202 PROCEEDINGS : BOSTON SOCIETY NATURAL HISTORY. 
dull orange-buff is the predominating color of the upper parts. 
Under parts, pure white to base of hairs. Tail unicolor white, 
sparsely haired; feet and hands white; ears pale gray or yellowish 
(probably nearly flesh color in life). 
Measurements. The type $ adult: total length, 124.46; tail 
vertebrae, 45.72; hind foot, 16.51. Average of ten adults, $’s 
and 9’s, from region about Tarpon Springs, Florida: total length, 
126; tail vertebrae, 47 ; hind foot, 17. 
General remarks. I have named this form after Mr. Samuel N. 
Rhoads, its real discoverer, who, although seeing its distinctness, 
was obliged, in his “ Contributions to the mammalogy of Florida ” 
(Proc. Acad. nat. sci., Phila., 1894, p. 159), to refer it, on account of 
lack of material, to true P. subgriseus. 
In color P. subgriseus rhoadsi in a general way somewhat 
resembles P. niveiventris , but the likeness stops there. Mr. Chap¬ 
man supposed this form to represent an intergradation between 
P. subgriseus and P. niveiventris. This is of course not the case. 
P. rhoadsi is so widely separated geographically from P. niveiven¬ 
tris that intergradation is out of the question. Moreover, it is 
unreasonable to suppose that such very different species would 
intergrade even if they did come in contact. The skull is the broad 
short skull of true P. subgriseus. 
P. subgriseus rhoadsi is of the size and proportions of P. sub 
griseus typicus , but differs from that form very much in color, being 
yellowish or fawn color above, having a unicolored tail, and the 
hairs of the under parts being white to the base. P. subgriseus 
typicus is brownish gray above, has a bicolored tail, and the hairs 
of the under parts are gray at the base. 
P. subgriseus rhoadsi probably has an extensive range covering 
the southwestern part of the Florida peninsula, although I have 
seen specimens only from the neighborhood of Tampa Bay. It 
intergrades with P. subgriseus typicus in Citrus County, the 
specimens already referred to from Citronelle being perfect inter¬ 
grades between the two forms. 
Peromyscus subgriseus arenarius subsp. nov. 
Type from Hursman’s Lake (Savannah River), near Bascom, 
Scriven County, Georgia, $ adult No. 5,925, collection of E. A. 
and O. Bangs. Collected, December 15, 1896, by W. W. Brown, 
Jr. 
