81. RHADIN®A. 175 
anal divided ; subcaudals 52-85. Length of tail 3 to 43 times in 
the total length. Brown above, with a blackish vertebral streak or 
zigzag band, becoming indistinct on the anterior part of the body 
in the adult ; a black streak from the eye to the side of the neck, and 
another along each side of the tail ; upper labials yellowish, uniform 
or spotted with black, or blackish spotted with yellow; a light, 
black-edged spot on each side of the nape, and usually a pair of 
light dots close together on the parietals; yellowish inferiorly, 
uniform or the edges of the ventrals blackish ; a black spot at the 
outer end of each ventral; chin and throat usually dotted or spotted 
with black. 
Total length 410 millim.; tail 135. 
Brazil, Ecuador, Guiana *. 
a-b. S (V. 156; C. 66) & Milligalli, Keuador, E. Whymper, Esq. [C.]. 
OV tbs eC or ) 6200 feet. (Types of C. whympert. 
e. Her. (V. 165; C. 57). W. Ecuador. Mr. Fraser [C.]. 
d-e. Her. (V. 160, 161; Pebas. Mr. J. Hauxwell[C.]. 
C. 60, P). (Types of D. viperinus.) 
19. Rhadinza melanauchen. 
Enicognathus melanauchben, Jan, Arch. Zool. Anat. Phys. ii. 1863, 
p. 267, and Icon. Gén. 16, pl. i. fig. 2 (1866), 
Eye rather small. Rostral much broader than deep, scarcely 
visible from above ; internasals as long as broad, nearly as long as the 
preefrontals ; frontal once anda half as long as broad, a little longer 
than its distance from the end of the snout, a little shorter than the 
parietals ; loreal square; one pree- and three postoculars ; temporals 
142; eight upper labials, third, fourth, and fifth entering the eye; 
four lower labials in contact with the anterior chin-shields, which 
are much shorter than the posterior. Scales in 15 rows. Ventrals 
148; anal divided; subcaudals 60. Reddish brown above, with 
blackish cross bands; a large blackish, white-edged transverse spot 
on the nape; lips and chin white, speckled with black; lower 
surface uniform white. 
Total length 350 millim.; tail 95. 
Bahia. : 
20. Rhadinea occipitalis. 
Coronella elegans (non Tsch.), Giinth. Cat. p. 88 (1858). 
Enicognathus occipitalis, Jan, Arch. Zool. Anat. Phys. ii. 1863, 
p. 267, and Icon. Gén. 16, pl. i. fig. 1 (1866), 
Dromicus (Lygophis) wuchereri, Giinth. Ann. § Mag. N. H. (3) 
xii. 1864, p. 225, fig. 
Liophis regine, part., Steind. Sitz. Ak. Wien, lv. 1867, p. 268. 
Dromicus miolepis, Boettg. Zool. Anz. 1891, p. 595. 
Rhadinza occipitalis, Bouleng. Ann. § May. N, H. (6) xiii. 1894, 
p. 347. 
* I have examined a specimen from Cayenne, preserved in the Basle Museum. 
