11. LACHESIS. 557 
Snout with strong canthus, obliquely truncate, more prominent 
than in LZ. gramineus; eye small. Rostral as deep as broad ; nasal 
entire or divided; upper head-scales small, smooth, imbricate, 3 to _ 
10 in a transverse series between the supraoculars, which are 
narrow ; two or three scales separating the internasals in front ; 
two or three postoculars and a subocular, which is in contact with 
the third or third and fourth labials; temporal scales smooth ; 9 to 
11 upper labials, second forming the anterior border of the loreal 
pit, third largest. Scales smooth or feebly keeled, in 21 rows. 
Ventrals 170-187 ; anal entire; subcaudals 55-73. Tail prehen- 
sile. Bright green or olive above, uniform or spotted or barred with 
reddish brown ; a series of bright yellow or salmon-pink spots on 
the outer row of scales; green, olive, or greenish yellow beneath ; 
end of tail sometimes red. 
Total length 1060 millim.; tail 160. 
Philippine Islands. 
a,b. 3 (V. 184; C. 63) Philippines. H. Cuming, Esq. [C.]. 
& hgr. ¢ (V. 178; (Types.) 
O. 65). 
e. Hgr. ¢ (V.182; C. 73). Philippines. H. Cuming, Esq. [C.]. 
(Type of M. ornata.) 
d. Yg. (V.178; C.61). Philippines. H. Cuming, Esq. [C.}. 
(Type of M. varvegata.) 
e. ¢ (V.178; C. 64). Placer, N.E. Min- A. Everett, Esq. [C.}. 
danao, 
f—. 9 (V. 187; C. 56) & Luzon. Dr. A. B. Meyer [C.]. 
yg. (V. 170, 181, 177; 
C. 61, 55, 61). 
L. flavomaculatus should perhaps be regarded as a variety of 
L. gramineus. 
27. Lachesis sumatranus. 
Coluber sumatranus, Raffles, Trans. Linn. Soc. xiii. 1822, p. 334. 
Trigonocephalus formosus, Schleg. in Temm. Verh. Nat. Gesch. 
Nederl. Ind., Rept. p. 52, pl. vii. (1844). 
Bothrops formosus, Jan, Elenco, p. 126 (1863), and Icon. Gén. 47, 
pl. v. fig. 1 (1875) ; Modigliani, Ann. Mus. Genova, (2) vii. 1889, 
~121. 
We titekenins formosus, Bouleng. Ann. § Mag. N. H. (5) xvi. 1885, 
p. 388. 
Bothrops sumatranus, v. Lidth de Jeude, Notes Leyd. Mus. viii. 1886, 
p- 52, pl. ii. fig. 6. 
— hageni, v. Lidth de Jeude, 1. ¢. p. 53. 
Head rather elongate. Rostral as deep as broad or a little 
broader than deep; nasal entire or divided; upper head-scales 
rather large, flat, smooth, imbricate or subimbricate, largest on the 
snout, 4 to 9 in a transverse series between the supraoculars, 
which are large; two or three postoculars and a subocular, which 
is in contact with the third or third and fourth labials ; temporal 
scales smooth ; 9 to 11 upper labials, second forming the anterior 
border of the loreal pit, third largest. Scales feebly keeled, in 
