40, SYNOPSES AND DESCRIPTIONS: 
and fourth labials; pupil round. Head-shields nine. Supraciliaries prom- 
inent. Frontal pentagonal. Muzzle prominent, extending beyond the 
lower jaw. Rostral bent back and sharp-angled between the internasals. 
Nasal entire, nostril near the center. Loreal present. Orbitals 1—2, 
lower small. Temporals 1+-2. Labials seven, sixth larger. Infralabials 
eight, fifth larger. Posterior submentals shorter. Seales smooth, in 15 
rows, medial narrow, outer broad. Ventrals 125—140. Anal bifid. 
Subcaudals 69—95 pairs. 
Grass green, whiter below. 
(Phyllophilophis.) 
CycLopHis AEsTIVUS, pl. ITI, jig. 1. 
Coruser Arstivus Linné, 1766, Syst. Nat., ed. XII, vol. I, 387. 
CycLopHis Arstivus Giiinther, 1858, Cat. Col. Snakes, 119. 
Body long, slender, compressed, with small neck and flat belly. Head 
distinct from the neck, elongate, with flat crown and pointed snout. Tail 
slender, more than half as long as the body. Eye large, pupil round. 
Mouth deeply cleft. Head-shields normal. Vertical. pentagonal. Snout 
prominent; rostral broad, reaching the top. Nasal entire, elongate, nostril 
in the middle. Loreal present. Orbitals 1—2, lower smaller. Temporals 
142. Labials seven, third and fourth in the orbit. Infralabials eight, 
fifth very large. Posterior submentals longer. Scales narrow, in 17 rows, 
keeled except on the outer or outer two, which are broader and smooth, 
Ventrals 150—165. Anal bifid. Subcaudals 110—135 pairs. 
Green, blue in alcohol, often with a reddish tint; belly white, greenish 
posteriorly. 
CoLUBER. 
Linné, 1754, Mus. Ad. Fridr.; Syst. Nat., ed. X, 1758, I, 216. 
Elongate, moderate to slender, slightly compressed; head distinct from 
the neck, somewhat narrow, crown flat, subquadrangular in transverse 
section at the eye; tail moderate to long and slender. Eye moderate, 
pupil round. Teeth becoming larger and longer posteriorly. _Crown- 
shields nine. Nasal divided. Loreal present, sometimes divided. Pre- 
oculars one to two. Postoculars two to three. Seales rhomboid, smooth 
or keeled, in 14 to 23 rows. Anal bifid. Subcaudals in two rows. 
(Bascanium.) 
