RODENTIA—SCIURINAE—CYNOMYS GUNNISONII. 337 
the summer specimens exhibit no trace whatever of it. The arctomys lewisii of Audubon and 
Bachman come much nearer in point of color to the description of Lewis and Clark. It may 
be that there is a permanently reddish species on the Columbia, and, as I have already stated, 
I consider it by no means improbable that Captain Beckwith’s specimen may be specifically 
different from those of Lieutenant Bryan, which would make three in all. 
List of specimens. 
s Measurements. 
o 
a= = = = | 
= {8 s | ea ea 
ale = 7 x i= o elilsia 3 Elg 
E loos Locality. When col- | Whence obtained. = o S 2 = | & bis |s Collected by— 
Ss |eS! = lected. =] a = aisle! 3 St let | 3 
& fsx] 5 Ey ° = o}5 | = Qe) =| s 
2 |e"\e a oa oo) Sele [as | pens leis 
aia |z a a Se hl eal cl es | ees [sc pest ee | 
2/3 F = £ = = ai) Si Sal eS See! Seah cn 
eis bs Sl 2 8/2 lalgi2] 2 |ele/sls 
i) = | = So 
ols |a 6 z z2\)2 |6lele| = |S/Slala 
= ee ees | —_ / = 
501/1636)....| Cooachetope Pass,|.,............| Capt. E.G, Beck-| 22) Skin....... ing, 11,00)1.25)1.92)1.75) 1.84| .50) .33)....)....| Mr. Kreuz- 
Rocky Mts. with. feldt. 
1903 2601 ref Pole Creek, Neb.| July 30, 1856 | Lt. F. T. Bryan..| 178)..do....... [tees 10.501.85)2.30)....| 2.00 |....|.....2.24)1.56] W.S. Wood. 
1973...., O | Medicine Bow | Aug. 28, 1856 |......do.........| 312) Skin in ale? 3.50) 13.50)1.75)2.50)1.55) 2.20 | .52) .35)....|.... 
Creek, Neb. 
1 Probably too short. © Skin stretched, 
