Page:Natural History of the Ground Squirrels of California.djvu/12

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1. Size large: body alone more than 9 inches (228 mm.) long; tail more than 6 inches (152 mm.), not counting hairs; ears tall and rather pointed; tail bushy.
 * 2. A blackish brown wedge-shaped patch on middle of back between shoulders


 * 2'. No blackish patch on back.
 * 3. Tail longer: without hairs, about 8 inches (203 mm.); no sharply defined triangular whitish patch on each shoulder


 * 3'. Tail shorter: without hairs, 7½ inches (190 mm.) or less; a more or less sharply defined triangular whitish patch on each shoulder.
 * 4. Size larger: body alone more than 10¾ inches (273 mm.) long; general tone of coloration darker


 * 4'. Size smaller: body alone less than 10¾ inches (273 mm.); general tone of coloration lighter.
 * 5. Coloration pale in general tone, near light cinnamon-drab; shoulder patches clear silvery white and more extensive


 * 5'. Coloration somewhat darker, near wood brown; shoulder patches duller white and less extensive

1'. Size medium or small: body alone less than 9 inches (228 mm.); tail less than 6 inches (152 mm.), not bushy; ears low and rounded, or else reduced to mere rims.
 * 6. Body with conspicuous lengthwise stripes; coloration varied.
 * 7. One white stripe on each side of body; under side of tail conspicuously white; head not more or less yellowish or coppery.
 * 8. Smaller: body alone 6 inches (152 mm.) or less; general coloration grayish drab


 * 8'. Larger: body alone 6¼ inches (158 mm.) or more; general coloration light clay color.
 * 9. Size slightly greater; tone of color slightly darker, more deeply clay color


 * 9'. Size slightly less; tone of color slightly paler, more buffy


 * 7′. Three stripes on each side of body, one white and two black; head more or less yellowish or coppery.
 * 10. Tail longer: without hairs, about 3½ inches (89 mm.).
 * 11. Tone of coloration lighter; middle of back more of an ashy brown


 * 11'. Tone of coloration darker; middle of back more of a cinnamon-brown


 * 10'. Tail shorter: without hairs, about 3⅛ inches (79 mm.)


 * 6'. Body without any stripes: general coloration nearly or quite uniform.
 * 12. Size larger: body alone more than 7 inches (178 mm.).
 * 13. Larger: body about 8½ inches (216 mm.); middle of back not bright reddish-brown, but grayish-brown


 * 13'. Smaller: body about $7 4/5$ inches (198 mm.); middle of back bright reddish-brown


 * 12'. Size smaller: body alone less than 7 inches (178 mm.).
 * 14. Tail round and relatively long: over 3 inches (76 mm.).
 * 15. Tone of coloration paler, light pinkish-cinnamon


 * 15'. Tone of coloration darker, wood brown


 * 15". Tone of coloration medium, grayish-brown or avellaneous


 * 14'. Tail flat-haired and relatively short: under 3 inches (76 mm.).
 * 16. Under side of tail pinkish-buff; rim of ear distinct though low


 * 16'. Under side of tail white; rim of ear scarcely discernible above general surface of head

.—Figures indicating page numbers refer to folios at foot of pages.