1, mysta. 133 
1. ILYSIA, 
Tortrix (non Linn.), part., Oppel, Ordn. Rept. p. 55 (1811); Schleg. 
Phys. Serp. ii. p. 1 asi). ee y : 
Anilius, part., Oken, Lehrb. Naturg. iii. p. 283 (1816). 
Ilysia, .-» Hemprich, Grundr, d. Naturg. (1820) * ; Fitzing. N. 
P 
Tlysia, Wagler, Icon. Amph. (1828), and Syst. Am . 193 (1830). 
Tortrix, Dum. & Bibr. Erp. Gén. vi p. Cia roto Cat. Sn. 
p. 113 (1849) ; Jan, Icon. Gén, Ophid, p. 64 (1865). 
Teeth moderate, subequal, 9 or 10 in each maxillary ; small teeth 
in the premaxillary. Head very small, not distinct from neck; 
eye extremely small, with round pupil, in an ocular shield; large 
symmetrical shields on the head ; nostril in a single nasal, which 
forms a suture with its fellow behind the rostral; no loreal, pre- 
ocular, or postocular ; no mental groove. Body cylindrical; scales 
smooth, in 19 or 21 rows; ventrals feebly enlarged. Tail extremely 
short and blunt. 
South America. 
1. Ilysia scytale. 
ae seytale, Linn. Mus. Ad. Frid. p. 21, pl. vi. fig. 2 (1754), and 
N. i. p. 391 (1766); Laur. fia Rept. p. 70 (1768) ; Daud. 
Rept. vii. p. 302, pl. lxxxvii. fig. 1 (1803). 
— annulata, Laur. /. c. p. 69. 
—— fasciata, Laur. l. c. p. 70; Daud. l. ¢, p. 306. 
-— corallina, Laur. l. c. p. 71. 
—— cerulea, Laur. l. c. 
Fats viptale, Oppel Ordn. Rept. p. 56 (1811); Sckleg. Phy 
ortrix scytale, Oppel, in. t. p. : . Phys. le 
ii, p. 5, pl. 1. figs. 4 & 5 (1837), and Adbild. p, 110, pl. st 
figs. 1-4 (1844); Dum. § Bibr. se 585 (1844); Gray, Cat. Sn. 
p- 114 (1849) ; Jan, Icon. Gén. p. 55, pl. iii, (1865). 
—— coralinus, Oppel, l. ¢. 
Ilysia scytale, Lichtenst. Verz. Doubl. Mus. Berl. p. 104 (1823); 
Wagler, Icon. ye pl. v. fig. 2 (1828). 
Torquatrix scytale, Gray, Ann. Phil, x. 1825, p, 209. 
A pair of very large prefrontals ; frontal rather small, longer 
than broad, usually in contact with a nearly equally large occipital ; 
supraocular and parietal subequal in size, and scarcely larger than 
the scales on the back of the head; five or six upper labials, third 
and fourth in contact with the ocular. Scales in 19 or 21 rows. 
Ventrals 210-244 ; anal entire ; subcaudals 9-14. Red (yellowish 
in spirit), with more or less complete black annuli; the dorsal scales 
sometimes edged with brown. 
Total length 830 millim. 
_ Guianas and Upper Amazon. 
* The author has not been able to refer to this work. 
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