562 VIPERIDZ. 
33. Lachesis wagleri. 
Seba, Thes. ii. pl. Ixviii. fig. 4 (1735). 
Cophias wagleri, Boie, Isis, 1827, p. 561. * ; 
Trigonocephalus wagleri, Schleg. Phys. Serp. ii. p. 542, pl. xix. 
figs. 16-18 (1837). 
Trimesurus maculatus, Gray, Zool. Miscell. p. 48 (1842), and Cat. 
p. 8 (1849) ; Motley § Dillwyn, Nat. Hist. Labuan, p. 48 (1855). 
—— subannulatus, Gray, ll. cc. pp. 48 & 9; Motley § Dillwyn, 1. c. 
. 44, pl. —. 
east puilipueate Gray, ll. ce. pp. 48 & 10. 
sumatranus (non Raffles), Gray, ll. ce. pp. 48 & 10. 
big sae sumatranus, Cantor, Cat. Mal. Rept. p. 121, pl. xl. 
fig. 9 (1847). : 
Trimesurus formosus (non Schleg.), Gray, Cat. p. 10. 
Tropidolemus hombroni, Guichen. in Dumont d’ Urville, Voy. Pile 
Sud, Zool., Rept. p. 28, pl. ii. fig. 2 (1853); Dum. § Bibr. vii. 
p- 1527 (1854); Peters, Mon. Berl. Ac. 1867, p. 29. 
—— wagleri, Dum. § Bibr. t. c. p. 1524; F. Mill. Verh. Nat. Ges. 
Basel, vii. 1883, p. 290. 
Trigonocephalus hombroni, Jan, Rev. § Mag. Zool, 1859, p. 155. 
Tropidolemus subannulatus, Peters, Mon. Berl. Ac. 1861, p. 691. 
——- philippinensis, Peters, 1. c. 
Trimeresurus wagleri, Giinth. Rept. Brit. Ind. p. 388(1864); Stoliczka, 
Journ, As. Soc. Beng. xiii. 1873, p. 126; Blanf. Proc. Zool. Soc, 
1881, p. 224. 
—- Rbiakiiihog var. immaculatus, Peters, Ann. Mus, Genova, 
iii. 1872, p. 42. 
Tropidolemus subannulatus, var. celebensis, Peters, Mon. Berl. Ac. 
1872, p. 584. 
Relics waged F. Miill. Verh. Nat. Ges, Basel, vii. 1882, p. 155; 
v. Lidth de Jeude, Notes Leyd. Mus. viii. 1886, p. 44. 
sir cay sp. F. Miill. Verh. Nat. Ges. Basel, viii. 1887, 
p- 281. 
Head very broad, little longer than broad; snout very short and 
broad, with more or less distinct canthus; eye very small. Rostral 
as deep as broad or a little broader than deep; nasal entire; upper 
head-scales small, strongly imbricate, keeled; supraocular usually 
narrow or broken up into scales; 7 to 13 scales across between the 
supraoculars; internasals more or less developed or indistinct ; one, 
two, or three postoculars and a subocular ; latter separated from the 
labials by one or two series of scales, rarely in contact with the third 
labial; temporal scales keeled; 8 to 10 upper labials, second not 
entering the loreal pit, third very large; gular scales obtusely 
keeled. Scales more or less distinctly keeled, in 19 to 27 rows. 
Ventrals 127-154 ; anal entire ; subcaudals 45-55. Tail prehensile. 
(ireen, with darker or lighter markings, black and yellow, or nearly 
entirely black. 
Total length 980 millim.; tail 150. 
Malay Peninsula and Archipelago. 
A. Green above, with white cross-lines edged behind with blue or 
purple, or with two dorsal series of small spots or cross-bars 
of the same colour; a white line on each side of the head, 
. 
