1901.] NATURAL SCIENCES OF PHILADELPHIA. 6S 



usually another on the edge of the ventrals; most of the scales 

 on the rest of the dorsal region have dark centres; yellowish 

 beneath, without spots except sometimes on the throat; top of head 

 dark; an indistinct light line from the nostril to the eye; a light 

 spot on both pre- and post-oculars; labials yellow, a little spotted. 



I am unable to formulate a valid distinction between 7j. schotti 

 B. and G. and this species ; the stripes appear not to run as far 

 back, but they are variable in this respect in Z. t. keniatm, and 

 their disappearance on the tail is doubtless a result of the fading 

 out of color (or, more coi-rectly, the failure to develop it) poste- 

 riorly, which is common in the genus. No. 5,369 Academy coll. 

 (old number 1,973), labeled schotti, from the Rio Grande, appears 

 to be one of Schott's original specimens, and almost exactly cor- 

 responds to No. 5,363, a tieniatus from Utah, of about the same 

 date. But it must be admitted that no great reliance can be placed 

 upon color characters in specimens which have been for so man}- 

 years in spirits. 



Hab. — Arizona, Utah and southern California. 



SALVADORA B. and G. 



I. c, 104; Cope, I. c, 618, and Rep. Nat. Mus.. 817; Zamenis (part) 

 Boul., I. c, I, 379. 



Maxillary teeth smooth, increasing posteriorly, no interspace; 

 rostral widened laterally with projecting edges; one loreal; two 

 internasals; two nasals; two or three preoculars ; pupil round; 

 scales smooth with pits in 17 rows; anal divided; size medium; 

 body slender; head distinct. 



Hab. — Southwestern United States ; Mexico. 



This genus is like Zamenis, but has the rostral considerably 

 enlarged, Avith free, expanded lateral borders. 



Salvadora grahami B. and G. 



I. c, 104 ; Cope, I. c, 619, and Rep. Nat. Mus., 818 ; Zamenis (jra- 

 harni Boul., I c, I, 39:5 ; S. (irahami Van Den., I. c, 180 ; Phvmo- 

 thi/ra 7iexalei)is Cope, Proc. Acad. Phila., 18t)l, 300 ; S. (j. hexalepis 

 Stej., No. Amer. Fauna, No. 7, 203. 



Head plates normal; rostral entering between internasals; lower 

 preocular small, sometimes a third preocular ; post-oculars 2 or 3 ; 

 temporals 1 (2)-2 (3); upper labials 8; scales in 17 rows; ven- 

 trals 175-206; subcaudals 75-108. 



Length about 1,200 ram. (tail 300). 



A yellowish dorsal stripe about three scales wide, narrowing 



