640 THE AMERICAN NATURALIST.. [Vow. XXXIIL 
SUBGENUS PARASCIURUS TROUESS. 
os 
Sciurus niger Linn. Southern fox squirrel. Virginia to southern 
Florida, east of the Alleghanies, and along the Gulf coast to 
eastern Louisiana. 
Sciurus ludovicianus Custis. Western fox squirrel. Mississippi Val- 
ley, from Louisiana to Michigan, and from the western edge of the 
Alleghanies to the eastern border of the Plains. 
. Sciurus ludovicianus vicinus Bangs. Northern fox squirrel. Moun- 
tains of West Virginia northward into western Pennsylvania. For- 
merly from northern Virginia north to southern New York and southern 
New England; now extirpated, except at the localities above indi- 
cated. 
Sciurus ludovicianus limitis (Baird). Texas fox squirrel. Texas, 
south into northeastern Mexico. 
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2 
SUBGENUS ARÆOSCIURUS NELSON. 
n 
Sciurus apache Allen. Apache squirrel. Chiricahua Mountains, Ari- 
zona, south into Mexico in the Sierra Madre to Durango. 
Sciurus arizonensis Coues. Arizona squirrel. Mountains of central 
Arizona, 
. Sciurus arizonensis huachuca Allen. Huachuca squirrel. Huachuca 
Mountains, southern Arizona, south into Sonora. 
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SUBGENUS TAMIASCIURUS TROUESS. 
Se 
Sciurus hudsonicus (Erxl.) Northern chickaree. Canada, north of 
Ontario and Quebec, east of the Rocky Mountains, and Alaska. 
- Sciurus hudsonicus gymnicus Bangs. Northern New England, north- 
ern New York, and southern Canada, including New Brunswick, 
Nova Scotia, Quebec, and Ontario. 
8b. Sciurus hudsonicus loguax Bangs. Southern chickaree. From south- 
ern New England, southern New York, and the vicinity of the Great 
Lakes, south to Virginia, and in the Alleghanies to North Carolina. 
8c. Sciurus hudsonicus minnesota, subsp. nov.! Minnesota chickaree. 
oOo 
[S] 
1 In my revision of the chickarees (loc. cit.) I called special attention to the 
small size of the chickarees examined from New Hampshire, no 
the chickarees of eastern North America. _They also differ a little in color when 
series of the two forms are compared, the small Eastern one being somewhat 
darker than thé large Western one. As, however, they grade so insensibly into 
the Southern (S. 4. oguax) and Northern (true S. hudsonicus) chickarees, respec- 
tively, it then seemed to me not worth while to recognize in nomenclature forms 
so hard to define, either in physical characteristics or geographically. Now that 
