33. PITUOPHIS 715 
159. Pituophis catenifer heermanni (Hallowell) 
VaLLEY GOPHER-SNAKE 
Plate 75 
Pityophis Heermanni HatioweE.t, Proc. Acad. Nat. Sci. Phila., Vol. 
VI, 1853, p. 236 (type locality, Cosumnes River, California). 
Pityophis vertebralis HattowE.t, Rep. Pacific R. R. Surv., Vol. X, 
1853; Bet. IV; p. 14. 
? Pituophis Wilkesii Lorp, Naturalist Vancouver Island, Vol. II, 1866, 
p- 307 (part). 
Pityophis sayi bellona Yarrow, Bull. U. S. Nat. Mus., No. 24, 1883, 
p- 106 (part); Townsenp, Proc. U. S. Nat. Mus., Vol. ro, 1887, 
Pe 23902) 
? Pityophis catenifer Townsenp, Proc. U. S. Nat. Mus., Vol. 10, 1887, 
Pp. 239. 
Pituophis catenifer Van DensBurcH, Occas. Papers Cal. Acad. Sci., V, 
1897, p. 195 (part). 
Pityophis catenifer catenifer Brown, Proc. Acad. Nat. Sci. Phila., 1901, 
p- 53 (part). 
Pituophis catenifer catenifer GRINNELL & Camp, Univ. Cal. Publ. Zool. 
Vol. 17, No. 10, 1917, p. 193 (part); Van DensurcuH & SLeEvin, 
Proc. Cal. Acad. Sci., Ser. 4, Vol. IX, 1919, p. 211 (part); Dice, 
Univ. Cal. Publs. Zool., Vol. 16, No. 17, 1916, pp. 303, 307, 308, 
310. (2). 
Pituophis catenifer heermanni Van Densurcu, Proc. Cal. Acad. Sci., 
Ser. 4, Vol. X, No. 1, 1920, p. 16, pl. 1, fig. 2. 
Pituophis catenifer deserticola BuancHaRD, Copeia, 1921, No. 90, p. 5. 
Description —Head somewhat flat-topped, with snout 
projecting and rather narrow. Temporal regions not swol- 
len. Rostral plate very large, prominent, not very narrow, 
often recurved 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 prefrontals (normally four), a frontal, supraocu- 
lar of each side, and a pair of parietals. Anterior and post- 
erior nasals usually distinct. Loreal usually elongate. Pre- 
oculars usually two, occasionally one. Postoculars normally 
