462 U. 8. P. R. R. EXP. AND SURVEYS—ZOOLOGY—GENERAL REPORT. 
at the same time by him are palpably wilful fabrications, either of his own or of some one 
imposing upon his credulity, the Musculus leucopus is sufficiently applicable to be retained. 
Judging from the color and the extreme shortness of tail, I am inclined to believe that Rich- 
ardson’s species is the Hesperomys sonoriensis, var. nebrascensis. 
The Mus noveboracensis of Selys is an excellent description of the present species. 
The Hesperomys maniculatus of Wagner is based on specimens from Labrador, which appear 
to be the same as those from Halifax. Should these not be the same with H. leucopus, from 
Middleboro’ and elsewhere, then the name will be retained ; otherwise it must be reduced to a 
synonym. His comparisons were made chiefly with Richardson’s description of what I consider 
to be a different species; and besides this, one strong point of distinction was supposed to be 
the hairy heels of the new species, those of H. leucopus being erroneously supposed by him to 
be naked. 
The American wandering mouse of Barton refers probably either to this species or to the 
H. myoides. The Mus leucopus of Thompson is a good description of H. myoides, his original 
specimen and type being now No. 833 of the Smithsonian collection. 
List of specimens. 
aed i “s ene ase ret a 
% Measurements. 
2 
z ne | 5 = g é — 
E ELMS : Locality. When col- | Whence and howob- | Nature of | | Bde | Setahieeell om es 21s is 
Bliss fo lected. tained. specimen. | S| 8 fsgiajoi/fl|els/2 1s 3 
2 /fe| § Soles Slee lsisisisre 
Swe Se 2iSilel|Fjeljel[sisislele 
B/E | x 218/8iglslslP| P| Fls|s 
S/S | a | Blelzlzilelelalalalels 
1373 Dr. J. B. Gilpin Bkinjereere|esvelasse| tees BAS ie 
2460 | vaccecdO ence cuce Be scl eee rai - solace 
F358 | accacc{rcvees +. John Downes. Mounted ..jocscheovefoossjccce| vosfacesleusstensc}sass{ouan 
QTAB | <cenes Hingham, Mass......-..+0+ T. M. Brewer........} In alcohol..| .53 -90]1.153.65]3.35/3.53 040}! 2) kel ene 
895 | 1944 Middleboro’ Mass. J. W. P. Jenks.. mali 1,25,3.50)3.33 3.60] ..0.feees 
893 | 1942 AoeuanlOuneewcsaeesss ++ {L.17:3.17]2.17)2.33}..0.feaea{l. 
go1 | 1940 <3] U08'2175|9195| se.) ceeufedeclesce Meal 
896 | 1945 .../1.08/3.00/2.50/2.60|... 
897 | 1946 ../1.08:3.252.50}2. 66]... 
753 | 1938 K Fh fcoc ae ident va «|lontchle tea awUCal tease CaRaAS tes eee ee ae lee a daa cota l occa eee teee | Meer sete ete eee 
75 | 1926 Deveecactecal meeal tere liens sikleee 
876 | 1927 callers |seealeece| saa 
894 | 1943 2.932, 49/2, 
878 | 1929 « oeac abt Oras HE 
TASC) cna] senses S bart .ee.| Mar. 29, 1856 3,50/3.25 
827 .| September...|.. '3,75|3.33 
1105 November 9., «oe (4,50/3.40}....4. 
1112 |.. veveloee |-secl4/9012.90]. 
2713 |.. .55| .95/1.16 3.55)2.83}....| . 
2714 |.. .50| .92/1.143.41]....}....] « 
Q715 .50) .90}L.143.13/3.25]....| . 
Q716 | .50| .9U/L.14 3,30|3,00}.... 
2717 |.. .50} .91]1.14.3.35)3.15}.... 
2720 |... 50) .90]1.143.30)3.10)....] .34 
2721 |.. 52} ,94]L.19 3.45)3.10)....] .40] .83}....)eeeel... 
2722 |.. 51] .95]1.15,3.30}3.16)....] .36] .80/....]. veJeoee 
2723 |.. .49| .86/1.12 3.00]3,00]....| .36] .78}eeeelesce|enes 
2724 |.. .49 se|1.112.95 2.78... £38], 79] #«0u|seuutanee 
2725 «| 50] .95]1.10'3,15/3,19]....] .38) .80}..../..../.. 
2726 .52} .94]1.153.50)3.21)....] 40] .78)... 
2727 .54|L.02]1.193,45)3.38)....|.06.] 85 
1 These measurements, as of all in the column, 895-827, were taken before skinning. The same specimen after being skinned measured to root of 
tail 4.30; tail, 3.00; hind foot, .82. 
