SCIURIDA. — CLXXXVII. a20 
550. ARCTOMYS Schreber. Marmors. (dipxros, bear; pis, 
mouse. ) 
1053. A. monax (L.). Woopcsauck. Grounp Hoe. Grizzly 
gray, varying to chestnut and blackish. L.18. T.5. Hudson’s 
Bay to Va., W. to Neb.; common. (Lat., solitary.) 
551. CYNOMYS Rafinesque. (kidwv, dog; pis, mouse.) 
1054. C.ludovicianus (Ord). Missouri Prarrie Doc. Red- 
dish brown, varied with darker and gray; tawny below. L. 16}. 
T. 34. Kas. to Montana, E. of Rocky Mts., living in large colonies. 
(Lat., of Louisiana. ) 
552. SPERMOPHILUS Cuvier. (omépua, seed; didos, loving.) 
a. Skull very long and narrow, the snout broad and very long; tail long; ear 
small. (Jctidomys Allen). 
1055. S. franklini (Sabine). Gray GorpHeR. Yellowish brown, 
mottled with black. L. 15. T.5}. Prairies; N. Ill. and N. W. 
(To Sir John Franklin.) 
1056. S tridecemlineatus (Mitchill). Strrpep GoruEerR. Dark 
brown, mixed with reddish, with 6 to 8 light stripes alternating with 
lines of dots, about 13 streaks in all; yellowish below, with a broad 
black stripe on each side. L. 104. T. 34. Prairies; Ark. to Ill. 
and N. W., common. (Lat., 13-lined.) 
553. TAMIAS lIlliger. (rapias, a steward.) 
a. Premolars }. 
1057. T. striatus(L.). CurpmunkK. GrouND SQuIRREL. Red- 
dish brown; back with 5 black stripes and 2 whitish ones; rump 
reddish. L. 11. T. 44. Maine to Va. and W., abundant; the 
Southern form is var. lysteri (Pallas). 
aa. Premolars 2. 
1058. T. asiaticus (Gmelin). Missourr Curpmunk. Back with 
5 black stripes and 4 whitish ones; rump grayish. L.8. T. 4. 
Wis. (Hoy.), N. W. to Asia. The E. form, var. quadrivittatus Say, 
has the sides bright rusty, the stripes on back well-defined. (Hu.) 
554. SCIURUS Linneus. (ckiovpos, squirrel; oxida, shade; 
ovpd, tail.) 
1059. S. hudsonicus Erxleben. Rep SQUIRREL. CHICKAREE. 
Yellowish gray, back with a median wash of bright rusty red; tail 
short and narrow, with a subterminal band of black. L.14. ‘T. 64. 
N. Am., S. to Penn. and N. Ind.; abundant N. 
1060. S. carolinensis Gmelin. Gray SqurrREL. BLAck 
SquirREL. Whitish gray, usually varied with tawny; middle of 
back brownish; ears not tufted; often entirely jet black. L. 20. 
T. 9. N. Am., E. of the plains, abundant. The common Northern 
