89. HYPSIGLENA. 209 
subequal. Head distinct from neck; eye rather small, with verti- 
cally elliptic pupil. Body cylindrical; scales smooth, with apical 
pits, in 19 or 21 rows; ventrals rounded. ‘Tail moderate; sub- 
caudals in two rows. 
Southern parts of North America, Central America, Venezuela. 
Synopsis of the Species. 
I. Subeaudals 39-55. 
A. Scales in 21 rows; usually a subocular below the prxocular. 
Rostral once and a half as broad as 
deep, the portion visible from above 
nearly half as long as its~ distance 
COAT TERS oC) C1 ee Oar a, Ba 1. ochrorhynchus, p. 209. 
Rostral nearly twice as broad as deep, 
the portion visible from above one 
fourth to one third its distance from 
ERBPNOMGH.. aisle taunt. eee Che cise 2. torquata, p. 210. 
B. Scales in 19 rows; nosubocular.. 3. affints, p. 210. 
II. Subcaudals 80-93. 
Seales mel OwOws.. 0 csrahieee oi -< + 3 e's 4. discolor, p. 211. 
Scales in 21 rows; body cylindrical .. 5. latifasciata, p. 211. 
Scales in 21 rows; body feebly com- 
PROGS CM eee eA cag ican tiers "Saciey Wace ses) coe 6. ornata, p. 211. 
1. Hypsiglena ochrorhynchus. 
Hypsiglena ochrorhyncha, Cope, Proc. Ac. Philad. 1860, p. 246; 
Garm. N. Am. Rept. p. 80 (1883); Cope, Proc. U.S. Nat. Mus. 
xiv. 1892, p. 617; Stejneger, N. Am. Faun. no. 7, pt. ii. p. 204 
(1893). 
chlorophzea, Cope, Proc. Ac. Philad. 1860, p. 246 ; Stejneger, 1. e. 
texana, Stejneger, l. c. p. 205. 
torquata, var., Giinth. Biol. C.-Am., Rept. p. 137 (1894). 
Snout conical, prominent. MRostral once and a half as broad as 
deep, the portion visible from above nearly half as long as its dis- 
tance from the frontal; internasals shorter than the prexfrontals ; 
frontal once and one third to once and a half as long as broad, as 
long as or a little longer than its distance from the end of the snout, 
much shorter than the parietals; loreal longer than deep; one 
preocular, usually with a subocular below it; two postoculars ; 
‘temporals 1+2; eight upper labials, fourth and fifth entering the 
eye: four or five lower labials in contact with the anterior chin- 
shields, which are as long as or a little shorter than the posterior. 
Seales in 21 rows. Ventrals 167-175; anal divided; subcaudals 
41-55. Grey or pale buff above, with a dorsal series of large 
transverse dark brown or blackish spots and two alternating series 
of smaller spots on each side; three elongate dark blotches on the 
nape, the lateral ones produced forwards as a lateral streak, which 
passes through the eye and is white-edged beneath ; upper surface 
VOL. Il. P 
