. Bulletin of the American Museum of Natural History. Natural history; Science. 82 Bulletin American Museum of Natural History [Vol. XLIX Diagnostic Characters Habitus slender, tail more than a third the total length, eye large, its diameter equaling the length of the snout. A pair of very large occipital shields; dorsal scales smooth, very oblique, in fifteen rows, the vertebral row enlarged. Ventral plates 159- 172, subcaudals 134-150. Detailed Description Type.—A. M. N. H. No. 12505, 9 . Habitus of arboreal species, tail .34 of the total length. Ej-e very large, the diameter equaling the le
. Bulletin of the American Museum of Natural History. Natural history; Science. 82 Bulletin American Museum of Natural History [Vol. XLIX Diagnostic Characters Habitus slender, tail more than a third the total length, eye large, its diameter equaling the length of the snout. A pair of very large occipital shields; dorsal scales smooth, very oblique, in fifteen rows, the vertebral row enlarged. Ventral plates 159- 172, subcaudals 134-150. Detailed Description Type.—A. M. N. H. No. 12505, 9 . Habitus of arboreal species, tail .34 of the total length. Ej-e very large, the diameter equaling the length of the snout, pupil round. Snout flattened, obtusely truncate, canthus rostralis Fig. 4. Dorsal and lateral views of head and front view of rostral of Rhatnnophis ituriensis, new species, (12505, type, X 2). Rostral much wider than high, narrowly visible from above. Internasal suture slightly longer than the prefrontal; prefrontals extending on the sides of the snout to theloreal; nasal divided; loreal once and a half as long as high; frontal as long as its distance from the end of the snout, slightly shorter than the parietals, five-sided, the lateral sides straight, converging behind; parietals nearly as wide as long; two very large occipitals, one in contact with the eighth labial, the other narrowly separated from it; one preocular, not reaching the frontal; two postoculars; a single large temporal; eight upper labials, the fourth and fifth entering the eye; nine lower labials, the first five in contact v/ith the anterior chin shields; three pairs of chin shields, the second largest. Dorsal scales smooth with apical pits, in 15-15-11 rows, very oblique; the vertebral row strongly enlarged, its scales at least twice as wide as the adjacent laterals. Ventrals 166, obtusely angulate, without keel; anal divided; subcaudals divided, 140. General color above bluish black, the center of each scale with a lighter bluish line, these making four continuous light line
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