( 155 ) 



the colour is paler and there is a black collar, and vertical black 

 bars on the sides anteriorly. 



Grows to 23 inches. (Tail 5.) 



Inhabits the Himalayas from Simla to Dorjiling. 



A. olivaceus, Beddome. 



Scales in 17 rows. Anterior frontals small. Posterior large, 

 twice as broad as long, bent downwards on the sides. Nostril in 

 a shield divided below, but not above. Two small prseoculars.' 

 Two postoculars. 5 upper labials, the third forming the lower 

 edge of the orbit. Colour dark greenish olive, paler. below. A 

 series of distant small black dots along each side of the back 

 with another less distinct lower down on the side. 



Grows to 20-5 inches. (Tail 4.) 



Inhabits Marrantoddy in the Nilghiri hiUs. 



The nasal of this species is aberrant and quite that of Psam- 

 Tnophis coTidanurus. 



A. Sagittarius, Cantor. 



Scales in 17 rows. One prseocular. The occipital extends 

 laterally to the lower postocular. 7 upper labials, the third and 

 fourth entering the orbit (the second sometimes divided). Colour 

 reddish or greyish olive, darker on the sides, the paler colour- 

 ation of the back being bordered by a blackish line. A verte- 

 bral series of black dots. Head brown above. A broad black or 

 dark brown collar edged with yellow. Belly white with a black 

 dot on the end of each ventral. During life the belly is of a 

 citrine colour with a blue lateral band. 



Grows to 12 inches. (Tail 2.) 



Inhabits Pinang, Tirhut, and Kangra valley. 



A. bistrigatus, Giinther. An. & Mag., N. H., 1868, p. 416 ; 



Theobald. Jour., Lin. Soc, Vol. X. j 



Closely allied to Humherti in all particulars and in possessing 



two posterior temporals instead of one. Colour: Head black 



emitting a distinct black band on either side continued to the 



tip of the tail. Two yellow spots on the nape. A yellow dot 



