Habitat: Southern Brazil, Paraguay, Uruguay, Argentina.
(8) L. neuwiedii (known as the Urutù in Brazil; [fig. 70]).—Snout obtusely pointed; supraocular large, separated from its fellow by 6-9 longitudinal series of scales; 8 or 9 supralabials; scales very strongly keeled, in 21-27 rows; 168-182 ventrals; 41-53 subcaudals.
Colour yellowish or pale brown, with dark brown black-edged spots; the spots on the back form a single series or a double alternating series; a dark spot on the snout; a pair of dark bands from the vertex to the nape, and another from the eye to the angle of the mouth; belly yellowish, more or less powdered with brown.
Total length, 770 millimetres; tail 120.
Habitat: Brazil, Paraguay, Argentina.
Fig. 70.—Lachesis neuwiedii (known as the Urutù in Brazil). (After Lacerda.)
(9) L. ammodytoides.—Snout turned up, in the shape of a wart; two series of scales between the eye and the labials; scales in 23 or 25 rows, very strongly keeled; 149-160 ventrals; 30-38 pairs of subcaudals.
Colour pale brown, with large brown black-edged spots or cross-bands, which may alternate and form a zigzag band; a dark streak behind the eye; belly yellowish, spotted with brown.
Total length, 460 millimetres; tail 55.