195 



vertically elliptic; posterior nasal concave. Maxillary teeth 

 10 — 14, about equal, followed by two or three enlarged, grooved 

 teeth; anterior mandibular teeth longest. Body compressed, 

 covered with smooth scales, more or less oblique, with pits, 

 in 17 — 31 rows, the vertebral row enlarged; ventrals angulate 

 laterally. Tail long; subcaudals in two rows. 



Distribution. Tropical Africa; S. Asia; Papuasia; Australia. 



Arboreal and nocturnal. 



Key to the Indo-Australian species. 



A. Anterior palatine teeth not or a little enlarged. 



I. Scales in 19 (17) rows. 



a. Snout longer than eye; praeocular not 



extending to upper surface of head . . . i. D. vniltiviactilains p. 195. 

 I). Snout as long as the eye; praeocular ex- 

 tending to upper surface of the head . . 2. D. drapiezii p. 196. 



II. Scales in 21 (23) rows. 



a. Snout longer than the eye. 



1. Subcaudals 89 — ilo; posterior chin- 

 shields as long as anterior or shorter. 3. D. dendrophilus p. 197. 



2. Subcaudals 140 — 154; posterior chin- 

 shields longer than anterior i\. D. nigriccps p. 199. 



b. Snout as long as the eye 5. A jaspidciis p. 199. 



B, Anterior palatine teeth strongly enlarged. 



I. Praeocular extending to upper surface of head. 

 aa. Scales in 23 (25) rows; ventrals 248 — 290; 



subcaudals 114 — 159 6. Z>. cyuodon p. 200. 



bb. Scales in 19 — 23 rows; ventrals 21 7 — 272; 



subcaudals 100 — 125 7. D. irregularis p. 20I. 



II. Praeocular not extending to upper surface 



of head %. D. favescens p. 202. 



r. Dipsadomorphus multimaculatus (Boie). 



Dipsas vitiltimaculata^ Boie, Isis, 1827, p. 549. 



Dipsadomorphus multimaculatiis^ Boulenger, Cat. Sn. Ill 1896, p. 63. 

 fioiga viultiinaculata^ Barbour, Mem. Mus. Comp. Zool. Harv. Coll. XLIV 

 1912, p. 124. 



Snout longer than eye; rostral more broad than deep, visible 

 from above; internasals shorter than praefrontals; frontal as 

 long as or a little longer than its distance from the tip of 

 the snout, shorter than the parietals; loreal as long as deep 

 or a little more deep; a praeocular not extending to the upper 



