75. Lionris. 129 



1. Liophis pygnnaeus. 



Liophis pygmseus, Cope, Proc. Ac. Philad. 1868, p. 103. 



Head slightlj' distinct from neck, ovate, narrowed in front ; snout 

 slightly prominent. Eostral much broader than deep, just visible 

 from above; internasals broader than long; frontal large, elongate, 

 longer than its distance from the tip of the snout ; supraoculais 

 rather narrow ; loreal subquadrate ; one prse- and two postoculars ; 

 temporals 1 + 2 ; seven upper labials, third and fourth entering the 

 eye; chiu-shiclds equal. Scales in 17 rows. Ventrals 128; anal 

 divided; subcaudals 31. Above deep olive; leaden on the sides 

 and the ends of the ventral shields ; a black line from the eye to 

 the angle of the mouth ; a black occipito-nuchal collar, directed 

 backwards ; a series of black spots on each side, confluent into a 

 band from the middle of the body to the end of the tail ; below 

 uniform yellow. 



Total length 185 millim. ; tail 30. 



Napo or Upper Maranon. 



2. Liophis triscalis. 



Seha, ii. pi. xxxviii. fig. 3 (1735). 



Coluber triscalis, Linn. S. N. i. p. 38-5 (1766) ; Daud. Pept. vi. p. 377 



(1803). 

 Dromicus triscalis, Dum. >§• Bibr. vii. p. 672 (1854) ; Giinth. Cut. 



p. 131 (1^58). 

 Liophis triscalis, Jan, Arch. Zool. Anat. Phys. ii. 1863, p. 299, and 



Icon. Gin. 18, pi. iv. lig. 1 (1866j. 

 ? Liophis rufus, Jan, I. c. p. 301. 



Eye rather small. Rostral a little broader than deep, well 

 visible from above ; internasals as long as broad, as long as or 

 shorter than the pra3frontals ; frontal about once and a half as long 

 as broad, as long as or a little longer than its distance from the end 

 of the snout and a little shorter than the parietals ; loreal as long as 

 deep or a little deeper than long ; one or two prffi- and two post- 

 oculars ; temporals 1+2; eight upper labials, fourth and fifth 

 entering the eye ; five lower labials in contact with the anterior 

 chiu-shields, which are as long as or a little longer than the 

 posterior. Scales in 17 rows. Ventrals 187-195 ; anal divided ; 

 subcaudals 62-85. Length of tail 4| to 6 times in the total 

 length. Pale brown or greyish above, with three more or less 

 distinct dark brown longitudinal streaks on the back and two 

 on the tail ; lower parts whitish, uniform or dotted with brown. 



Total length 710 millim. ; tail 120. 



Curagao, Venezuela, Surinam. 



a. 2 (V. 189; C. 84\ Curasao. E. Hartert, Esq. [C.]. 



b, c. <5 (V. 191, 192 ; C. ?, 85). Surinam (?). Yau Lidth de Jeude 



d. 2 (V. 192 ; C. 62). Paraguay (?). 



VOL. II. 



Collection. 



