32 



COLUBEID^. 



young. Ventrals without keel, 184-215 ; anal entire ; subcaudals 

 53-83. Brown to black above, yellow to black interiorly. 



Total length 1880 millim. ; tail 400. 



From the Southern United States to Brazil and Bolivia. 



A. Belly and lower surface of tail uniform yellow ; no black on tlie 



labials. (C. corals, Boie ; 0. flaviveniris, Steind.) 



a. 2 (V. 215; C. 72). Trinidad. 



6. 5 (V. 210; 0, 71). Demerara. 



c. <J (V. 203; 0. 79). Berbice 



d. 2 (V. 206; 0.78). 



e. d (V. 178; C. 81). 

 f,ff. 2 (V. 211; 0. 77) 



yg. (V.202; 0.77). 

 Ji. d (V. 212; 0.?). 

 i. 2 (V. 202 ; 0. 72). 

 A-. cJ (V. 203; 0.73). 

 /. d (V. 204 ; 0. 76). 

 m. 2 (V. 215; 0.76). 

 n. Skull. 



B. Lower surface of tail black ; belly with the shields often black- 



edged or entirely black towards the tail ; at least the labials 

 below the eye with deep black bars on the sutures ; usually an 

 oblique black streak on each side of the neck. ( O. melanurus, 

 D. & B. ; 0. coUaris, Steind.) 



a. Yg. (V. 184 ;_C. 61). Duval Co., Texas. 



Presidio, near Ma- 

 zatlan. 



b. 2 (V. 190; 0.69). 



c-d. 2 (V. 203, 200 ; C. 



77, 81). 



e. 2 (V. 189 ; 0. 60). 



/. Hgr. (V. 197; C. 71). 



<,. Yg. (V. 193; 0.77). 

 h.i. d (V.196; 0. 77)& 



'jg. (V. 195; 0.76). 

 k. Hgr. (V. 199; 0.77). 



I. Yg. (V. 209; 0.73). 

 m,n. c? (V. 198; 0. 75) 

 & 2 (V. 198 ; C. 71). 

 0. c7 (V. 198; 0.76). 

 p. d (V. 202: 0.77). 

 q-r. Yg. (V. l92, 203 ; 0. 



78, 76). 



C. Nearly entirely black. 

 O. erebennus, Cope.) 



a, b. d (y. 189 ; 0. 68) & 



hgr. (V. 189; 0.73). 

 c. $ (V. 198; C. 65). 



Tres Marias Ids. 



Tampico, 



Teapa, Tabasco. 



Oaxaca. 

 Yucatan. 



W. Taylor, Esq. [C.]. 

 Hr. A. Forrer [0.]; 



F. D. Godman, Esq. 



[P.]. 

 Hr. A. Forrer [C.]. 



F. D. Godman, Esq. 



[P.]. 

 F. D. Godman, Esq. 



[P.]. 

 M. Sal\6 [0.]. 



Stann Creek, Brit. Rev. J. Robertson 



Honduras. 

 San Geronimo. 

 Duenas, Guatemala. 



Lanquin, Guatemala. 

 Guatemala. 

 Cartago, Costa Rica. 



[0.]. 

 0. Salvin, Esq. [0.1. 

 0. Salvin, Esq. [0.]. 



O. Salvin, Esq. [0.1. 

 0. Salvin, Esq. [O.J. 



(C. obsoletus, Holbr. ; C couperi, Hoibr. ; 



Mexico. 

 Atoyao, Mexico. 



Mr. H. Finck [0.]. 



F. D. Godman, Esq. 



[P.]. 



