BANGS : LAND MAMMALS OF FLORIDA AND GEORGIA. 201 
Mr. Chapman, when he described this pretty little mouse, said, 
“ Sitomys niveiventris and its representative interior race S. h. sub¬ 
griseus bear no closer relationship to any known member of the 
genus to which they belong.” In making this statement Mr. 
Chapman must have overlooked the little mouse of the central 
prairies of the IT. S., P. michiganensis , to which P. niveiventris 
and P. subgriseus , and their allies, bear the closest relationship, 
forming all together a compact group in the genus Peromyscus. 
Indeed the form P. michiganensis pallescens lately described by 
Dr. Allen (Bull. Amer. mus. nat. hist., 1896, p. 238) from San 
Antonio, Texas, is, judged by the description, very near P. sub¬ 
griseus. This group is distinguished by small size, short tail, and 
particularly by the broad short skull, very different from the skull of 
the leucopus group. P. niveiventris and P. phasma are large for 
members of the group, and their skulls are rather narrower than 
and slightly different from those of the other species. All the 
species are inhabitants of comparatively open country. 
Four adult topotypes of P. subgriseus , males and females, give 
the following average measurements: total length, 127.3; tail ver¬ 
tebrae, 46.6; hind foot, 16.3. 
I took, last March and April, a series of 13 P. subgriseus at 
Gainesville, Florida, the type locality of the species, and have a 
series from Citronelle, Florida, collected by F. L. Small. The last 
mentioned specimens are of interest because intermediate between 
true P. subgriseus and the form described below as P. subgriseus 
rhoadsi from Tampa Bay. 
Peromyscus subgriseus rhoadsi subsp. nov. 
Type from the head of Anclote River, Hillsboro County, Florida, 
£ adult No. 6,980, collection of E. A. and O. Bangs. Collected, 
May 23, 1895, by W. S. Dickinson. 
General characters. Size and proportions of P. subgriseus 
typicus , differing from that form in color, being much yellower 
above; having the hairs of under parts white to the base and tail 
unicolor, white, or grayish white. 
Color. Adult: upper parts, fawn color shading on cheeks, rump, 
and along lower sides towards orange-buff; a slight admixture 
along middle of back (in fresh pelage) of blackish tipped hairs, but 
no decided darker dorsal stripe. In several skins of old adults a 
