Vol. X] 



VAN DENBURGH— VARIATION IN GOPHER-SNAKES 



21 



Pituophis catenifer stejnegeri, new subspecies 



Utah Gopher-Snake 



(Plate 2, fig. 1) 



Diagnosis. — Gastrosteges average more than 230; urosteges 

 average 60 to 66; scale-rows most frequently 29; preocular 

 most often single; supralabials usually^eight ; dorsal blotches 

 fewer, average on body 58, on tail 16.5; no distinct red in 

 coloration. 



Type. — Cal. Acad. Sci. No. 14203, adult male, collected by 

 Joseph C. Clemens, at Fort Douglas, Salt Lake County, Utah, 

 June to July 4, 1908. 



Description. — Head somewhat flat-topped, with snout pro- 

 jecting and rather narrow. Temporal regions not swollen. 

 Rostral plate very large, prominent, not very narrow, often re- 

 curved between internasals on top of snout ; bounded behind by 

 internasal, anterior nasal, and first labial plates. Plates on top 

 of head are a pair of internasals, a variable number of pre- 

 frontals (normally four), a frontal, supraocular of each side, 

 and a pair of parietals. Anterior and posterior nasals usually 

 distinct. Loreal usually elongate. Preoculars usually one, oc- 

 casionally two. Postoculars usually three, often two. Supra- 



