818 



REPORT OF NATIONAL MUSEUM, 1898. 



All of the species have seventeeu longitudinal rows of scales. They 

 differ as follows : 



I. Tail one-fourth of total length or shorter; superior labial plates eight. 



Rostral plate wider, more free laterally ; temporal scales 2, 3, 4 ; bluish or yellow- 

 ish, with a brown stripe on each side of a yellowish dorsal stripe. 



S. grahamicB Baird and Girard. 

 Rostral plate narrower, less free laterally ; temporal scales 2, 2, 3 ; olivaceous, 

 with two brown stripes on each side of a narrow light brown dorsal stripe. 



S. hairdii Jan.' 



II. Tail oue-third total length; superior labial plates, nine. 



Rostral plate narrower, less free at the sides; temporal scales 2- 2- 2. Yellow- 

 ish, with two brown bands on each side of a dorsal stripe, anteriorly broken 

 up into parallel narrow lines and crossed by brown crossbars near the head. 



S. mexicana Dumo'ril and Bibron.^ 



SALVADORA GRAHAMIiE Baird and Girard. 



Salvadora grahamiw Baird and Girard, Cat. N. Amer. Rept., Pt. 1, Serp., 1853, p. 



104.— Baird, U. S. Mex. Bound. Surv., II, 1859, Reptilia, p. 21, pi. v, fig. 2.— 



Cope, Bull. U. S. Nat. Mus., No. 32, 1887, p. 72.— Jan, Icon. Gen. Ophid., Pt. 1, 



pi. Ill, fig. 2. 

 Phimothyra grahamiw CoPE, Proc. Acad. Nat. Sci. Phila., 1860, p. 304; Check-list 



N. Amer. Batr. Rept., 1875, p. 38. 

 Zamenis grahami Boulenger, Cat. Snakes Brit. Mus., 1, 1893, p. 393. 



A dorsal ochraceous band or vitta, on each side of which a black one 

 of the same width. Flanks yellowish green. Abdomen uniform dull 



yellow. Dorsal scales in sev- 

 enteen rows; superior labials 

 eight. Tail about one-fourth 

 of total length. 



Head conical, rostral plate 

 very large, triangular, with 

 edges free, appearing as if 

 fastened on the outside of the 

 snout after all the others had 

 taken their place. Interna- 

 ^.^ ^gg sals proportionally large, 



SALVADORA ouauaZm bIird AND GiRARD. formiug thc uppcr cdgc of the 



^1. nostrils, and widely separ- 



White River Canyon, Arizona. atcd, for the twO anterior 



Cat. No. 1019S, U.S.N.M. thiixls of thclr length, by the 



rostral. Prefrontals but slightly larger than the iuteruasals, like tlie 

 latter, subrouuded, longitudinally narrow, transversely elongated, and 



' Salvadora hairdii Jan, Iconografia degli Ofidi, pi. in, p. 52. Specimens in U. S. 

 National Museum from Orizaba, Vera Cruz, W. Tehuantepec, and Chihuahua, Sumi- 

 chrast and Potts; and in Museum Academy of Natural Sciences of Philadelphia, 

 from Jalapa, Vera Cruz, William Pease. 



-Salvadora 7nesicana Dumt^ril and Bibrou, Cope, Bull. U. S. Nat. Mus., No. 32, 1887, 

 p. 72. Zamenis mexicainis Dumi^ril and Bibrou, Erp. G(?n., VII, 1884, p. 695. Lyto- 

 rhynchua mexicaiius Coi^e, Proc. Amer. Phil. Soc, 1869, p. 266. The last maxillary 

 tooth is separated from the others, hence diacranterian. 



