aes. ” he see _ a. east oe eae ies 
: * . . ,: ? 
382 : COLUBRID, : ia 
y- Eight upper labials ........ 19. elegantissimus, — 
[p. 402. 
3. Scales in 21 or 23 rows; two labials enter the eye. 
a. One preocular (rarely divided), with a subocular belowit; ‘- 
scales smooth, 
Nine upper labials; subcaudals not more 
than 100° SOs Wea aca oeicnea cn en 20, florulentus, p. 402, Be | 
Nine upper labials ; subcaudals more than 
100. vicdacent ete o's tao Dat + Palate a ea 21. gracilis, p. 404. 
Eight upper labials ; subcaudals less than 
100; pscnres Ko ou wale KH ele Alka EE 22. fasciolatus, p. 404. 
b. Two preoculars in addition to the subocular; scales with 
an obtuse or faint keel...... 23. ravergiert, p. 405. 
4. Scales in 23 or 25 rows, usually a single labial enters the 
eye. 
a. Two preoculars in addition to the subocular. 
Scales obtusely or faintly keeled ; ventrals 
197-216; subcaudals 79-101 ........ 24. nummifer, p. 407. 
Scales perfectly smooth ; ventrals 219-228 ; , 
subcaudals 107-119 .............08, 25. socotre, p. 408. 
b. One preocular, with a subocular below it; ventrals 214- 
232; subcaudals 87-104 .... 26. algirus, p. 408. 
5. Scales in 25 to 29 rows; eye usually separated from the 
labials by suboculars........-. 27. hippocrepis, p. 409. 
6. Scales in 31 rows; two labials entering the eye. 
28. dorri, p. 410. 
Il. Preefrontals broken up into three or more shields; eye sepacales 
from the labials by suboculars ; anal entire. 
A. Seales in 25 to 33 rows; 10 to 13 upper labials. 
Rostral as deep as broad or a little broader 
BOR GOI 5-55 oS sins ccocutenis ene aber 29. diadema, p. 411. 
Rostral aah deeper than broad, wedged in 
far between the internasals .......... 30. arenarius, p. 413. 
B. Scales in 41 to 43 rows; 14 or 15 upper labials. 
31. microlepis, p. 413, 
As has been done for the genus T'rropidonotus, a table is endl 5 
showing the numbers of scales and shields in the different species, _ 
with the object of facilitatirg the identification of specimens:— 
- 
