Vol. XXVIII. pp. 149-150 September 21, 1915 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



A NEW SNAKE FROM SOUTHERN PERU. 

 BY THOMAS BARBOUR. 



In a small collection of reptiles submitted to me for study by 

 Dr. Hiram Bingbam of Yale University, I find two specimens 

 of a Coronelline snake wbich appears to be undescribed. It 

 resembles in many respects Leimadophis taeniurus (Tschudi), 

 but differs in baving tbe scale rows evidently regularly nineteen 

 in number and having a somewhat lower number of both ven- 

 tral and subeaudal scales, and an entirely different type of 

 coloration. This species may be known as 



Leimadophis andicolus up. iiov. 



Type, ;ui adult, ^l. C. Z. No. 10,987, collected at Hnispan^, in the 

 Andes of southern Peru, altitude 12,175 feet, September 18, 1914, by 

 E. C. Erdis of tiie Yale Peruvian Expedition. 



Ej'e moderate; rostral sliglitly broader than high, scarcely visible from 

 above; internasal suture about equal to praefrontal suture; frontal longer 

 than its distance from end of snout, shorter than parietals, widely sepa- 

 rated from praeocular; supraocular narrower than frontal; nasal semi- 

 divided, about equal in length to its distance from the eye; loreal small, 

 almost square; one praeocular much broader above than below; two 

 postoculars; temporals 2-2 on one side and 2-3 on the other; eight supra- 

 lal)ials, fourth and fifth supralal)ials in contact with eye; nine lower 

 lal)ials, fourth in contact with anterior chin shield, one in contact with 

 posterior; anterior chin shields much longer and wider than posterior 

 ones; scales smooth, generally with a single apical pit, in 19 rows; ven- 

 trals 150; anal divided ; subcaudals in 49 pairs. 



Color pattern. — Groundcolor of head and body olive brown; an ill- 

 defined middorsal lighter stripe, composed of more or Jess confluent light 

 spots; two less well-defined light lateral stripes broken at regular intervals 

 by darker blotches; an alternating series of dark brown spots on each 

 side of the middorsal stripe, which not only alternate with each other, 

 but with the dark blotclies which interrupt the lateral light lines; sides 



31— Proc. Biol. Soc. Wash., Vol. XXVIII, 1915. (149) 



