SACCOMYIDA—PEROGNATHIDIN4/—P. MONTICOLA. 511 
this is undoubtedly the effect of alcoholic discoloration, the parts being, no 
doubt, white in life. The tail is bicolor, to correspond with the body colors. 
While there is no question whatever of the distinctness of the subject 
of the present article from any others described in this paper, there are some 
points to be considered respecting its reference to P. monticola of Baird. The 
type of this species, now before me, has becn mounted and exposed to the 
light for about twenty years; it is faded and otherwise in poor state, the end 
of the tail and much of the fur being lost. -The color is now a uniform dull 
grayish-brown, much like the natural color of P. penicillatus, instead ot 
“mixed cinnamon and dusky”, as originally described; and the tail is uni- 
formly dingy white, instead of being ‘colored to correspond”; the hairs 
below are all white instead of “plumbeous at base”; and no lateral stripe is 
now appreciable, though an “indistinct” one was mentioned. But the main 
peculiarity of the species as to coloration, namely, the descent of the dark 
color down the fore leg to the wrist is still evident; and, in short, I find no 
color-differences not explicable upon consideration of the comparative state 
of the two specimens. We may therefore turn to the matter of size and pro- 
portions. Professor Baird says, ‘tail rather shorter than head and body,” 
giving the length of the former as 2.67-+, and of the latter as 3.00; whereas 
my animal is but 2.50 long, and has a tail of 3.20. But the decided discrep- 
ancies in these statements and measurements are readily reconciled upon the 
simple consideration that the tail is defective and the body overstuffed in the 
type of monticola. This brings about an agreement further borne out by the 
other measurements. In the following table, the first line of measurements 
is copied from Baird; the other is taken from the Fort Crook specimen, 
upon which this article is based, before skinning out of alcohol. 
TABLE II.—Measurements of two specimens of PEROGNATHUS MONTICOLA. 
a 
Tail to end = 
Fa From tip of nose to— ae Length of— z= 
r) ip 3 
E ees 3 e 
5 Locality. aa PRs as Py & 
3 < = Sie ircea lies 2 
Z Be fica Poste peepee Rahal Sean cg 
5 Perea eas, Septet | Stated ees ea 2 
° ajal/alo/teal/e/a]se |e] Z 
451 | St. Mary’s, Rocky Mountains ----| 0.46 | 0.92 | 1.08 | 3:00 |2 67+)].--...]...... | 0.80 | 0.25 | Mounted. 
(FI aio a OO Al a 9 | 0.55 } 0.85 | 1.00 | 2.50 |3. 20 3.50 | 0.30 | 0.80 | 0.20 | Alcoholic. 
i 
The principal discrepancy being explicable as above, there is nothing 
whatever in the foregoing table incompatible with specific identity. More- 
