2o5 



concave; eye large; pupil horizontal; nasal single, frontal narrow. 

 Maxillary teeth 12 — 15, one or two middle ones enlarged, sepa- 

 rated from the posterior by an interspace; one or two last 

 grooved, large and situated below the posterior border of the 

 eye; three or four anterior mandibular teeth increasing in 

 length, posterior small. Body long, compressed, covered with 

 smooth scales, in 15 rows, without pits, oblique; the vertebral 

 row enlarged; ventrals rounded. Tail long; subcaudals in 

 two rows. 



Distribution. S. E. Asia. 



Arboreal; ovoviviparous. 



Key to the Indo-Australian species. 



A. Snout without appendage. 



I. Less than 200 ventral shields ; subcaudals 



115 — 156 I. Z>. xanthozona p. 205. 



II. Usually more than 200 ventral shields; sub- 

 caudals 151 — 207. 



1. Frontal longer than the parietals; anal divided 



(rarely entire) 2. D. prasinus p. 206. 



2. Frontal as long as the parietals; anal usu- 

 ally entire 3- ■^. fasciolatus p. 207. 



B. Snout with a rostral appendage 4. Z>. mycterizans p. 208. 



I. Dryophis xanthozona Boie. 



Dryophis xanthozona.^ Boie, Isis, 1827, p. 545. 



Dryophis xanthozona.^ Boulenger, Cat. Sn. Ill 1896, p. 180. 



Snout pointed, projecting, nearly twice as long as the eye; 

 internasals in contact with the rostral; frontal longer than its 

 distance from the tip of the snout, as long as the parietals; 

 three or four small loreals in a row; a praeocular in contact 

 with the frontal; two postoculars; temporals 2 -|- 2; eight or 

 nine upper labials, fourth and fifth or fourth to sixth entering 

 the eye; four lower labials in contact with the anterior chin- 

 shields; latter shorter than posterior. Scales in 15 rows; ventrals 

 186 — 195; anal entire (rarely divided); subcaudals 115 — 156. 



Green or purple above; greenish or purplish below, with a 

 yellow streak on each side and two indistinct stripes in the 

 middle, separated by a purple streak. Length of head and 

 body 752 mm.; tail 410 mm. 



Habitat: Java (Depok, Salak, Kediri!). — Penang; W. Sia- 

 mese Malay States. 



Much rarer than the following species. 



