TWO NEW SNAKES FROM ASSAM. 273 



3rd and 4th above the ventrals coalesce. Vertebrals moderately en- 

 larged ; the last row barely enlarged. Ventrals : 242. Anal : Divided 

 Subcaudals : 118, divided. Colour: Yellowish with darkish brown 

 vertebral short crossbars, and a costal series of similar bars alternating 

 with the vertebral on each side. Belly obscurely mottled specially 

 behind. Head mottled brown, a conspicuous postocular streak, and a V 

 on the crown, the arms of which meet the postocular streak, and three 

 occipito-nuchal streaks. Length : Between two and three feet. The 

 anterior palatine teeth are not enlarged. 



Dendrel aphis biloreatus. 



This very graceful little snake was acquired at Sadiya on the Brama- 

 putra 70 odd miles north-east of Dibrugarh. 



It is 2 feet 3£ inches long, and the tail accounts for 9£ inches. 



Description. — Rostral: Touches six shields, the internasals and 

 anterior nasals making subequal sutures, which are rather longer than 

 the first labials. Internasals : Two, the suture between them three- 

 fourths that between the prefrontal fellows ; and three-fourths the 

 internaso- prefrontal sutures. Prefrontals : Two, the suture between 

 them one-third to one-fourth greater than the prsefronto-frontal suture ; 

 in contact with internasal, postnasal, two loreals, praeocular, supraocular, 

 and frontal. Frontal : Touches six shields, the sutures with the supra- 

 oculars are very long, more than twice that made with the parietals. 

 Supraoculars.: Breadth and length subequal to that of the frontal. 

 Nasals : Touch the 1st and 2nd supralabials, the anterior is rather 

 longer than the posterior. Loreals: Two (1 + 1), the anterior rather 

 the shorter. Prceocular : One. Pod<>culars : Two. Temporals :1 + 

 1+2. Supralabials : 9, the 4th, 5th and 6th touching the eye. 

 Posterior sublinguals : Longer than the .anterior ; quite separated ; in 

 contact with the 5th, 6th and 7th infralabials. Infralabials : The 7 th is 

 the largest of the series, more than twice the length of the 6th ; broader 

 than the posterior sublinguals, and in contact with two scales behind. 

 Costals : Two heads-lengths behind the head, 13 ; midbody, 13; two 

 heads-lengths before the vent 9. In the step from 1 3 to 1 1 the 5th 

 row above the ventrals disappears, in the next step from 11 to 9 the 4th 

 and 5th rows above the ventrals coalesce. Vertebrals much enlarged, 

 larger than the last row; last row enlarged. Ventrals: 192. keeled. 

 Anal : Divided. Subcaudals: 147, divided, keeled. Colour : Dorsally 

 bronze-brown, rather lighter vertebrally in forebody. A pale line runs 



