11. LAcHEsIs. 539 
n-o. Yg. (Sc. 25, 25; V. Canelos, Ecuador. Mr. Buckley [C.}. 
194, 200; C. 61, 62). 
Dp. Yg. _(Se. 25; V. 200; Pebas, Peru. Mr, Hauxwell [C. ]. 
me ATED 
68). 
q;? Age 3 (Sc. 27; V.196; Moyobamba, Peru. Mr. A. H. Roff (C.]. 
C.70) & yg. (Se. 25, 27, 
27, 27,25; V. 203, 195, 
187, 194, 185; C. 75, 60, 
me 63, 63 
oe 3 (Se. 25 ; V. 196; Pozuzu, Peru. a Be Veitch, Esq. 
“609 ). 
wz. Yg. (Sc. 25; V. 186; Sarayacu, Peru. ue PW. Davis [C.]; 
C. 63). Messrs. Veitch ee 
y. Yg. (Se. 25; V. 185; Cayaria, Peru. Mr. W. Davis (OC. 
C. 66). Messrs. Veitch tg 
Z. ae (Sc. 27; V. 190; Demerara. Lieut. Friend [P 
6 
a. R is 27; V. 193; Demerara. Mr. Snellgrove [C.]. 
68). 
3 (Se. 25; V.196; Berbice. Lady Essex [P.]. 
5) & 2 ’(Se. 25 ; 
v. 198; C. 59). 
8, e-x. d (Sc. 25; V.183; Berbice. 
C. 71) & yg. (Sc. 27, 27, 
27, 25, 25, 25; V. 185, 
190, 194, 183, 182, 176; 
C. 73, 61, 59, 70, 70, 69). 
A-w. oS (Se. 25 ; V. 161; Brit, Guiana. Demerara Mus. [P.]. 
©. 47) & 9 ’(Se. 27 ; 
V. 200; C. 58). 
v. oe es a eV Li; Para: 
4. Lachesis pulcher. 
Trigonocephalus pulcher, Peters, Mon. Berl. Ac. 1862, p. 672. 
Snout broad, rounded, with sharp, slightly raised canthus. 
Rostral as deep as broad or slightly deeper than broad; nasal 
divided ; upper head-scales imbricate, largest and smooth on the 
snout, obtusely keeled and in 5 to 7 longitudinal series between 
the large supraoculars, with strong, short keels on the occiput ; 
a pair of large internasals and a large canthal; two postoculars 
and a subocular, separated from the labials by one series of scales ; 
temporal scales keeled ; seven upper labials, second forming the 
anterior border of the loreal pit. Scales in 21 or 23 rows, strongly 
and tubercularly keeled, the keels much shorter than the scales. 
Ventrals 156-172; anal entire; subcaudals 58-64 pairs. Olive- 
grey above, with brown, light-edged cross-bands which are con- 
tinuous, or broken on the vertebral line and alternating; a light 
streak from the eye to behind the angle of the mouth ; belly closely 
powdered with brown, with darker and lighter spots on the sides. 
Total length 685 millim.; tail 115. 
Andes of Ecuador. 
a. Hgr. 2 (Sc. 23; V. 156; C. 58). Quito. 
b. 2 (Sc. 28; V. 158 ; C. 64), Intac. Mr. Buckley [C]. 
