11. LAcHEsIs. 547 
in 25 to 27 rows. Ventrals 152-159; anal entire; subcaudals 
29-35, single. Yellowish brown, pale brown, or grey above, with 
a dorsal series of large dark brown black-edged rhomboidal or 
squarish spots, usually divided by a narrow yellow or orange verte- 
bral line ; sides of head blackish; belly powdered with brown, with 
or without whitish spots. 
Total length 575 millim.; tail 70. 
From Southern Mexico to Colombia, Venezuela, and Brazil. 
a. 2 (Se. 25; V.152;C. Yucatan. 
35). | | 
b-d. Hgr. (Sc. 26, 25,27; Chiriqui. F. D, Godman, Esq. 
V. 159,155, 155; C. 32, [P.]. 
34, 29). 
e,f. 3 (Se. 25, 25; V. Carthagena, Colombia. Capt. Garth [P.]. 
153, 152; C.?, 35). 
15. Lachesis brachystoma. 
Teleuraspis castelnaui, var. brachystoma, Cope, Proc. Ac. Philad. 
1859, p. 339. 
Bothriechis brachystoma, Cope, Proc. Ac. Philad. 1861, p. 295. 
Bothrops lansbergii (non Schleg.), Giinth. Ann. & Mag. N. H. (3) 
as 1863, p. 350; F. Mill. Verh. Nat. Ges. Basel, vi. 1878, 
p. 703. 
nasutus, Bocourt, Ann. Sc. Nat. (5) x. 1868, p. 202, and Journ. 
de Zool. vy. 1876, p. 410. 
Porthidium nasutus, Cope, Proc. Ac. Philad. 1871, p. 207, and Proe. 
Amer. Philos. Soc, xviii, 1879, p. 271. 
Bothriopsis brachystoma, Cope, /. e. p. 208. 
proboscideus, Cope, Journ. Ac. Philad, (2) viii. 1876, p. 150, 
pl. xxvii. fig. 3. 
Bothrops brachystoma, Bocourt, Journ. de Zool. v. 1876, p. 410. 
Thanatophis sutus, Posada-Arango, Bull, Soc. Zool. France, 1889, 
. 344. 
Bathriechis lansbergii, part., Giinth. Biol. C.-Am., Rept. p. 190 
(1895). 
Closely allied to the preceding, but snout much produced above, 
as in Vipera latastii, and rostral once and two thirds to twice 
as deep as broad. Scales in 23 (rarely 25) rows. Ventrals 132- 
150; subcaudals 27-38. 
Total length 500 millim.; tail 50. 
Southern Mexico and Central America. 
a. do (V. 144; C.38). Tehuantepec. M. Sumichrast [C.]. 
b-c. g (V. 189; C. 86) Vera Paz, low forest. O. Salvin, Esq. oh 
& 9 (V. 142; C. 30). 
d-f. 2 (V. 139,183; C. Hacienda Rosa de Dr. E. Rothschuh 
re & hgr.(V.186; Jericho, Nicaragua, [C.]. 
: 32650 ft. 
g. Hgr. (V. 187; C. 28). Chontalez, Nicaragua. 
h. Hgr. (V. 142; C. 27). Colombia. Mr. F. A. Simons 
[C.]. 
2n2 
