116 COLUBEID^. 7 .^ ' , ^Xs'ii'^^^ - 



^ 1. Thamnodynastes nattererir 



Coluber nattereri, Mikan, Belect. Faun. Flor. Bras. pi. — . fig. 1 



(1820) ; Wied, Beitr. Nat. Bras. i. p. 277 (1825), and Albild. 



(1830). 

 Tropidonotusjiattereri, Bote, Isis, 1827, p. 635. 

 Dipsas nattereri, Schleg. Phys. Serp. ii. p. 290 (1837) ; Bum. Sf Bibr. 



Tii. p. 1149 (1854). 

 Thamnodynastes nattereri, Ounth. Cat. p. 164 (1858) ; Jan, Icon. 



Qin. 39, pi. ii. fig. 3 (1872) ; Boettg. Zdtschr. f. Naturw. Iviii, 



1885, p. 236. 

 Tomodon strigatus, Ounth. I. c. p. 52. 

 Tachymenis hypoconia, Cope, Proc. Ac. Philad. 1860, p. 247 ; Cfimth. 



Zool. Sec. 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. 06n. 18, pi. vi. fig. 1 (1866). 

 Thamnodynastes punctatissimus [non Wagl.), Hensel, Arch. f. Nat. 



1868, p. 332. 

 nattereri, var. IseTis, Bouleng. Ann. Sr Mag. N. H. (5) xv. 



1885, p. 195. 



strigatus, Bouleng. Ann. Sf Mag. N. H. (5) xviii. 1886, p. 437. 



Tachymenis strigatus. Cope, Proc. Amer. Philos. Soc. xxiv. 1887, p. 58, 



Snout short, convex. Eostral broader than deep, just visible 

 from above; intemasals as long as or a little shorter than the 

 prsefrontals ; 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 long ; one prseocular (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. Yentrals 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 miUim. ; tail 170. 



South America east of the Andes. 



A. Scales strongly keeled. 



a. (? (V. 153 ; C. 77). Santarem. H. W. Bates, Esq. [0.]. 



b, c. S (V. 160, 143 ; Tijuca K. K. Bennett, Esq.TP.l. 

 C. 78, 78). 



d-e. 2 (V. 144, 142 ; Rio Grande do Sul. Dr. H. v. Ihering [0.1 



0.63,59). 



/. $ (V. 145; 0. 70). Brazil. Capt. J. Parish [P.]. 



g~h. (? (V. 146, 145; Uruguay. 



C. 72, 75). 



i. S skeleton. Uruguay. 



