13. CEOTAIUS. 579 



pL ix. &g. 1 (1883); Cope, Proe. U.S. Nat. Mus. xiv. 1892, p. 693: 



Hay, Batr. Rept. Ind. p. 128 (1898) ; Stejneger, Rep. U.S. Nat. 



Mus.f. 1893, p. 426, pi. ix. (1895). 

 ■Crotalophorus horridus, Houtt. Unn. Nat. Hist. vi. p. 809 (1764). 

 •Oaudisona dunssus {non L.), Laur. Syn. Rept. p. 93 (1768). 



r^an '"''1'^^''^' P*^*-» ^<^^P- Serp'.ii. pp. 130, 190, pi. xviii. fig. 1 



boiquira, Pal. de Beam. Trans. Amer. Phihs. Soc. iv. 1799, 



p. 368, pi. — . 

 dunssus, Latr. Rept. iii. p. 190 (1802) ; Daud. Rept. v. p. 304, 



pi. Ixviii. (1803) ; Harl. Proc. Ac. Philad. v. 1827, p. 368, and Med. 



Phys. Res. p. 182 (1835) ; Schkg. Phys. Serp. ii. p. 565, pi. xx. 



flga. 15 & 16 (1837) ; Storer, Rep. Rept. Massach. p. 233 (1839) ; 



Holbr. N. Am. Herp. ii. p^ 81, pi. xvii. (1838), and 2nd ed. iii. 



p. 9, pi. i. (1842) ; Be Kay, N. rork Faun. iii. p. 56, pi. ix. 



flg. 19 (1842) ; Baird ^ Gir. Cat. N. Am. Rept. p. 1 (1853) ; Baird, 



Serp. N. York. p. 9, pi. i. fig. 1 (1854) ; Bum. 8f Bibr. vii. p. 1465, 



pi. Ixxxiv. b. fig. 1 (1854) ; Jan, Icon. Ghi. 46, pi. i. (1874). 

 - — atricaudatus, Latr. t. c. p. 209 ; Daud. t. c. p. 316. 

 Crotalinus cyanurus, Rafin. Amer. Monthly Mag. iii. 1818, p. 446 *. 

 Caudisona horrida, Flem. Philos. Zool. ii. p. 294 (1822) : Cope, Proc. 



Ac. Philad. 1866, p. 309. 

 Uropsophus durissus, Gray, Cat. p. 19 (1849). 

 Crotalua horridus, part.. Gray, I. c. p. 20. 



Snout with obtuse canthus. Eostral as deep as broad, in contact 

 ■with the anterior nasals and a pair of rather large internasals ; a 

 large shield between the internasal and supraocular; middle of 

 snout with scales or small shields ; supraoculars considerably 

 narrower than the space between them, which is covered by 3 to 

 8 longitudinal series of small scales ; three or four series of scales 

 between the eye and the labials ; 12 to 16 upper labials. Scales 

 in 23-29 rows, dorsals very strongly keeled. Ventrals 165-178 ; 

 anal entire ; subcaudals 19-29. Greyish brown above, usually 

 with a rusty vertebral stripe and V- or M-shaped blackish cross- 

 bands ; head uniform above, with a more or less distinct dark band 

 from the eye to the angle of the mouth ; usually a pair of roundish 

 or triangular dark spots on the nape ; neck with elongate spots or 

 interrupted stripes ; yellowish beneath, uniform or speckled or 

 spotted with blackish ; end of tail blackish. 



Total length 1340 millim. ; tail 135. 



United States, from Massachusetts and Iowa to Northern Florida 

 and Texas. 



a. cJ (Sc. 25 ; V. 178 

 C. 29). 



b. Yg. (Sc.26; V. 170 

 C. 24). 



c. Yg. (Sc.25; V.177 

 C. 21). 



d. S (Sc. 29; V. 176 

 C. 24). 



New Orleans. 



Texas. 



Arkansas. 



N. America. Sir H. Sloane [P.], 



I have not been able to verify this reference. 



2p2 



