. The reptiles of western North America, an account of the species known to inhabit California and Oregon, Washington, Idaho, Utah, Nevada, Arizona, British Columbia, Sonora and Lower California. , Cat. Snakes Brit. Mus., Vol. Ill, 1896, p. 570 (part).Sistrurus catenatus censors Brown, Proc. Acad Nat. Sci. Phila., 1901, p. 99; Bailey, N. Amer. Fauna, No. 25, 1905, pp. 28, 49; Strecker, Baylor Bulletin, Vol. XVIII, No. 4, 1915, p. 43. Description.—Rather small. Head flat-topped, subellip-tical in outline when seen from above. Rostral moderatelylarge, bounded behind by internasal, anterior nasal
. The reptiles of western North America, an account of the species known to inhabit California and Oregon, Washington, Idaho, Utah, Nevada, Arizona, British Columbia, Sonora and Lower California. , Cat. Snakes Brit. Mus., Vol. Ill, 1896, p. 570 (part).Sistrurus catenatus censors Brown, Proc. Acad Nat. Sci. Phila., 1901, p. 99; Bailey, N. Amer. Fauna, No. 25, 1905, pp. 28, 49; Strecker, Baylor Bulletin, Vol. XVIII, No. 4, 1915, p. 43. Description.—Rather small. Head flat-topped, subellip-tical in outline when seen from above. Rostral moderatelylarge, bounded behind by internasal, anterior nasal and firstlabial plates. Plates on top of head are a pair of internasals,a pair of prefrontals, a frontal, supraocular of each side anda pair of parietals. Superior labials 11 or 12, separated fromeye by one or two scales. Scales on body in 23 or 25 rows,strongly keeled except in about two rows on each side. Analplate entire. Gastrosteges varying in number from 136 to153. Urosteges in a single series of from 24 to 31. The color above is yellowish brown, with three series Oc. Papers, Acad. Sti., \( X [ Van Pr,ATi: 1113 :-?? s. V ?-. / s, .•f •i. - A h- \ n t 1. ^iW^ :* ^% 1 ^ irt ^iii >*; »^ *• li(.. I. Crofj/zis g//\i, Ldwlt nf sliiii si>iiiiiirn fdllcrlcd .11 S:in .lev,- .1, i Cj lifurniil. Mexiio. Fi(.. 2. Crf/ltiliii tl^ra, Tiger StH-lion III .^kin nf .spi-cinu-n t-olli-cl rd ci^lilecn miles nnrlh (tf rinia <iniiil\-. .\rizniia. May. 11112. 47. SISTRURUS 907 of small chestnut-brown blotches along the sides and a rowof large brown dorsal blotches. A pair of elongate brownblotches extend from the supraoculars back onto the narrow chestnut-brown band extends down and back fromthe prefrontal plate to the eye and on to the neck, and isbordered below by a narrow yellowish stripe which extendsfrom the nostril to the angle of the mouth. The snout andupper jaw are
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Keywords: ., bookcentury1900, bookdecade1920, booksubject, booksubjectserpents
