1004 REPORT OF NATIONAL MUSEUM, 1898. 



EUTyENIA CHRYSOCEPHALA Cope. 



I'JuUenia chrysocephala Coi-J;, Proc. Amer. I^liil. So<;., 1884, pp. 173, 174; Bull, U. S. 



Nat.Mus., No. 32, 1887, p. 73; Proc. U. S. Nat. Mus., XIV, 1892, p. 647.— 



BocOT-HT, Miss. Sci. Mex., 1893, p. 762. 

 Tropidohotiis chrijsocephahix I^oulkngek, Cat. Snakes Brit. Mus., I, 1893, ]i. 203. 



Scales in sevejiteen rows, inferior row heeled; nrosteges, eiglityone; 

 no dorsal stripe ; a large black nuchal spot; head yellow; body slendrr, 

 with a wide flat head, with a large eye. The size of the latter con- 

 tracts the frontal plate, so that it is not wider than the superciliaries 

 posteriorly. The scuta are otherwise as usual. Superior labials, eight, 

 none higher than long, fourth and fifth below the orbit. The inferior sur- 

 faces are darker than in E. eques collaris, which causes a better definition 

 of the lateral line than in that species. There are rei)resentations of 

 two rows of lateral black spots, but they are merely black scale borders, 

 those of the inferior row the more distinct. A similar row of black 

 edges on the first row of scales. All of these spots become distinct on 

 the sides of the neck. IsTuchal spot large, black, and with a shallow 

 notch behind, no occii)ital or other spots on the head. The gastrosteges 

 have black bases, a character not seen in any of the other species 

 referred to. 



Gastrosteges, one hundred and fifty-one. 



Measurements. — Total length, 430 mm.: length of tail, 135 mm., or 

 one-third the total. 



This handsome species was obtained at Orizaba by Dr. Sumichrast. 

 Boulenger ' records it from Omilteme, in the State of Guerrero, which 

 is at an elevation of 8,000 feet. 



Jiiitdhia rhrysoeephala Cope. 



EUT^NIA SIRTALIS Linnaeus. 



Ellin via fsirtaUx Cope, Cbeck-list N. Aiiier. Batr. Kept., 187.5, p. 41. 



fCnIainia slrtalix Baikd aiulGiRAJii), Cat. N. Amer. Kept., Pt. 1, Serp., 1853, p. 31. 



Coluber sirtalis Linn.eus, Syst. Nat., I, 1766, p. 383.— Gmf.lin, LiuuK'US, Syst. 



Nat., 13tlied., I, Pt. 3, 1788, p. 1107.— Fitziniikr, Neue Class. Keptilieu, 1826, 



]). 58.— Harlan, Jonrn. Acad. Nat. Sci. Phila., V, 1827, p. 3.52.— Storkr, Rej). 



Rept.Mass.,1839, p. 221. 

 Tropiilonoiiis sirtalis Holuhook, N. Amer. Herp., III. 1842, j). 41, pi. xi. 

 Tropidoiiotus hipunctalus Schlei;kl, P^ss. Phys. Serp,, 1837, )». 320. — Dumkhil au«l 



HiHKON, Erp. Gcu., VII, 1854, p, .582. 

 Tropidonotiis tauia DeKay, New York Fauna, Rept., 1842, p. 43, pi. xiil, fig. 27. 

 Coluher ordinafiis Linn.eus, Syst. Nat., I, 1766, p. 379. — Merue.m, Tentanien, p. 93. 

 Tropidonoiiis ordiiiatiis BoiE, Isis von Oken, 1827. p. 535. — Holbhook, N. Amer. 



Herp., IV, pi. XII.— GCiNTHER, Cat. Colubr. Snakes Hrit. Mus., 1858, p. 73. 

 TropidouotHx ordinaiux var. sirtalis Boui.kngek, Cat. Snakes Brit. Mus., I, 1893, 



p. 206, 



Cat. Snakes Brit. Mus., I, p. 202. 



