138 COLUBRID. 
Natrix semilineata, Wagl. in Spix, Serp. Bras. p. 38, pl. xi. fig. 2 
(1824). 
Coronella regine, part., Schleg. Phys. Serp. ii. p. 61 (1837). 
Liophis regine, part., Dum. § Bubr. vii. p. 704 (1854) ; Jan, Arch. 
Zool. Anat. Phys. ii. 1863, p. 293, and Icon. Gén. 16, pl. vi. fig. 1 
(1866). 
regine, Giinth. Cat. p. 46 (1858). 
— teniurus (non Tsch.), Giinth. 1. c. pp. 46, 246. 
merremii, part., Giinth. l. e. p. 44. 
—— regine, var. ornata, Jan, ll, cc. 18, pl. il. fig. 2. 
Eye rather large; snout short. Rostral broader than deep, 
visible from above; internasals broader than long, shorter than the 
prefrontals; frontal once and two thirds to twice as long as broad, 
much longer than its distance from the end of the snout, as long as 
the parietals or slightly shorter; loreal deeper than long; one pre- 
and two postoculars; temporals 1+2; eight upper labials, fourth 
and fifth entering the eye; five lower labials in contact with the 
anterior chin-shields, which are as long as or a little longer than th 
posterior. Scales in 17 rows. Ventrals 136-150; anal divided ; 
subeaudals 58-81. Length of tail 3 to 4 times in the total length. 
Olive or greenish above, which colour extends to the ends of the 
ventrals ; usually, each scale edged with black, forming a reticulate 
pattern; a more or less distinct black streak along each side of the 
tail; upper lip yellow; young with a yellowish collar and an 
oblique yellowish, black-edged band .on each side of the head, from 
the parietal shield to the last upper labial ; traces of these markings 
are usually to be found in the adult; belly yellowish, usually with 
black spots. 
Total length 650 millim.; tail 165. 
Tropical South America. 
a. 3 (V.139; C. 78). Trinidad. J. H. Hart, Esq. [P.] 
b, c-g, h,t. §(V. 189,144, Demerara. 
141,140; C. 72, 71,?,?), 
Q (V. 144, 140, 139; 
C. ?, 74, 76), & yg. (V. 
k-m, n. 3 (V. 148; C.77) Berbice. 
& 2 (V.144, 146, 141; 
C. 72, 68, ?). 
o-p. d (V. 148; C.71)& Para. 
(V. 140; C. 74). 
Ged (V.,145-0. ?). Para, R. Graham, Esq. [P.]. 
rs. 3 (V. 149, 188; C. Bahia. Dr. O. Wucherer 
80, 62). [C.]. 
t,u. 2 (141,141; C.70, Moyobamba, N.E. Mr. A. H. Roff [C.]. 
58). Peru. 
v. 9 (V. 144; C. 72). Sarayacu, N.E. Peru. Mr. W. Davis [C.]; 
Messrs. Veitch [P.]. 
w-«. 9 (V. 148; C.?) & Guayaquil. Mz. Fraser [C.]. 
yg. (V. 142; C. 71). 
y. 2 (V..140;. C. 76). S. America, 
go (V. 189; OC. 76). —? (Type of C. graphicus.) 
