io8 

 Key to the Indo- Australian species. 



A. No praeocular; piaefrontal entering the eye; scales 



in 17 rows I. Z. subcinctus p. 108. 



B. Praeocular present, separating the eye from the 

 praefrontal. 



I. Scales keeled, in 17 rows 2. Z. albofuscus p. 109. 



II. Scales smooth. 



a. Subcaudals single. 



X Scales in 19 rows 3. Z. stormi p. no. 



XX Scales in 21 rows 4. Z. Jlorensis p. no. 



b. Subcaudals in two rows ; scales in 1 7 rows. 



1. Loreal present; anal divided 5. Z. milieus p. in. 



2. No loreal; anal entire 6. Z. effrenis p. 112. 



I. Lycodon subcinctus Boie. 



Lycodon subcinctus^ Boie, Isis 1827, p. 551. 



Lycodon subcinctus^ Boulenger, Cat. Sn. I 1893, p. 359. 



Snout broad, much depressed; eye small; rostral just visible 

 from above; internasals much shorter than the praefrontals; 

 frontal shorter than its distance from the tip of the snout, 

 much shorter than the parietals; loreal long, widely separated 

 from the internasal, usually entering the eye; no praeocular; 

 two or three postoculars; temporals i + 2; eight upper labials, 

 third to fifth or sixth entering the eye; four lower labials in 

 contact with the anterior chin-shields ; latter longer than the 

 posterior. Scales in 17 rows, dorsals feebly keeled; ventrals 

 128- — 230, with a lateral angle; anal divided (rarely entire); 

 subcaudals 61 — 90 pair. 



Dark brown or black above, with a white occipital region 

 and widely separated rings on the body and tail, disappearing 

 in the adult. Lower surface brown or yellowish-brown. Length 

 of head and body 820 mm.; tail 180 mm. 



Habitat: Simalur!; Nias; Mentawei Islands (Siberut!); 

 Sumatra (Labuan, Deli!, Bedagei, Langkat, Fort de Kock, 

 Pajo, Rau, Padang); Borneo! (Sandakan, Bulangan river, Ku- 

 ching, Muching); Java (Batavia, Depok, Buitenzorg!, Salak, 

 Sukabumi!, Semarang, Tjandi!, Gunung Ungaran!, Wonosobo, 

 Madiun!, Kediril, Nongkodjadjar in Tengger Mts. 1300 M.!, 

 Prigan 1800 — 2300 feet); Lombok; Sumbawa. — Penang; Singa- 

 pore; Malay Peninsula; Siam; Philippines, 



Feeds on lizards. 



