BANGS : LAND MAMMALS OF FLORIDA AND GEORGIA. 203 
General characters. Size and proportions of P. subgriseus 
typicus , much darker in color, with a decidedly darker dorsal 
stripe ; ears and upper surface of tail black or nearly black ; hairs of 
under parts strongly plumbeous at base. 
Color. Adult, upper parts, varying from hair brown to Prout’s 
brown with many blackish tipped hairs intermixed, thickening along 
middle of the back into an irregular darker dorsal stripe ; sometimes 
a slight wash of fawn color along the lower sides; a conspicuous 
black orbital ring; under parts white, the hairs plumbeous at base; 
tail sharply bicolored, black above, white below; feet and hands 
white; ears dark, often nearly black. 
Measurements. The type $ adult: total length, 125 ; tail verte¬ 
brae, 48 ; hind foot, 16 ; ear from notch, 13. Average of ten adult 
topotypes, $’s and 9’s : total length, 126 ; tail vertebrae, 46.5 ; hind 
foot, 16.5. 
General remarks. Mr. Brown collected a series of thirty-seven 
specimens of P. subgriseus arenarius on the open sand hills near 
Hursman’s Lake, where it was very common and lived in burrows 
made in the sand. He did not find the species at any of the other 
points in Georgia at which he collected, but it is probably generally 
distributed throughout the sand-hill region of northern Georgia and 
southern South Carolina. 
P. subgriseus arenarius is readily distinguished from P. sub¬ 
griseus typicus by its much darker, browner coloring. In P. aren¬ 
arius the upper half of the tail is black, while in P. subgriseus 
typicus the tail has a narrow line of dark gray along the upper 
surface. The ear also is nearly black, while in P. subgriseus typicus 
it is gray. 
P. subgriseus arenarius has much the appearance of a small, 
short-haired P. michigane7isis and very possibly meets the range of 
that species ; it also without doubt passes into P. subgriseus typicus , 
and future careful collecting between the now known ranges of 
these species will probably show a complete gradation. 
Mus musculus Linne. 
Introduced. The house mouse is common in the neighborhood 
of settlements and dwellings all over Georgia and Florida, south to 
Key West. 
