APPENDIX. 361 



internal nares ; green ; in the typical form with a distinct narrow 

 yellowish line along sides of head and body, on outer edge of fore 

 limb and posterior edge of hind limb ; no bars on limbs ; under- 

 neath yellowish white. L. 45-60 mm. South. U. S. north to 

 D. C. (Lat., ashy.) 



Class of Reptiles. 



[The following additional species are given on the authority of Dr. 

 Stejneger.] 



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547 b. Thamnophis brachystomus (Cope). Lateral stripe on 

 2d and 3d scales ; tail i in length ; scales in 19 rows ; V. P. 132 ; 

 six upper labials, 8 lower ones ; color, below and upper lip light 

 olive, unspotted, above darker olive, with a brown band on each 

 side which extends from the fourth to the middle of the ninth row 

 inclusive, leaving a pale dorsal stripe of ground color one and two 

 half scales wide. L. 286 mm. One specimen from Venango Co., 

 Pa. (Gr., short-mouth.) 



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272 b. Tantilla (Baird and Girard). (Subfam. Scytalince) (name 

 unmeaning). Posterior maxillary tooth enlarged, grooved. Head 

 but slightly distinct ; pupil round ; no scale-pits ; no loral ; scales 

 smooth ; anal plate bifid. 



537 b. T. gracilis (Baird and Girard). 6 supralabials. Color 

 above pale brownish gray, head darker ; sides and lower surface 

 cream-color to dull scarlet; scale rows 15. V. P. 112-133. L. 

 195 mm. Mo. to Texas. 



Page 192. 



275 c. TROPIDOCLONIUM Cope. (T-po'jrtr, keel; Kkavlov, 

 twig.) 



This genus differs from Clonophis in the entire anal plate (bifid 

 in Clonophis'). 



541b. T. lineatum (Hallowell). Streaked Snake. Anal plate 

 entire; 17 to 19 scale rows ; color drab above with a light vertebral 

 line bordered on each side by a series of black spots and a similar 

 lateral stripe on 2d and 3d scale rows; underneath whitish with two 

 longitudinal series of black spots. Sixth upper labial does not reach 

 the commissure. V. P. 138-150. L. 300 mm. 111., la., Mo., to 

 Texas. 



Page 196 : 



564 b. Basoanion flagellum (Shaw). Coach-Whip Snake. 

 8 superior labials ; frontal plate very narrow behind, only half the 

 width of the supraocular. Adult more or less uniform ; pale be- 



