24 SNAKES FROM DEHLl. 



In Ps. pictus the head has an oblong form and the lips 

 are bent outwards and extend , when seen from above , 

 far beyond the width of the posterior frontals , in this 

 manner there is formed a longitudinal concavity along the 

 snout just above the labials; the canthus r ostralis is 

 not so clearly visible as in Ps. pulverulentus. The anterior 

 frontals are much longer than in Ps. pulverulentus. The 

 distance from the tip of the snout to the end of the ver- 

 tical in Ps. pulverulentus equals the distance between the 

 outer sides of the supraciliaries , in Ps. pictus it by far 

 exceeds that distance and even the width of the head any- 

 where. 



From the three Dehli specimens one was captured at 

 Langkat, the others are from Laboean. One of these has 

 two postoculars on each side, the other two have three 

 postoculars. In all three the first and the third lower la- 

 bial of one side meet those of the other side without chin- 

 shields between them. This character seems to be a very 

 constant one. 



As to the coloration, the specimen from Langkat has 

 a brown colour , without the darker band along the back 

 but with indications of the light spots. The two specimens 

 in Dr. Hagen's collection are of a grayish colour with a 

 broad dark band along the back and light spots put al- 

 ternatively. They all have a dark stripe from the tip of 

 the snout through and behind the eye , in one of the 

 grayish specimens this stripe or line extends along the 

 neck on the sides of the body and runs with some inter- 

 ruptions as far as the beginning of the tail. 



In the Leyden Museum there are four specimens from 

 Borneo, two of them of a brownish, the others of a grayish 

 colour; one of them shows a whitish line along the can- 

 thus rostralis above the dark line, extending along a part 

 of the trunk. One of these specimens has only two post- 

 oculars on each side. No chin-shields between the first 

 and third lower labials of both sides, in any of the four 

 specimens. 



N'otes from tlie Leyden Museum , Vol. XII. 



