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Synopsis of the Species. 
I. Eyes latero-superior, separated from each other by five or more 
longitudinal series of scales. . 
A. Rostral without angular edge; 8 to 10 keeled scales from eye 
to eye across the forehead ; tail pointed; scales in 40 to 
MURS corso on 5.'dv-a-0 pineal 1. conicus, p. 124. 
B. Rostral with a sharp horizontal edge ; head-scales smooth. 
1. Tail pointed, ending in a conical scute; 12 to 15 scales from 
eye to eye across the forehead ; scales in 47 to 53 rows. 
2. thebaicus, p. 125. 
2. Tail obtuse; 5 to 9 scales from eye to eye across the fore- 
head. 
40 to 50 scales across the body ; ventrals 165- 
SN pias Gis a'n i 0 0 0 OPC REM «vedas 3. jaculus, p. 125. 
54 to 65 scales across the middle of the body ; 
ventrals 194-210 .......ccsssuseseeee 4. johnii, p. 127. 
36 scales across the body ; ventrals 184 ..... 5. elegans, p. 128, 
