86 



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

 shorter than the parietals; loreal more deep than long; one 

 prae- and three postoculars; temporals 2 + 3; eight upper 

 labials, third to fifth entering the eye; five or six lower labials 

 in contact with the anterior chin-shields; latter shorter than 

 the posterior. Scales in 17 rows, all strongly keeled; ventrals 

 136 — 154; anal divided; subcaudals 52 — 89. 



Olive-brown above, with a series of dark transverse bars, 

 two series of yellow spots or yellow stripes; or blackish above, 

 with orange spots anteriorly; a series of black spots on each 

 side; head vermiculated with black; labials yellow, with black 

 sutures. Lower surface black and yellow, sometimes black 

 predominating. Length of head and body 400 mm.; tail 

 160 mm. 



Habitat: Borneo (Kina Balu!, Mt. Dulit, Matang!, Kuching, 

 Penrissen Road). 



18. Tropidonotus chrysargoides Giinther. 



Tropidonottis chrysargoides^ Giinther, Cat. Col. Snakes 1858, p. 71. 

 Tropidonotus chrysargoides^ Boulenger, Cat. Sn. I 1893, p. 260; Pioc. Zool. 



Soc. 1897, p. 219. 

 Tropidonotus callistus^ Giinther, Proc. Zool. Soc. 1873, p. 170. 

 Tropidonotus callistus^ Boulenger, Cat. Sn. I 1893, p. 263. 



Eye large; rostral more broad than deep, scarcely visible 

 from above; internasals broadly truncate anteriorly, as long as 

 the praefrontals ; frontal as long as or longer than its distance 

 from the tip of the snout, shorter than the parietals; loreal as 

 long as deep or slightly more deep; one prae- and two to 

 four postoculars; temporals 2 + 2 or 2 + 3; eight or nine upper 

 labials, fourth to sixth, fourth and fifth or fifth and sixth 

 entering the eye; five or six lower labials in contact with the 

 anterior chin-shields; latter shorter than the posterior. Scales 

 in 21 rows, strongly keeled; ventrals 148— 161; anal divided; 

 subcaudals 64 — 85. 



Dark olive above; upper lip yellow. Lower surface yellow, 

 the shields edged with olive. Young specimens {Tr. callistus) 

 with a white vertebral stripe with a scolloped edge anteriorly; 

 a round white spot on each side behind the head, another on 

 the occiput and a white band across the frontal, supraoculars 

 and praeoculars; upper labials white with black sutures. Lower 

 surface and outer row of scales white, with a black band 



