636 12. BO1D& 



138. Lichanura trivirgata Cope 

 SAN LUCAN BOA 



Lichanura trivirgata COPE, Proc. Acad. Nat. Sci. Phila., 1861, p. 304 

 (type locality, Cape St. Lucas, Lower California); JAN, Iconogr. 

 Gen6r. Oph., 2e livr., 1865, pp. 69, 70; COPE, Bull. U. S. Nat. 

 Mus., No. i, 1875, pp. 43, 93; BOCOURT, Miss. Sci. au Mex., Rep- 

 tiles, 8e livr., 1882, p. 514; YARROW, Bull. U. S. Nat. Mus., No. 

 14, 1883, p. 142; BELDING, West Amer. Scientist, Vol. Ill, No. 

 04, p. 98; COPE, Bull. U. S. Nat. Mus., No. 32, 1887, p. 65; STEJ- 

 NEGER, Proc. U. S. Nat. Mus., 1889, p. 98, fig. 3; STEJNEGER, 

 Proc. U. S. Nat. Mus., 1891, pp. 512,514, 515; COPE, Proc. U. S.Nat. 

 Mus., 1891 (1892), p. 591; BOULENGER, Cat. Snakes Brit. Mus., 

 Vol. I, 1893, p. 129 (part); VAN DENBURGH, Proc. Cal. Acad. 

 Sci., Ser. 2, Vol. V, 1895, p. 137; VAN DENBURGH, Proc. Am. Philos. 

 Soc., Vol. XXXVII, No. 157, 1898, p. 141; COPE, Report U. S. 

 Nat. Mus., for 1898, 1900, p. 723; DITMARS, Reptile Book, 1907, 

 p. 211; STEJNEGER & BARBOUR, Check List N. Amer. Amph. 

 Rept., 1917, p. 73; VAN DENBURGH & SLEVIN, Proc. Cal. Acad. 

 Sci., Ser. 4, Vol. XI, 1921, p. 52; NELSON, Mem. Nat. Acad. Sci., Vol. 

 XVI, 1921, pp. 114, 115; WERNER, Archiv fur Naturgeschichte, 

 Vol. 87, 1921, Abt. A, Heft 7, p. 259 (part); TERRON, Mem. y 

 Rev. Soc. Cient. Antonio Alzate, Vol. 39, 1921, p. 164. 



Charina trivirgata GARMAN, Mem. Mus. Compr. Zool., Vol. VIII, No. 

 3, 1883, pp. 8, 131; GARMAN, Bull. Essex Inst., Vol. XVI, No. I, 

 p. 22. 



Description. Top of head nearly flat, covered with 

 small smooth scales. Snout long, high, broadly rounded, 

 with prominent, broad high, recurved rostral. Superior la- 

 bials 14 or 15, high anteriorly, but with tips sometimes cut 

 off and appearing as subloreals. Loreals usually two or 

 three. A series of scales encircle eye. Scales on body smooth, 

 in 40 or 41 rows, laterals a little larger. Gastrosteges nar- 

 row, varying in number from 240 to 241, at least. Anal 

 not divided. Urosteges in a single series of about 44. The 

 diameter of the eye is about one-third the distance from the 

 orbit to end snout. 



The color above is yellowish or brownish gray with 



