TRIMERESURUS MONTICOLA. 
‘ The second upper labial forms the front of the pit. There are two 
small shields behind the nostril, sometimes a small azygos shield below 
this. The scales on the head are smooth, those on the body slightly 
carinated. There are twenty-three series. Wentrals 137-141; sub- 
caudals 41. The supra-ciliaries are very large. The coloration varies. 
In one specimen it is pale brown, with a vertebral row of large, square, 
dark brown blotches. Along the sides a row of small dark spots; a pale 
temple-streak. Belly dark mottled. ‘The larger male specimen, which 
is also from Darjeeling, is of a dark brown or almost blackish-ash colour, 
with the rhomboid patches along the vertebrae. There is a peculiar mark 
in the middle of the neck like a U, which is of a yellowish or whitish 
colour.” (Fayrer.) It is found in the sub-Himalaya, the Darjeeling, 
Sikkim, Nepaul, and Khasya Hills; and in the Neilgherries and 
Anamally Mountains in Southern India. 
Trimeresurus Andersonii. 
‘Mr. Theobald has named what he considers a new species after 
Dr. Anderson, the Curator of the Indian Museum. It is described in 
his ‘Catalogue of the Asiatic Society’s (now Indian) Museum,’ pp. 75 
to 76. It has 25 rows of carinated scales, 182 ventrals, and 56 sub- 
caudals in one specimen, and 71 in the other. The second upper labial 
forms the anterior margin of the pre-orbital pit ; supra-nasals separated 
by an azygos shield. The colour above and below is a uniform rich 
brown. Belly and sides marked conspicuously with white spots. 
Found in Assam. A second individual, named by Mr. Theobald in the 
same Catalogue as 7! obscurus, has the back of a uniform brown, sides 
