157. TACHYMENIS. 117 



B, Scales moderately keeled. 



a, b~c. J (V. 151 ; C. 73) Rio Janeiro. Mrs. Fry [P.l. 



& $ (V. 150, 143 ; 



C. 67, 59). 

 d^e. (J (V. 145 ; 0. 65) Asuncion, Paraguay. Dr. J. Bohls [0.1 



&ligr.(V. 139; 0.56). 



1 C. Scales faintly keeled." 



a-c. Hgr. (V. 152, 138, Demerara. Dr. Hancock fP.l. 



■ 141; 0.70,60,60). 



d,e. S (V. 165; 0. 78) Rio Janeiro. A. Fry, Esq. [P.]. 



& S (V.148; 0.69). 

 /. 9 (V. 154 ; 0. 69). Brazil. Dr. Gardner [P.]. 



D. Scales smooth. 



a. $ (V. 144 ; 0. 48). Aracati, N. Brazil. D. G. Rutherford, Esq. 



• ■ [P-]- 



h, c-d. c? (V. .139, 143 ; Rio Grande do Sul. Dr. H. v. Ihering [0.]. 



0.?, 63) & hgr. (V. 



136 ; 0. 62). 

 e. $ (V. 133 ; 0. 66). ? (Type of Tomodon strigatus.) 



2. Thamnodynastes punctati n aimTM ft- Js^U^d-*^ ^ 



Natriz punctatissima, Wagl. in Spix, Serp. Bras, p. Z2, pi. xiv. fig. 1 A*--^ 



Dipsas punctatissima, Schleg. Phys. Serp. ii. p. 292, pi. xi. figs. 33 & 34 



(.18.37); Dum. 8,- Bibr. vii. p. 1151 (1854). 

 Sibon punctatissimus, Berthold, Abh. Oes. Wiss. Ootting. i. 1843, 



p. 68, pi. i. figs. 13 & 14. 

 Thamnodynastes punctatissimus, Oiinth. Cat. p. 164 (1858) ; Jan, 



Icon. Gen. 39, pi. ii. fig. 2 (1872). 



Very closely allied to the preceding, but body more slender, eye 

 larger, rostral but little broader than deep, scales smooth, in 17 rows, 

 and anal entire. Ventrals 137-159 ; subcaudals 80-96. 



Total length 550 millim. ; tail 150. 



Guianas, Brazil. 



a. cJ (V. 159; 0. 88). Demerara. Mr. W. T. Turner [0.]. 



i. d (V. 144 ; 0. ?). Upper Amazon. Mr. E. Bartlett [0.]. 



c. $ (V. 146; 0.80). ? 



157. TACHYMENIS. 



Tachymenis, Wiegm. N. Act. Ac. Leop.-Carol. xvii. i. 1836, p. 261. 

 Coronella, part., Schleg. Pkgs. Serp. ii. p. 50 (1837). 

 Dipsas, part., JDum. ^ Bibr. Mrp. Gen. -vii. p. 1133 (1854), 

 Tachymenis, part., Giinth. Cat. Col. Sn. p. 33 (1858). 

 Mesotes, part., Jan, Arch. Zool. Anat. Phys. ii. 1863, p. 306. 

 Psammophylax, part., Jan, I. c. p. 309. 



Maxillary teeth subequal, 10 to 15, followed, after an interspace, 

 hy a pair of large grooved fangs situated below the posterior border 

 of the eye ; anterior mandibular teeth longest. Head scarcely 



