146 



imOPELTID^. 



213 ventrals ; diameter of body 38 times 



iu total length ; rostral half length 



of shielded part of head 12. macrorhynchus, 



180-188 ventrals ; diameter of body 33 [p. 153. 



to 40 times in total length 13. beddomii, p. 153. 



2. Eye half the length of the ocular, or more ; snout obtuse. 



a. Portion of rostral seen from above longer than its distance 

 from the frontal, 

 144-157 ventrals ; diameter of body 28 



to 38 times in total length ; rostral 



one third length of shielded part of 



head 15. pldpsonii, p, 155. 



139-153 ventrals ; diameter of body 25 



to 32 times in total length ; rostral 



not quite one third length of shielded 



part of head 17. myhendra', p. 156. 



h. Portion of rostral visible from above as long as its dis- 

 tance from the frontal. 

 142-150 ventrals ; diameter of body 30 



to 32 times in total length 18. madurensis, p. 156. 



127-136 ventrals ; diameter of body 25 [p. 157. 



to 33 times in total length 19. rubromaculata, 



c. Portion of rostral visible from above shorter than its 

 distance from the frontal. 

 128-130 ventrals ; diameter of body 26 

 or 27 times in total length ; eye half 



length of ocular 20. arcticejjs, p, 157. 



120-146 ventrals ; diameter of body 21 

 to 29 times in total length ; eye more 

 than half length of ocular 21. brevis, p. 158. 



III. 15 scales round the middle of the body ; 128-140 ventrals ; 

 diameter of body 24 to 29 times in the total length. 



22. macrolejns, p. 159. 



1. Silybura melanogaster. 

 Mytilia (Crealia) melanogaster, Gray, Proc. Zool. Soc. 1858, p. 264, 



%• 

 Plectrurus ceylouicus, Peters, Mon. Berl. Ac. 1869, p. 388. 

 Rlnnophis melanogaster, Peters, Uropelt. p. 18, pi. ii. fig. 4 (1864) ; 



Jan, Icon. Gen. p. 47, 1. 9, pi. ii. tig. 4 (1865). 

 blvthii, part., Gimth. Rept. Brit. Lid. p. 186 (1864) ; Theoh. 



_ Cat. 'Itejjt. Brit. Ind. p. 130; 1876). 

 Silybura melanogaster, Beddome, Ann. S," Mac/. N. H. (5) xvii. 1886, 



p. 20 ; Bouleng. Faun. Ind., Rept. p. 260 (1890). 



Snout pointed ; rostral about one third the length of the shielded 

 part of the head, the portion visible from above longer than its 

 distance from the frontal, entirely separating the nasals; frontal 



