118 COLTJBBIBJ!). 



distinct from neck ; eye moderate, with vertically elliptic or sub- 

 elliptic pupil ; nasal shield single or semidivided. Body cylindrical j 

 scales smooth, with apical pits, in 17 or 19 rows ; ventrals rounded. 

 Tail moderate ; subcaudals in two rows. 

 Bolivia, Peru, Chili. 



1. Tachymenis peruviana. 



Tachvmenis peruviana, Wiegm. N. Act. Ac. Leop.-Carol. xvii. i. 1835, 



p. 262, pi. XX. fig. 1 ; Peters, Man. Berl. Ac. 1863, p. 275 ; Steind, 



Novara, Sept. p. 62 (1867). 

 Coronella chilensis, ScMeg. Phys. Serp. ii. p. 70 (1837) ; Guichen. in 



Oay, Hist. Chile, Kept. p. 79, pi. iv. fig. 1 (1854). 

 Ophis peruana, Tschudi, Faun. Per., Herp. p. 58 (1845). 

 Dipsas chilensis, Dum. 8f Bibr. vii. p. 1159 (1854). 

 Tachymenis chilensis, Girard, Proc. Ac. Philad. 1854, p. 226, and 



Gilliss' U.S. Nav. Astron. Exped. ii. p. 213, pi. xxxvii. figs. 1-6 



(1856), and U.S. Exphr. Exped., Serp. p. 173 (1858) ; Gunth. Cai. 



p. 34 (1858) ; Cope, Proc. Ac. Philad. 1860, p. 247. 

 Mesotes chilensis, Jan, Arch. Zool. Anat. Phys. ii. 1863, p. 308, and 



Icon. GSn. 18, pi. vi. fig. 2 (1866). 

 Psammophylax assimilis, Jan, II. eo. p. 311, Icon. 19, pi. i. fig. 2. 



Eostral broader than deep, scarcely visible from above ; inter- 

 nasals as long as or shorter than the prsefrontals ; frontal once and 

 a half to twice as long as broad, a little longer than its distance from 

 the end of the snout, as long as or a little shorter than the parietals \ 

 loreal as long as deep ; one or two prae- and two postoculars ; tem- 

 porals 1+2 or 2+3 ; seven or eight upper labials, third and fourth 

 or fourth and fifth entering the eye ; four or five lower labials in 

 contact with the anterior chin- shields, which are as long as or longer 

 than the posterior. Scales in 19 rows. Ventrals 135-158 ; anal 

 divided ; subcaudals 33-53. Yellowish or pale brown above, with 

 darker spots or more or less distinct longitudinal streaks ; an oblique 

 dark streak from the eye to the angle of the mouth ; yellowish or 

 grey beneath, usually with small blackish spots often forming longi- 

 tudinal series. 



Total length 630 millim. ; tai 90. 



Bolivia, Peru, Chili. 



a. (S (V. 144 ; 0. 63). Aschiquiri, Bolivia. 



b. 2 (V. 142; C. 44). Lareoaja, Bolivia. 



c. S (V. 135; G. 51). Lake Titicaca. J. B. Pentland, Esq, 



[P.J. 



d. 5 (V. 151; 0. 39). Colchagua, Chili. 



e. cJ (V. 145 ; 0. 44). Ooquimho. Dr. Cunningham [P.]. 

 f-g. 2 (V. 141 ; C. 49) & yg. Coquimbo. Dr. Coppinger [P.]. 



(V. 140, 146; C.46,36). 



h. 2 (V. 157 ; C. 43). Talcahuana. Dr. Coppinger [P.]. 



i-l. d (V. 158 ; 0. 46) S. Chili. Mr. A. Lane [0.1 f 



& 2 (V. 147 ; C. 45). H. B. James, Esq, 



m-n. 2 (V. 148, 161 ; C. Chili. 



38, 33). 

 0, Yg. (V. 158; C.46). Chili. 



[P.]. 



