164. PHILODRYAS, 127 
164, PHILODRYAS. 
Philodryas, Wagler, Syst. Amph. p. 185 (1830). 
Chlorosoma, Wagler, 1. c. 
Xenodon, part., Schleg. Phys. Serp. ii. p. 80 (1837). 
Herpetodryas, part., Sch/eg. 1. ¢. mot : 
Lygophis, Tschudi, Faun. Per., Herp. p. 52 (1845). 
Dryophylax, part., Dum. § Bibr. Erp. Gén. vii. p. 1103 (1854). 
Oallizhinus (non Cuv.), Girard, Proc. Ac. Philad. 1857, p. 182, and 
U.S. Explor. Exped., Herp. p. 139 (1858). 
Philodryas, part., Giinth. Cat. Col. Sn. p. 123 (1858); Jan, Elenco 
sist. Ofid. p. 83 (1863). 
Euophrys (non Koch), Giinth. 1. c. p. 189. 
Galeophis, Berthold, Gotting. Nachr. 1859, p. 181. 
Teleolepis, Cope, Proc. Amer. Philos. Soc. xi. 1869, p. 153. 
Dirrhox, Cope, Proc. Amer. Philos. Soc. xxiv. 1887, p. 58. 
Atomophis, Cope, 1. c. 
Maxillary teeth 12 to 15, subequal, anterior smallest, followed, 
after an interspace, by a pair of large grooved fangs situated just 
behind the vertical of the posterior border of the eye; mandibular 
teeth, anterior longest. Head distinct from neck, with more or less 
distinct canthus rostralis; eye moderate or rather large, with 
‘round pupil. Body cylindrical or slightly compressed; scales 
smooth or keeled, with apical pits, disposed more or less obliquely 
in 17 to 23 rows; ventrals rounded or obtusely angulate laterally. 
Tail rather long; subcaudals in two rows. 
_ South America. 
Synopsis of the Species. 
I, Ventrals 157 or more. 
A. Scales strongly keeled, in 21 rows; ventrals 184-201; sub- 
caudals 120-140 ............ 1. estivus, p. 128. 
B. Scales smooth or feebly keeled, in 17 or 19 rows. 
1. Ventrals distinctly angulate laterally, 206-228 ; subcaudals 
106-131; scalesin 19 rows.. 2. viridissimus, p. 129, 
2. Ventrals rounded or indistinctly angulate. 
a. Rostral not much broader than deep. 
a. Internasals not longer than broad, shorter than the 
prefrontals, 
Scales in 19 rows; ventrals 175-198; 
subcaudals 94-126; green above.... 3. olfersii, p. 129. 
Scales in 19 rows; ventrals 157-199; 
subcaudals 74-119; loreal not longer 
than deep... i sp.c.ddige ete oes ks 4. schotti, p. 130. 
Scales in 17 rows; ventrals 168-187; 
. subcaudals 101-104 .............. 5. bolivianus, p. 132. 
Scales in 19 rows; ventrals 184-204; 
subcaudals 82-96; loreal longer than [p. 132. 
GOOD -i.< Laesinee Ree ates ins eens 6. psammophideus, 
