120 



Habitat: Sumatra (Labuan in Deli, Indragiri, Gunung 

 Sahilan!, Padangl); Riou!. — Singapore; Malay Peninsula. 



2. Dryocalamus tristrigatus Giinther. 



Dj-yocalamus tristrigatus^ Giinther, Cat. Col. Snakes. 1858, p. 121. 

 Dryocalaiims tristrigatus^ Boulenger, Cat. Sn. I 1893, P- 372, pi. XXV, fig. 3. 

 Dryocalamus trilineatns^ Brown, Proc. Acad. Philad. LIV 1902, p. 179 '). 



Rostral more broad than deep, visible from above; nasal 

 undivided; suture between the internasals shorter than that 

 between the praefrontals; frontal longer than its distance from 

 the tip of the snout, shorter than the parietals; loreal about 

 twice as long as deep, entering the eye; no praeocular; two 

 postoculars; temporals 2 + 2 or 2 + 3; seven (six) upper labials, 

 third and fourth entering the eye ; four lower labials in contact 

 with the anterior chin-shields; posterior chin-shields very short. 

 Scales in 15 rows; ventrals 218 — 23 1; anal entire; subcaudals 

 86—96. 



Dark brown above, with three white stripes; outer row of 

 scales white; shields of the head edged with white; upper lip 

 white. Lower surface white. Length of head and body 280 mm.; 

 tail 80 mm. 



Type-specimen examined in the British Museum. 



Habitat: Natuna Islands!; Borneo (Claudetown on Baram 

 river, Baram!, Labuan, Mt. Mulu 2000 feet, Kuching, Pen- 

 rissen Road). 



24. Tetralepis Bottger. 



(BoTTGER, Ber. Offenb. Ver. Naturk. p. 124, 1892). 



Head small, not distinct from neck; eye small; pupil round. 

 Maxillary teeth 14, third to eighth longest, last six decreasing 

 in size; mandibular teeth increasing in size to the fifth, last 

 very small. Body round, covered with smooth scales, without 

 pits, in 15 rows; ventrals rounded. Tail short; subcaudals in 

 two rows. 



Distribution. Java. 



A single species. 



i) In the description of D. trilincatns^ Brown states that his specimen from 

 the Baram district has only one postocular. In the British Museum I examined 

 a specimen of D. tristrigatus from the Natuna Islands with two postoculars on 

 the right side and one on the left. 



