DIPSAS.—DRYIOPHIS. 177 
5. Dipsas gracillima, sp.n. (Tab. LVI. fig. B.) 
Hab, Souruurn Mexico (Godman). 
Body very slender and compressed. Scales in seventeen rows, those of the vertebral 
line not enlarged ; ventrals 244; subcaudals about 110. 
Head moderately broad; loreal a little longer than deep ; one anteocular, which 
does not reach the vertical ; two postoculars ; eight upper labials, the third, fourth, 
and fifth entering the orbit ; temporals 1+2-+43. 
Light brownish, with about seventy-four brown cross-bands edged with darker, 
and about twice as broad as the interspaces between them. ‘The spots on the tail 
are more indistinct and irregular. 
The length of the entire specimen is 214 inches, of which the tail takes 54. 
DRYIOPHIS. 
Dryiophis, sp. (Boie), Fitzinger, N. Class. Rept. 1826, pp. 29, 30, 60. 
Tragops et Oxybelis, Duméri] & Bibron, Erpét. vii. pp. 813, 822. 
1. Dryiophis acuminata. 
Coluber acuminatus, Wied, Abbild. Lief. 14, t. 1. 
Dryiophis acuminata, Giinth. Cat. Col. Sn. p. 156; Cope, Proc. Ac. N. Se. Phil. 1861, Pp. 555 ; 
Cope, Bull. U.S. Nat. Mus. no. 32, p. 68. 
Dryinus eneus, Wag). in Spix, Serp. Brasil. p. 12, t. 3. 
Oxybelis eneus, Wagl. Syst. Amph. p. 183; Dum. & Bibr. Erpét. vii. p. 819. 
Dryinus auratus, Bell, Zool. Journ. 1825, p. 329, t. 12. 
Drytophis aurata, Schleg. Ess. ii. p. 255, t. 10. figg. 16-18. 
Dryiophis vittatus, Girard in U. 8. Naval Astron. Exped., Rept. p. 211, t. 36. 
Hab. Mexico, 'Tres Marias Is., Presidio (Forrer), Guaymas, Tuxpan, and Tabasco (Cope), 
Sarabia and Santo de Domingo de Guzman (A. C. Buller), Tepetlapa in Guerrero 
(H. H. Smith), Coatzocoalcos R. (U. S. Nat. Mus.), Tehuantepec (Sumichrast), 
Yucatan (Mus. Brit.), Bonacca I. (Gaumer); Guaremata, Rio Motagua (Salvin) ; 
Honpuras (Mus. Brit.), Ruatan I. (Gawmer); Satvavor (Dow); Nicaragua 
(U. S. Nat. Mus.) ; Costa Rica, Irazu (Rogers); Panama, V eraguas and Taboga I. 
(U. S. Nat. Mus.).—Sovuta America to Southern Brazil. 
Specimens of this widely spread and common species vary particularly in the extent 
of the preocular, which frequently reaches the vertical, and in the comparative length 
of the vertical and occipital shields. It ranges from the Mexican State of Sonora to 
Southern Brazil. 
BIOL. CENTR.-AMER., Rept., July 1895. 
