OPHIDIA COLUBRIDAE RFIINOCUJLUS LECONTII. 623 



Rather more slender than H. ochrorhynchits ; scales more elongate, and 

 rows more oblique ; vertical plate rather broader, and head relatively nar- 

 rower. Color greenish-ash, darker than in H. ochrorhynchus ; the dorsal 

 spots black instead of brown, smaller 2 scales apart, 1 scale long, 58 to 66 

 in number on the body, occupying only the space from the ninth to the 

 thirteenth dorsal row, frequently dividing and alternating; two rows of smaller 

 alternating spots on the sides, one on sixth and seventh rows, the other on the 

 fourth row ; crown and muzzle thickly dotted with black ; beneath pale 

 olivaceous ; distribution of colors on the head and neck much as in H. 

 ochrorhynchus, but the neck spots rather larger, the brown replaced by black, 

 the ochraceous by olevaceous. Gastrosteges, 167 ; urosteges, 55. Length, 

 15 inches ; tail, 2^. 



65. Diadophis regalis, Bd. & Gir. 



Diadophis regalis, BD. & GlR., Cat, N. A. Kept., 1853, 115, 161 (Sonora). BD., U. S. & 

 Mex. Bound. Surv., ii, pt. ii, 1859, 22. COPE, Proc. Acad. Nat. Sci. Phila., 

 1866,310. COPE, Check-List, 1875, 38. 



From the Sonoran border ; not met with by me. According to its 

 describers, this species lacks an occipital ring; dorsal scales 17 rows; body 

 above uniform greenish-ash ; below light-yellow, with numerous small black 

 spots. 

 ? Diadophis docilis, Bd. & Gir. 



Diadophis docilis, BD. & GIR., Cat, N. A. Kept., 1853, 114 (Devil's River, Texas). 

 BD., U. S. & Mex. Bound. Surv., ii, pt. ii, 1859, 22, pi. 21, f. 3 (Tucson, &c.). 



Not seen by me. It is described as uniform ashy-gray above, yellowish- 

 white spotted with black below, with a broad yellowish-white occipital 

 ring, bordered with a narrow black line ; the dorsal scales in 15 rows. 



66. Rhinochilus lecontii, Bd. & Gir. 



Rhinocheilus lecontei, BD. & GlR., Cat. N. A. Kept., 1853, 120, 161 (type of the genus), 



(San Die'go, Cal.). 

 Rhinochilus lecontii, BD., U. S. & Mex. Bound. Surv., ii, pt. ii, 1859, Reptiles, 21, pi. 



20 (San Pedro, Tex.). 

 Rhinochilus lec.ontei, COPE, Proc. Acad. Nat. Sci. Phila., 1866, 304 (variety). COPE, 



Check-List, 1875, 36. 



My specimens from Arizona, without indication of particular locality, 

 represent, according to Professor Cope, a variety, having fewer (twenty) 

 black half-rings on the body, extending to the gastrosteges and separated 



