116 | COLUBRID. 
1, Thamnodynastes nattereri. 
Coluber nattereri, Mikan, Delect. Fawn. Flor. Bras. pl. —. fig. 1 
250) ; Wied, Beitr. Nat. Bras, i. p. 277 (1825), and Abbild, 
Tropidonotus nattereri, Bote, Isis, 1827, p. 535. 
Dipsas nattereri, Schleg. Phys. Serp. ii. p. 290 (1837) ; Dum. §& Bibr. 
vii. p. 1149 (1854). 
Thamnodynastes nattereri, Giinth. Cat. p. 164 (1858); Jan, Icon. 
pes 30, pl ii. fig. 3 (1872); Boettg. Zeitschr. f. Naturw. \iii- 
885, p. . 
P 
Tomodon strigatus, Giinth. 1. c. p. 52. 
Tachymenis hypoconia, Cope, Proc, Ac. Philad. 1860, beet Giinth. 
Zool. Rec, 1866, p. 126; Cope, Proc. Amer. Philos, Soc. xxii. 1885, 
p. 192. 
Mesotes obtrusus, Jan, Arch, Zool. Anat. Phys. ii. 1863, p. 306, and 
Icon. Gén. 18, pl. vi. fig. 1 (1866). 
Thamnodynastes punctatissimus (non Wagl.), Hensel, Arch. f. Nat. 
1868, p. 332. 
—— nattereri, var. levis, Bouleng. Ann. §& Mag. N. H. (5) xv. 
1885, p. 195. 
—— strigatus, Bouleng. Ann. § Mag. N. H. (5) xviii. 1886, p. 487. 
Tachymenis strigatus, Cope, Proc. Amer. Philos. Soc. xxiv. 1887, p. 58. 
Snout short, convex. Rostral broader than deep, just visible 
from above; internasals as long as or a little shorter than the 
prefrontals; frontal once and two thirds to twice as long as broad, 
longer than its distance from the end of the snout, as long as or a 
little shorter than the parietals ; nasal entire or semidivided; loreal 
as long as deep or deeper than Jong; one preocular (sometimes 
divided), not reaching the frontal; two postoculars; temporals 
2+2 or 3; eight (rarely seven or nine) upper labials, two or three 
of which enter the eye; four or five lower labials in contact with 
the anterior chin-shields, which are as long as or a little longer 
than the posterior. Scales in 19 rows, smooth or more or less 
strongly keeled. Ventrals 137-160; anal divided; subcaudals 
48-78. Brown or olive above, spotted or striped with darker; a 
yellowish vertebral stripe or series of spots may be present; head 
with dark undulous streaks or vermiculations; labial shields some- 
times barred with black; an oblique dark streak from the eye to 
the angle of the mouth; yellowish beneath, speckled and streaked 
with blackish. 
Total length 760 millim,; tail 170. 
South America east of the Andes. 
A. Seales strongly keeled. 
a. d (V.153; 0.77). Santarem. H. W. Bates, Esq. [C.}. 
b, = < os 160, 143; Tijuca R. R. Bennett, tbo 
de, EY wv 144, 142; Rio Grande do Sul. Dr. H. v. Ihering [C.]. 
. 63, 59). 
. 9 (V. 145; C.70). — Brazil. Capt. J. Parish [P.]. 
I 3 (V. 146, 145; Uruguay. : PJ 
C. 72, 75). 
a, 3 skeleton. Uruguay. 
