672 MONOGRAPHS OF NORTH AMERICAN RODENTIA. 
9. Middle of the dorsal region dusky or black; rest of dorsal surface varied with dusky and 
yellowish-rnfous ; beneath dark reddish-brown, varying to fiery-orange; length about 
9.50 inches; tail full and bushy, rather longer than head and body. Hab.—Southern 
portion of Central America and the northern portion of South America...S. GERRARDI. 
10. Size rather small; length about 8.00 to 9.00 inches; above dark olivaceous-brown, minutely 
varied with yellowish or rufous; beneath fulvous or rufous; tail rather narrow, occa- 
sionally decidedly cylindrical toward the end. Hab.—Brazil, Northern South America, 
and Central America. Runs into two well-marked subspecies .... -....-.. .S. ASTUANS. 
a. Length about 8.00 inches; tail edged with pale yellowish; smaller and less rufous than 
the next. Had.—Brazil and Guiana..--....--.----. -.-.---. -0-2 22. =e var. wstuans. 
b. Length about 9.00 inches; tail edged with red, varying in tint from light yellowish- 
red to dark cherry-red; general color above rather more rufous than in var. 
estuans; also rather redder below. Hab.—Northern South America and Central 
» TANG OR So teno ponoas sasse9 sacs Aas8t faso05 So05S6 goeted oseesueesseesses var. rufoniger, 
Ill. Tail-vertebre alone equal to the length of the head and body; tail with the hairs one-seventh to 
one-fourth longer ; size large; premolars }: 
A. Tail full, bushy : 
11. Above dark pure-gray; beneath white; tail black, washed with white. Hab.—Pacific 
coast from the Columbia River southward to San Diego, Lower California; not east of 
thei Coastiian ges seo mee seelee ase nee eie seem ie cree eteeie a= ele) eee eh OSSO rs 
12. Above clear gray, except the middle of the dorsal region, where the color is mixed yellowish- 
brown and black; beneath generally white, varying at some localities to yellowish- 
fulvous ormnfous., ab:i—Mexicoic-eesetnsces\eselas= eisai a= sae engccce S. COLLLAL, 
13. Above black, varied with ochre-yellow and rufous; beneath white, fulvous- or brownish- 
ted; tail black at base and centrally below, edged broadly with red or yellowish-red, 
appearing mainly of this color at the surface ; pelage short and sparse, especially below. 
Hab.—Western Brazil, and thence westward to the eastern base of the Andes, and from 
Bo.ivia northward to New Grenada.< - =. - 2 2-6 s2-0 cocnns eee enn arcsec S. VARIABILIS. 
B. Tail natrow ; pelage coarse and rigid: 
14, Color variable, running into both albinistic and melanistic phases; generally more or less 
black above, varied with fulvous and red beneath. Hab.—Southern Mexico and Central 
PSC YB ope Moeeco NSSCCo as need Scan eaedede CHOnsE GsacSo coeds case 8. HYPOPYRRHUS, 
I.—Species inhabiting North America north of Mexico. 
SCIURUS HUDSONIUS Pallas. 
Chickaree. 
Var. HUDSONIUS. 
Eastern Chickaree, 
Sciurus vulgaris ForsTER, Phil. Trans 1xii, 1772, 378. 
Sciurus vulgaris, e, hudsonicus ERXLEBEN, Syst. Anim. 1777, 416. 
Sciurus hudsonius Parias, Nov. Spec. Glir. 1778, 376.—GMELIN, Syst. Nat. i, 1788, 147.—ScHREBER, 
Siiugeth. iv, 1792, 777, pl. cexiv.SuHaw, Gen. ZoOl. ii, 1801, 140.—KuHL, Beitriige zur Zool. 
1820, 66.—DrsMarEst, Mammal. ii, 1822, 340.—Saprnx, Franklin’s Narr. 1823, 663.—Har- 
LAN, Faun. Amer. 1825, 185.—Gopman, Am. Nat. Hist. ii, 1826, 138.—RicHaRDsoN, Fauna 
Boreali-Amer. i, 1829, 187, pl. xvii—Fiscuer, Synop. Mam. 1829, 349.—Gapper, Zodl. Jour. 
v, 1830, 205.—“ F. Cuvier, Suppl. Buff. Hist. Nat. i, Mam. 1831, 303.”—BacHMan, Proce. Zodl. 
Soc. Lond. vi, 1838, 100; Charlesworth’s Mag. N. H. iii, 1839, 383—THompson, Nat. Hist. 
Vermont, 1842, 46; App. 1853, 14 (albino).—DrKay, New York Zv0l. i, 1842, 61, pl. xvii, fig. 2.— 
WAGNER, Suppl. Schreber’s Siiuget. iii, 1843, 178.—Scninz, Synop. Mam. ii, 1845, 12 —Av- 
DUBON & BacuMaN, Quad. N. Am. i, 1849, 125, pl. xiv—Woopuousg, Sitgreaves’s Exp]. Col- 
orado and Zuni Rivers, 1853, 53 (Indian Territory)—KeEnnicorTt, Pat. Off. Rep., Agr., 1856, 
(1857), 67, pl. vii—Bairp, Mam. N. Am. 1857, 260, pl. xlvi, fig. 1—THomas, Trans. Ill. State 
