282 COLTJBRID.'E. 



1. Tretanorhinus variabilis. 



Tretanoi'hiniis variabilis, part., Diim. ^- Bihr. vii. p. .'540, pi. Ixxx, 



lig. 4 (lSo4) ; Jan, Arch. Zool. Anat. IVii/s. iii. 1865, p. 254 j 



Gimdlach, Erp. Cub. p. 80 (1880). 

 -^.Tropidonotus cubauus, Gundlach, Man. Berl. Ac. 1861, p. 1001, and 



I. c. p. 81. 

 Tretanorhinus variabilis, Co2)e.i Proc. Ac. FMlad. 1861, p. 298, and 



1868, p. 309 ; Bocuurf, Le Natur. 1891, p. 122. 

 Helicops wagleri, Jan, I. c. p. 247, and Icon. Gen. 28, pi. i. fig. 1 



(1868). 

 Tretanorhinus variabilis, var. adnexus, Jan, I. c. ; Bocourt, I. c. p. 208. 

 Helicops variabilis, part., Garman, N. Am. Rept. p. 33 (1883). 



Head narrow and elongate ; eye rather small ; nasals in contact 

 with each other behind ttie rostral, or narrowly separated ; inter- 

 nasals small, longer than broad ; frontal as long as its distance 

 from the end of the snout, shorter than the parietals ; loreal 

 elongate ; one or two pra3- and two postoculars ; temporals 1 + 2 ; 

 eight upper labials, fourth entering the eye ; four or five lower 

 labials in contact with the anterior chin-shields ; posterior chin- 

 shields a little longer than the anterior and separated from each 

 other by scales. Scales in 19 rows, keeled, the keels strongest on 

 the tail. Ventrals 131-164 ; anal divided ; subcaudals 50-78. 

 Olive or blackish above, with or without blackish cross bands ; a 

 more or less distinct light lateral streak on the second and third 

 rows of scales ; a dark streak on each side of the head, passing 

 through the eye ; belly orange or red, dotted or spotted all over 

 with brown, or brown dotted with paler. 



Total length 660 millim ; tail 100. 



Cuba. 



a-h. S (V. 160, 158; C. 69, 68). Cuba. 



e. c? (V. 155; C. 68). Cuba. Prof. Peter.s fP.].. 



2. Tretanorhinus nigroluteus. 



Tretanorhinus variabilis, part., Dum. 4* Bihr. vii. p. 349 (1854) ; 



Jan, Arch. Zool. Anaf, Phys. iii. 1865, p. 254. 

 niproluteus, Co2w, Proc. Ac. Philad. 1861, p. 298, and 1868^ 



p. 309 ; Gi'mth. Ann. c^_ Man. ^- -K (4) ix. 1872, p. 27 ; Cope^ 



Proc. Am. Philos. Soc. xxii. 1885, p. 183; Bocourt, Le Natur. 1891, 



p. 122. 

 Helicops agassizii, Jan, J. c. p. 248, and Icon. Gen. p. 28, pi. ii. fig. 1 



(1868). 

 — ~ variabilis, part., Garman, N. Am. Bept. p. 33 (1883). 



nigrokiteus, Garm. I. c. p. 144. 



bifrenatus, Bocourt, Bull. Soc. Philom. (7) viii. 1884, p. 194. 



Hegina nigrolutea. Cope, Bull. U.S. Nat. Mus. no. 32, 1887, p. 74. 

 Tretanorhinus lateralis, Bocourt, I. c. 



Very closely allied to the preceding, but differing in the following 

 points : — Usually two loreals, anterior smallest ; two or three 

 praeoculars ; posterior chin-shields in contact with each other 

 anteriorly ; scales in 21 rows. Olive or blackish above, uniform or 



