+3. TAN TILL A 



internasals, a pair of prefrontals, a frontal, the supraocular 

 of each side, and a pair of parietals. Posterior nasal in con- 

 tact with preocular. No loreal. One preocular. Two post- 

 oculars. Temporals elongate, 1 + 1 . Supralabials seven, the 

 last largest, the third and fourth reaching eye. Infralabials 

 seven or six, the first pair not, or but just meeting on the 

 midline. Anterior genials elongate, posterior much shorter. 

 Scales smooth, in fifteen rows. Anal divided. Gastrosteges 

 varying in number from 148 to 157. Urosteges in two 

 series of about 58. 



The general color above is pale brownish gray or hair 

 brown. The top and sides of the head are dark brownish 

 gray or slate, the labials being light in color. A whitish 

 transverse collar crosses the nape, involving the posterior 

 portion of the parietals and about two rows of scales on the 

 neck. It is about as wide as the length of two or three 

 scales, and is bordered behind by a dark band of brownish 

 gray about the width of one or one and a half scales, and 

 may be edged with dark brown anteriorly. The color below 

 is coral red, becoming grayish white in alcohol. 



Length to anus 144 225 264 



Length of tail 56+ 81 



Distribution. — This snake is known only from three 

 specimens from the Huachuca Mountains, Cochise County, 

 and one from Mowry, Patagonia Mountains, Santa Cruz 

 County, Arizona. 



Remarks. — Nothing is known regarding the habits of 

 this snake. The single specimen in the collection of the 

 California Academy of Sciences was removed from the 

 stomach of a Diadophis regalis caught in Ramsey Canyon 

 late in the afternoon of July 29, 1912. This snake may be 

 distinguished from the other members of the genus which 



