xiii. D, 6 Taylor: Snakes of the Genus Holarchus 361 



the first four bordering the first pair of chin shields (three 

 on right side) ; second pair of chin shields about one-iialf as 

 large as first pair; scales in 17 rows; 162 ventrals, rather 

 angulate ; anal single ; subcaudals, 43 ; eye moderate, its diameter 

 equal to its distance from anterior part of nostril. 



Color in life. — Above reddish brown, with a median, salmon- 

 pink longitudinal stripe covering one whole row, and two half 

 scale rows; each scale of the median row with a darker center; 

 laterally a dim grayish longitudinal stripe; on the second outer 

 row of scales a series of dark dots; a series of dim dark spots 

 on the outer edge of the ventrals. Head darker brown, with 

 elongate black spots on the frontal and on the inner part of 

 the parietals ; a black stripe runs diagonally from neck to parie- 

 tal ; a dark spot below the eye. Belly bright rosy pink. 



Measurements. — Total length, 305 millimeters; tail, 48. 



Remarks. — This species appears to be confined to Sulu Archi- 

 pelago; the only definite records are Tawitawi and Bongao." 

 These two records seem to be the only ones other than the types, 

 which are labeled Sulu Islands with no definite localities named. 

 This species is separated from Holarchus octolineatus on the 

 basis of its distinctive coloration and the much fewer ventrals 

 and subcaudal scales. The description is based on a single spe- 

 cimen collected by myself on Bongao, Sulu Archipelago, Phil- 

 ippine Islands, October 14, 1917. 



Holarchus ancorus Girard. 



Xenodon ancorus Girard, Proc. Acad. Philadelphia (1857), 182; U. S. 



Exp. Expedit., Herp. (1858), 167. 

 Simotes purpurascens var. c. part., Gunther, Cat. Col. Sns. (1858), 25. 

 Simotes phaenochalinus COPE, Proc. Acad. Philadelphia (1860), 244; 



BOULENGER, Cat. Sns. Brit. Mus. (1894), 2, 225. 

 Simotes ancoralis Jan, Arch. Zool. Anat. Phys. (1863), 2, 233; Icon. 



Gen. (1865), 11, PI. VI, fig. 2; Steindachner, Novara Rept. (1867), 



61. 

 Holarchus phaenochalinus Griffin, Phil. .Journ. Sci., Sec. D (1911), 



6, 259. 



Description of adult male. — No. 11429, E. H. T. collection. 

 Manila, P. I., June 15, 3 915. E. H. Taylor, collector. Rostral 

 large, much higher than wide; portion seen above nearly equal 

 to its distance from the frontal, sharply pointed behind; inter- 

 nasals small, wider than deep, their shortest suture being be- 



" Barbour, loc. cit., states: "H. meyerlinkii (Steind.) was doubtless 

 evolved by isolation from specimens of this species probably derived from 

 Borneo." 



157348 6 



