282 
U. S. P. R. R. EXP. AND SURVEYS—ZOOLOGY-GENERAL REPORT. 
Sciurus californicus, Lesson. Hab. California. 
Sciurus ( Macroxus ) californicus, Lesson, Desc. des Mamm. et d’Oiseaux, 1847, 143. 
“Size of the European squirrel. Ears not tufted. Tail flattened. A whitish ring around 
the eye. Hairs on the head above dotted with brown on a vinaceous ground. Cheeks and 
throat pale gray. Color above generally vinaceous gray, dotted with pale gray and black ; the 
ground color more gray on the nape and neck, more rufous on the rump ; vinaceous rose on the 
anterior and posterior limbs. The dotted gray of the back is cut by a straight white band 
which extends on each side from the upper part of the shoulder to the chute des reins , before the 
origin of the tail. Lower parts and flanks whitish. All the hairs of these parts are half black 
and terminated with white only. Tail above white and black, white on the edge; beneath, 
white bordered and terminated with black. Each hair is white at base and tip, black in the 
middle.” 
This description, in many respects, agrees with Spermophilus beecheyi, especially in the whitish 
stripe on the sides of the shoulders. If from Upper California, there is no other species to 
which it can be referred. 
Sciurus aureogaster, F. Cuv. Hab. Mexico. 
Sciurus aureogaster, “ F. Cuv. Mammif. Ill, livraison 59.” 
Wagner, Suppl. Schreb. Ill, 1843, 165. 
Geoff. Voy. de la Venus, Zool. 1855, 136; pi. x, xi. 
Sciurus leucogaster, F. Cuv. Suppl. Buffon, I, Mammif. 1831, 300. (Ecureuil de la Californie.) 
' Above, mixed white and black, or yellowish ; beneath, golden yellow. Length, 10 inches; 
tail, 8 inches. 
According to Geoflroy, this squirrel w as collected at Monterey, by the French frigate the 
Venus; none of our collections from this locality, however, give any indication of such a species. 
Sciurus pyladii, Lesson. Hab. Realejo, Mexico. 
Sciurus ( Macroxus ) pyladii, Lesson, Desc. Mamm. et Oiseaux, 1847, 142, 
Sciurus variegatus, Erxleben. Hab. Mexico. 
Sciurus variegatus, Erxleben, Syst. 1777, 421. 
Fischer, Synopsis, 1829, 352. 
Schinz, Syn. II, 1845, 17. 
Above, varied with black, rufous, and orange; beneath, rufous orange; occiput black. Snout 
and ears white. Length, one foot. 
Sciurus hypopyrriius, Wagler. Hab. Mexico. 
“ Sciurus hypopyrrhus, Wagler, Isis, 1831, 510.” 
“ Wagner, Miinchn. Gel. Anz. VII, 20,” 
Above, mixed black and dirty yellow; beneath, ferruginous ; ears and feet black; tail longer 
than the body, uniform in color with the back ; the hairs of only two colors. 
Length, 12 inches ; tail vertebras, 12^; tail with the hairs, 14 T 8 T . 
