible 
from above; prefrentals nearly as long as broad ; frontal nearly as 
broad as long, as long as its distance from the rostral or from the 
tip of the snout, shorter than the parietals ; loreal at least twice as 
long as deep ; two postoculars ; temporals 1+1, rarely 1+2; seven 
upper labials, third and fourth entering the eye; a single pair of 
large chin-shields, separated from the symphysial; in consequence 
of the great width of the chin-shields, the three anterior lower 
lalials are much reduced, very narrow. Scalesin15 rows. Ventrals 
126-144 ; anal divided; subcaudals 25-43. Pale reddish brown 
above, with four or five dark brown or blackish longitudinal lines 
or stripes ; white beneath, with a brown line along the middle of 
the tail, and sometimes also along the belly. 
Total length 365 millim.; tail 55. 
Central America. 
a. 9 (V. 183; C. 35). Mexico. M. Salté [C.]. 
OMe. (WL ES 26; C. 43). Honduras. Mr. Dyson [C.}. 
c. Her. fo) (Vv. J41; C. Guatemala. Stuttgart Mus. [E.]. 
28). (One of the types of R. sargv.) 
d. 2 (V. 144; C. 28). —? 
. Atractus fave. 
- Calamaria fave, Foes Cat. Rag. Serp. Mus. Pavia, p. 16 (1840). 
Rabdosoma longicaudatum, Dum. § Bebr. vii. p. 106 (18: DA); Giinth. 
Cat. p. 12 (1858) ; Jan, ‘Arch. Zool. Anat. Phys. ii. 1862, p. 15, 
and Icon. Gén. 11, pl. i. fig. 2 (1865). 
favee, Jan, Il. cc. p. 16, ‘pL. u. fig. 3. 
Snout rounded. Rostral moderately large, a little broader than 
deep, just visible from above ; internasals small, broader than long ; 
prefrontals broader than long ; frontal as long as broad, as long as 
its distance from the frontal, much shorter than the parietals ; loreal 
nearly twice as long as deep; a small preocular sometimes present, 
above the loreal; two postoculars; temporals 14+2; seven upper 
labials, third and fourth entering the eye; a single pair of 
moderately large chin-shields, in contact with the symphysial and, 
on each side, with three lower labials. Scales in 17 rows. Ventrals 
171-185; anal entire; subcaudals 58-66. ‘Tail long and thick, 
ending in an obtuse point. Brown above, with darker spots and a 
rather indistinct darker vertebral line; yellow (red ?) beneath, with 
large black blotches, which mostly alternate. 
Total length 420 millim.; tail 110. 
Brazil ? 
. 3 ve 73; 0. 58). —— Dr. Gunther [P.}. 
h 2 (Vai72 ; C.°66). Bee 
aa CITY) 
