22 MONOGRAPHS OF NORTH AMBRICAN RODENTIA. 
md aed 
copus, yet the singularly different: H. californicus (parasiticus of Cooper) also 
oceurs there; and that some of the samples of ‘‘gambeli” seem to tend a 
little toward californicus. Here appears to be the gateway, both in Hesperomys 
and in Neotome, that leads out from an ordinary type into a localized differen- 
tiation. We must confess that we suspect that certain intermediate Neotome 
and Hesperomys will yet be found in this region to show us the steps of depar- 
ture from N. floridanas into fuseipes and from H. leucopus into californicus. 
The skull of NV. fuscipes shows nothing diagnostic; a slight narrowness 
of the post-palatal notch being shared by the other western and Mexican 
forms. One example, No. 2040, measures 2.15 in length by 1.15 across the 
zy gomata. 
TABLE III.— Measurements of six specimens of NEOTOMA FUSCIPES. 
Nose to— 
2 =a 3 + 
5 Locality. Collector. = | Sues Remarks. 
2 at = 
E Slo | se es ee Wes |) Be 
5 al 3 =) ss os S = s 
a R R ° H a q i 
1158 | Santa Clara, Cal .....- eG COOPen a= -aae-| seas em enc 2.25 | 9.00 | 8.50 | 0.75 | 1.55 | 1.10 | Dry; adult; type. 
HED Rani Nios aeSescnoaaesses ROENG AEA SEs Brea oen| ease escian Iaceaiel esaaees 6.50 | 0.80 | 1.60 | 1.00 | Dry; young. 
TINE?) eS Gt) hoomeopeecopascss Coat eA Se aS eosoed Eecoee Haocae|Senci= 955040710) Peceee 1.02 | 1.05 | Dry; young. 
2679 | Petaluma, Cal ........ E. Samuels.-.......| 1.07 | 2.00 | 2.40 | 820 | 7.90 | 0.85 | 1.58 | 1.20 | Alcoholic; adult. 
PRD ogc) abameepceceaeson- noadki Wagoosssenssen 0.86 | 1.56 | 1.95 | 6.25 | 6.25 | 0.76 | 1.22 | 1.00 | Alcoholic; young. 
3655 | Fort Tejon, Cal ....... DRONES ce sécose posses) soses|soode 7.50 | 6.50 | 0.70 | 1.35 } 1.00 
| 
NEOTOMA FERRUGINEA, Tomes. 
Neotoma ferruginea, TOMES, Proc. Zoél. Soc. 1861, 281. (From Guatemala. Described as bright rufous, 
mixed with black hairs on the back, below pure white, the line of demarkation distinct. 
Length 6” 6”, head 1 9’”, fore foot 8’, hind foot 1” 2’, tail 6/’.)—Cours, Proc. Acad. 
Nat. Sci. Phila. 1874, 175. 
Dracnosis.—(No. 9507, Mus. Smiths., ex Tehuantepec.) —W. aureo-ferru- 
ginea, dorso obscuriore, infra nivea, auriculis subnudis, plantis fere nudis, caudd 
nigricante unicolore, truncum cum capite subequante, metatarsis supra ex albido 
Juscescentibus. Long. tot. 7.50 poll.; caude 6.50; pedis 1.40; auricule 0.90. 
Upper parts of a rich rusty-red, almost golden-rust, color along the.sides ; 
on the back obscured with considerable admixture of blackish hairs; the line 
of demarcation on the sides very sharp; the color of the upper parts (or a 
duskier hue) running down the outside of the legs to the wrists and ankles; 
the superior surfaces of the feet of most of the specimens white, clouded with 
dusky, sometimes the dusky strongly predominating, in other specimens, how- 
ever, hardly or not appreciable. Extremity of muzzle colored; but, on the 
sides of the lip, the white reaching up to the roots of the whiskers, while just 
behind this the ferrugineous dips abruptly downward, so that the outline 
of the white and ferrugineous is far from a straight line. Below snowy-white ; 
