+2. CHILOMENISCUS 



There is a small posterior nasal, sometimes merged with 

 the anterior. The loreal plate normally is absent, rarely 

 present. The scales are in 13 rows, smooth and with apical 

 pits. The anal plate is divided, and the urosteges are in two 

 series. The eye is small, with round pupil. Maxillary 

 teeth grooved, the last two larger. 



Our three snakes of this genus may be distinguished by 

 the following. 



Synopsis of Species 

 a.- — Back crossed by a series of dark bands or rings, 

 b. — Scales of white dorsal area without central dark spots. 



C. cinctus.— p. 869. 

 b'. — Scales of dorsal white interspaces each with a central 

 dark spot. 



C. punctatissimus. — p. 872. 

 a'. — No transverse dark bands or rings; brownish or yellow- 

 ish with brown dots on individual scales. 



C. stramineus. — p. 874. 



197. Chilomeniscus cinctus Cope 

 Banded Burrowing Snake 



Chilomeniscus ductus Cope, Proc. Acad. Nat. Sci. Phila., i86i, p. ,103 

 (type locality, Guaymas, Gulf of Calfomia, Mexico); Cope, 

 Bull. U. S. Nat. Mus., No. i, 1875, P- 3S; Yarrow, Bull. U. S. 

 Nat. Mus., No. 24, 1883, p. 86; Belding, West Amer. Scientist, 

 Vol. Ill, No. 24, p. 98; Cope Bull. U. S. Nat. Mus., No. 32, 1887, 

 p. 82; Cope Report U. S. Nat. Mus. for 1898, 1900, p. 952; Brown, 



Proc. Acad. Nat. Sci. Phila., 1901, p. 85; Ditmars, Reptile Book, 

 1907, p. 373; Van Denburgh & Slevin, Proc. Cal. .Acad. Sci. 

 Ser. 4, Vol. 3, 1913, p. 410; Grinnell & Camp, Univ. Cal. Publ. 

 ZooL, Vol. 17, No. 10, 1917, p. 182; Van Denburgh & Slevin, 

 Proc. Cal. Acad. Sci., Ser. 4, Vol. XI, 1921, pp. 52, 70. 

 Chilomeniscus ephippicus Cope, Proc. Acad. Nat. Sci. Phila., 1867, p. 

 85 (type locality, Owen's Valley, California); Coues, Surv. 

 W. looth Merid., Vol. V, 1875, P- 625, pi. XVIII, figs. 3, 3a; Cope, 

 Bull. U. S. Nat. Mus., No. i, 1875, p. 35; Yarrow, Bull. U. S. 



