216 COLUBRID. 
Suture between the internasals as long 
as or shorter than that between the 
preefrontals ; frontal moderate .... 3. cyclurus, p. 219. 
6. A sitigle anterior temporal. 
Portion of rostral seen from above 
shorter than its distance from the 
BRSVUE EEL hau Ato: wc 's by ofan cache Shela phone 4. albocinctus, p. 220. 
Portion of rostral seen from above as 
long as its distance from the frontal. 5. formosanus, p. 222. 
2. Scales in 17 rows. 
a. Fourth and fifth labials entering the eye; a single 
anterior temporal...... .- §. violaceus, p. 222. 
6. Fourth or third and fourth labials entering the eye. 
a. A single labial entering the eye; a single anterior 
J itenpomall:2's Peace eels 7. woodmasont, p. 223. 
f. Two labials entering the eye; two superposed anterior 
temporals .6 .fa0..... 8. octolineatus, p. 224. 
y. Two labials entering the eye; a single anterior tem- 
poral. 
* Two postoculars. 
Loreal longer than deep ............ 9. phenochalinus, p. 225. 
Loreal rather deeper than long ...... 10. forbesiz, p. 225. 
** One postocular. 
PGHIES SEMLOOEM o1 toy ctece a wt! la dias «wes 11. signatus, p. 226. 
Seales feebly keeled .,...........5 12. subcarinatus, p. 226. 
3. Scales in 15 rows .......... 13. annulifer, p. 226. 
B. Portion of rostral visible from above much shorter than its 
distance from the frontal; scales in 17 or 19 rows. 
. Temporals 1+1+2; ventrals 146-169 ; 
pubcaudals S047 wis. .wise oe teae th 14. teniatus, p. 227. 
Temporals 1+ 2 or 2+2; ventrals 170- 
191; subcaudals 55-60 .......... 15. chinensis, p. 228 
II. Anal divided. 
HL.) SCBLES ATE LO BOWS. vies 's a, s.0is.0 +0 16. vaillanti, p. 228. 
B. Scales in 17 rows. 
1. Nasal undivided ; fourth and fifth labials entering the eye ; 
ventrals 167-168; subcaudals 43-46, 
17. beddomii, p. 229. 
2. Nasal divided, rarely semidivided. 
Third and fourth labials entering the 
eye; ventrals 170-202; subcaudals 
PRM O SSS... iia ech ee ee ee eae 18. arnensis, p. 229. 
