33. _PITUOPAIS 729 
mannii and P. catenifer catenifer. No sharp lines can be 
drawn between the subspecies, for one changes gradually 
into another. P. catenifer catenifer, with its fewer gastro- 
steges and many blotches, P. catenifer heermanni, with 
fewer gastrosteges and fewer spots, and P. catenifer deserti- 
cola with more gastrosteges and fewer spots, all intergrade. 
As yet, too few specimens from Idaho are at hand to 
enable one to state to which subspecies they should be re- 
ferred. They may perhaps belong here, but the few speci- 
mens I have seen seem more like the snakes of Utah than 
like those of Nevada. 
162 Pituophis catenifer stejnegeri Van Denburgh 
Urau GopHer SNAKE 
Plate 77 
Pityophis bellona Core, Ann. Rep. U. S. Geol. Surv. Terrs., 1871 (1872), 
p- 468. 
Pityophis sayi bellona, Cope, Bull. U. S. Nat. Mus., No. 1, 1875, p. 39 
(part); Yarrow, Surv. W. rooth Merid., Vol. V, 1875, p. 540 
(part); Yarrow, Bull. U. S. Nat. Mus., No. 24, 1883, p. 106 (part); 
Core, Report U. S. Nat. Mus., for 1898, 1900, p. 872 (part). 
Pityophis sayi sayi Yarrow, Bull. U. S. Nat. Mus., No. 24, 1883, p. 105 
(part). 
Pityophis catenifer bellona Brown, Proc. Acad. Nat. Sci. Phila., 1901, 
p- 54 (part). 
Pituophis catenifer deserticola Van DeNBuRGH & S tevin, Proc. Cal. 
Acad. Sci., Ser. 4, Vol. 5, No. 4, 1915, p. 107, pl. 14, fig. 5; Pack, 
Copeia, 1919, No. 68, p. 16. 
Pituophis catenifer annectens VaN DenBuRGH & Stevin, Proc. Cal. 
Acad. Sci., Ser. 4, Vol. 9, 1919, p. 216 (part). 
Pituophis catenifer stejnegeri Van DENBURGH, Proc. Cal. Acad. Sci., Ser. 
4, Vol. X, No. 1, 1920, p. 21, pl. 2, fig. 1 (type locality, Fort Doug- 
las, Salt Lake County, Utah); (?) Van Densurcu & Stevin, 
Proc. Cal. Acad. Sci., Ser. 4, Vol. XI, 1921, pp. 40, 45. 
Description—Head somewhat flat-topped, with snout 
projecting and rather narrow. Temporal regions not swol- 
