81. EHADINiEA. 175 



anal divided ; subcaudals 52-85. length of tail 3 to 4^ 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, Ecuador, E. Whytnper, Esq. [C.]. 



5 (V. 154 ; 0. ?) 6200 feet. (Types of C. whymperQ 



c.%r.(V. 165; 0.57). W.Ecuador. Mr. Eraser [0.]. I 



d-e.Ugr. (V. 160, 161; Pebas. Mr. J. Hauxwell [0.]. ( 



C. 60, ?). (Types of D, viperinus.) 



19. Rhadinaa melanauchen. 



Enicognathus melanaucten, Jan, Arch. Zool. Anat. Phys.n, ]868, 

 p. 267, and Icon. G4n. 16, pi. i. fig, 2 (1866). 



Eye rather small. Eostral much broader than deep, scarcely 

 visible from above ; internasals as long as broad, nearly as long as the 

 prsefrontals ; frontal once and a 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 pr£e- and three postoculars ; temporals 

 1 + 2 ; 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. Eeddish 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. Rhadinaea occipitalis. -^^ i-V' /- ^^^ 



Coronella elegans {non Tsch.), Gilnth. Cat. p. SB (1858). 

 Enicognathus occipitalis, Jan, Arch. Zool. Anat. Phys. ii. 186.3, 



p. 267, and Icon. Gen. 16, pi. i. fig. 1 (1866). 

 Dromicus (Lygophis) wuchereri, Giinth. Ann. ^ Mag. N. H. (3) 



xii. 1864, p. 225, fig. 

 Liophis reginas, part., Steind. Sitz. Ak. Wien, Iv. 1867, p. 268. 

 Dromicus miolepis, Boettg. Zool. Anz. 1891, p. 395. 

 Khadinsea occipitalis, Bouleng. Ann. ^ May. N. B. (6) xiii. 1894, 



p. 347. 



* I have examined a specimen from Cayenne, preserved in the Basle Museum. 



