iy6 

 Key to the Indo-Australian species. 



A. One or two labials entering the eye ; one shield between the nasal and the 

 eye; praefrontal entering the eye. 



1. Six upper labials \. A. laevis p. 276. 



2. Seven upper labials 2. A. malaccanus p. 276. 



B. A series of suboculars; loreal and praeocular distinct. 



a. Praefrontal entering the eye 3. ^. nuchalis p. 277. 



b. Praefrontal separated from the eye 4. y^. carinaius p. 277. 



I. Amblycephalus laevis Boie. 



Amblycephahis laevis^ Boie, Isis, 1827, p. 520. 



Amblycephalus laevis^ Boulenger, Cat. Sn. Ill 1896, p. 441 (s. syn.). 



Rostral a little more broad than deep; praefrontal entering 

 the eye; frontal as long as broad or slightly more broad than 

 long, as long as its distance from the tip of the snout or a 

 little longer, two thirds the length of the parietals ; supraocular 

 very small; loreal entering the eye; no praeocular; one or 

 two postoculars; temporals 2 + 2; six upper labials, third and 

 fourth or third to fifth entering the eye, last very long; mental 

 in contact with a small azygous chin-shield; third lower labial 

 in contact with its fellow; two pair of large chin-shields, more 

 broad than long. Scales in 15 rows, smooth, the vertebral 

 row enlarged; ventrals 148 — 176; anal entire; subcaudals 34 — 69. 



Brown above, with irregular transverse dark bands; sides 

 dull orange. Lower surface brown or yellowish, with brown 

 spots or transverse brown spots on the sides. Length of head 

 and body 480 mm.; tail 65 mm. 



Habitat: Sumatra (Peudawa in Atjeh, Labuan, Deli!, Raja 

 Mts., Gunung Sahilan!, Indragiri); Banka!; Natuna Islands; 

 Borneo (Kina Balu, Bongon, Baram river, Kuching, Pangkalan 

 ampat, Limbang, Kidi district, Sarawak, Bandjermassin !); Java! 

 (Buitenzorg). — Malay Peninsula. 



2. Amblycephalus malaccanus (Ptrs.). 



Asthcnodipsas malaccana^ Peters, Mon. Berl. Ac. 1864, p. 273. 

 Amblycephalus malaccanus^ Boulenger, Cat. Sn. Ill 1896, p. 442. 



Rostral a little more broad than deep; praefrontal entering 

 the eye; frontal as long as broad or a little more broad, as long 

 as or longer than its distance from the tip of the snout, much 

 shorter than the parietals; supraocular small; loreal entering 



