194 COLUBRID. 
a, Eye rather small ; frequently two preoculars. [p. 201. 
Scales in 17 or 19 rows ; woulivee 139-152. 1. leptocephalus, 
Scales in 21 or 23 rows; ventrals 152-172. 2. vagrans, p. 202. 
b. Eye moderate or large; a single preocular, [p. 203. 
a. Scales in 17 rows, all keeled . 3. chrysocephalus, 
8. Scales in 19 or 21 rows, the keel on the outer scale, if 
present, weaker than on the others; subcaudals not 
more than 100. 
Frontal hardly once and a half as long 
as broad; second row of scales feebly 
keooled vihsside os 00a Bib ahs ctwle ie sk sane ¢ 4. scaliger, p. 203. 
Frontal at least twice as long as broad .. 5. scalaris, p, 204. 
Frontal once and a half to once and three 
fourths as long as broad ............ 6. ordinatus, p. 205. | 
y- Scales in 19 rows, all with equally strong keels ; sub- 
caudals 86-127 .......... 7. saurita, p. 212. 
c. Eye moderate; two or three preoculars. [p. 214. 
8. multimaculatus, 
[p. 214. 
2. Second row of scales smooth .... 9. rufopunctatus, 
B. Anal entire ; two superposed anterior temporals. 
10. pealii, p. 214, 
C. Anal divided. 
1. Scales in 15 or 17 rows; usually’a single anterior tem- 
poral, 
a. 8 upper labials, euay three entering the eye; scales 
keeled. 
Scales strongly keeled; subcaudals more 
Chant Hatta nies aio this sia PTR 11. picturatus, p. 215. 
Scales feebly keeled, smooth on nape; 2 
PostoclARe rice se Fs Kab art en & anes 12. truncatus, p. 216. 
Seales feebly keeled, smooth on nape; 3 A 
postoculars..... stabs tisoleacels ancete wee 13. celebicus, p. 216, , 
6. 8 upper labials, two entering the sit ; Scales smooth, | 
penieg.in 17 rows: .::.s0 sa ene Yas aves 4. fuliginoides, p. 217. 
Scales in 15 rows... 2). savas ae 15; variegatus, p. 217. 
c. 6 upper labials, two entering the eye. 
Scales strongly keeled; head narrow and 
elongate...» »s.0.0 5:2 sits serersiethe pene 16. swinhonis, p. 218, se 
Seales very feebly keeled; a groove along > 
the middle of the nape ............+: a7. nuchalis, p, 218. 
