568 



VIPEEID^. 



i, k-l. Hgr. (Sc. 23; V. 



157 ; 0. 49) & yg. (So. 



25,23; V. 145, 148; C. 



51, 50). 

 m. Hgr. (Sc. 21 ; V. 138 ; 



0. 47). 



n. Hgr. (So. 23; V. 151; 



C. 59). 

 o-p. ? (So. 21 ; V. 140 ; 



C. 58) & hgr. (So. 23; 



V. 140 ; 0. 53). 

 q, r-s. (S (So. 19 ; V. 145 ; 



0. ?) & 2 (Sc. 21, 21 ; 



V. 144,143; 0.62,62). 



Coata Rica. 



Chiriqui. 



W. Ecuador. 



Bologna, Ecuador. 



Quito. 



J. G. Champion, Esq. 

 [0.]; F. D. God- 

 man, Esq. [P.]. 



Mr. Eraser [O.J. 



(Type of i. mtidus.) 



E. Whymper, Esq. 

 [0.]. 



39. Lachesis nigroviridis. 



Bothrieohis nigroviridis, Peters, Mon. Berl. Ac. 1859, p. 278, pi. — . 



fig. 4 ; Cope, Journ. Ac. Philad. (2)'Tiii. 1876, p. 150. 

 Bothrops nigroviridis, F. Miill. Verh. Nat. Ges. Basel, vi. 1878, 



p. 401. 



Snout short, rounded, with sharp canthus. Eostral as broad as 

 deep or a little broader than deep ; nasal entire or semidivided ; 

 upper head-scales flat and imbricate, largest and smooth on the 

 snout and .vertex ; 5 to 7 longitudinal series of scales between th^ 

 supraoculars, which are large and sometimes broken up into two ; 

 internasals small ; two postoculars and a subocular, separated from 

 the labials by one series of scales ; temporal scales obtusely keeled ; 

 9 to 11 upper labials, second only exceptionally forming the 

 anterior border of the loreal pit. Scales rather feebly keeled, in 19 

 rows. Ventrals 134-146 ; anal entire ; subcaudals 49-54, single. 

 Tail prehensile. Green or olive above, speckled and spotted with 

 black ; a black streak on each side of the head, from the canthus 

 rostralis, over the outer bordei' of the supraocular shield, to a little 

 beyond the angle of the mouth ; upper surface of head sometimes 

 with black longitudinal streaks ; yellowish beneath, some or all of 

 the shields black-edged. 



Total length 535 millim. ; tail 90. 



Costa Kica. 



CHC. <S (V. 142, 134; C. 



60, 54) & $ (V. 141; C. 



50). 

 d^e. S (V. 146 ; C. 63) & 



$ (V. 146 ; 0. 49). 



Rio Frisio. 



Irazu. 



Mr. Rogers [0.],; 



F. D. Godman, 



Esq. [P.]. 

 F. D. Godman, Esq. 



[P-]- 



40. Lachesls aurifer. 



Thamnocenchris aurifer, Salvin, Proc. Zool. Soc. 1860, p. 459, pi. xxxii. 



fig.l. 

 Bothrieohis aurifer. Cope, Proe. Ac. Philad. 1871, p. 207. 

 Bothrops aurifer, F. Miill. Verh. Nat. Ges. Basel, vi. 1878, p. 401. 



Snout short and broad, with well-marked canthus. Eostral 

 broader than deep ; nasal entire or semidivided ; upper head-scales 



