582 viPERiD.aE. 



d. 9 (Sc. 23 ; V. 147 ; Orizaba, Vera Cruz. 



C. 24). 

 e-f. $ (Sc. 21 ; V. 184 ; Omilteme, Guerrero. Mr. H. H. Smith 



C. 19) & yg. (Sc. 21 ; [C.]; F. D. God- 



V. 177 ; 0. 24). man, Esq. [P.]. 



(Types of C. omiUemamts.y 

 F. D. Godman, Esq, 



[P.]. 

 M. SalM [0.]. 



9. Crotalus polystictus. 



Crotalus lugubris, part., Jan, Rev. 8f Mag. Zool. 1859, p. 156. 

 Caudisona polysticta, Cope, Proc. Ac. Philad. 1865, p. 191, and 1866, 



p. 809. 

 Crotalua lugubris, var. multimaculata, Jan, Icon. G^. 46, pi. iii, 



fig. 3 (1874). 



jimenezii, Dugis, Naturaleza, iv. 1876, p. 23, pi. i. figs. 18-20. 



polystictus. Cope, Proc. Amer. Philos. Soc. zxii. 1885, p. 179 ; 



Bugis, Naturaleza, (2) i. 1888, p. 134; Cope, Proc. U.S. Nat. Mus. 



xiv. 1892, p. 689 ; Gunth. Biol. C.-Am., Sept. p. 192 (1895). 



Closely allied to C. triseriatus, but four internasals, 14 or IS 

 upper labials, and scales in 27 to 30 rows. Ventrals 123-151 ; 

 subcaudals 18-23. Elegantly marked with six or seven longi- 

 tudinal series of alternating elongate dark brown, black-and-white 

 edged spots separated by narrow interspaces of the yellowish-brown 

 ground-colour ; a pair of diverging dark bands on the top of the 

 head, divided by a light line across the supraocular shields, an 

 oblique dark band below the eye and another from the eye to the 

 angle of the mouth ; these dark bands separated by narrow pinkish- 

 white streaks; pinkish or yellowish beneath, spotted with dark 

 brown. 



Total length 600 millim. ; tail 60. 



Tableland of Mexico. 



10. Crotalus lepidus. 



Caudisona lepida, Kennicott, Proc. Ac. PhUad. 1861, p. 206. 



Aploaspis lepida. Cope, Proc. Ac. Philad. 1866, p. 310. 



Crotalus lepidus. Cope, Proc. Ac. Philad. 1883, p. 13 ; Oarm. N^ 

 Am. Sept. p. 117 (1883) ; Cope, Proc. U.S. Nat. Mus. xiv. 1892, 

 p. 689; Stejneger, Rep. U.S. Nat. Mus. f. 1893, p. 452, pi. xvi, 

 (1895). 



palmeri, Garm. Bull. Bssex Inst. xix. 1887, p. 124. 



Canthus rostralis obtuse. Eostral broader than deep, in contact 

 with the nasal, which is semidivided ; upper surface of snout with 

 eight small smooth shields ; supraoculars as broad as the space 

 between them, which is occupied by three series of scales ; upper 

 praeocular divided vertically ; two series of scales between the eye 

 and the labials ; 12 upper labials. Scales in 21 or 23 rows, dorsals- 

 strongly keeled. Ventrals 153-169 ; anal entire ; subcaudals 24-31- 

 Brown or greenish grey above, with distant dark brown or jet-black 



