542. VIPEEID^. 



8. Lachesis neuwiedii. 



Bothrops neuwiedi, Wagl, in Spix, Serp. Bras. p. 56, pi. xxii. fig. 1 



(1824) ; Jan, Areh.f. Nat. 1859, p. 275. 



leucurus, Wagl. I. c. fig. 2. 



Trigonooephaius neuwiedii, Jan, Rev. ^ Mag. Zool. 1859, p. 154. 

 Bothrops diporua, Cope, Proc. Ac. Philad. 1862, p. 347 ; Boettg. 



Zeztsckr. ges. Naturw. Iviii. 1886, p. 239 ; Boukng. Ann. ^ Mag. 



N. S. (5) xviii. 1886, p. 438. 



atrox, part., Hensel, Arch. f. Nat. 1868, p. 334. 



Trigonocephalus (Bothrops) pubescens, Cope, Proc. Amer. Philos. Soc. 



xi. 1869, p. 157. 

 Bothrops urutu, Lacerda, Lee. Ven, Serp. Br4s. p. 11, pi. i. (1884). 

 atrox meridionalis, F. Mull. Verh. Nat. Ges. Basel, vii. 1885, 



p. 699. 



Snout obtusely pointed, witli strong, slightly raised canthus. 

 Rostral as deep as broad ; nasal divided ; upper head-scales small, 

 imbricate, strongly keeled, largest on the snout ; supraocular large, 

 separated from its fellow by 6 to 9 longitudinal series of scales ; 

 internasals large and in contact with each other ; a large canthal ; 

 two or three postoculars and a subocular, which is separated from 

 the labials by two or three series of scales ; loreal pit separated 

 from the labials ; temporal scales keeled ; 8 or 9 upper labials. 

 Scales very strongly keeled, in 21-27 rows. Ventrals 168-182 ; 

 anal entire ; subcaudals 41-53. Yellowish or pale brown above, 

 with dark brown, black-edged spots ; the spots on the back forming 

 a single series or a double alternating series; a lateral series of 

 small spots ; a dark spot on the snout, a pair of dark bands from 

 the vertex to the nape, and another from the eye to the angle of the 

 mouth ; all these markings may have a fine yellow edge ; yellowish 

 beneath, more or less profusely dotted or powdered with brown and 

 largely spotted on the sides. 



Total length 770 millim. ; tail 120. 



Brazil, Paraguay, Argentina. 



a-b, c-f. (3 (Sc. 25, 25; S.Lorenzo, Rio Grande Dr.H.v. IheringfO.]. 



V. 171, 176 ; 0. 60, 60), do Sul. 



$ (Sc. 25; V. 169; C. 



47), & yg. (Sc. 26, 25, 



27; V. 173, 182, 170; 



C. 42, 43, 49). 

 g-7i. 2 (Sc. 25 ; v. 177 ; Asuncion, Paraguay. Dr. J. Bohls [C.l. 



C. 41) & hgr. (Sc. 27 ; 



V. 179; 0.47). 

 ir-h. S (Sc. 21; V. 174; Paraguay. 



C. 53) & 2 (So. 25; 



V. 177; 0.41). 

 /. S (Sc, 25 ; V. 176 ; Oordoha. E. W. "White, Esq. 



0. 47). [C.]. 



