SCIURID^E. CLXXXVII. 325 



553. ARCTOMYS Schreber. (MARMOTS.) (apieros, bear ; /ivr, 



mouse.) 



1063. A. moiiax (L.). WOODCHUCK. GROUND HOG. Grizzly 

 gray, varying to chestnut and blackish. L. 18. T. 5. Hudson's 

 Bay to Va., W. to Neb. ; common, burrowing in the ground. 

 (Lat., solitary.) Subspec. canadensis (Erxleben). A small dark 

 race with short ears and tail, from Quebec and Western Ontario, N. 



554.1 SPERMOFHILTJS Cuvier. (<nrcpp.a, seed; <p[\os, loving.) 



a. Skull very long and narrow, the snout broad and very long; tail long ; ear 

 small. (Ictidomys Allen.) 



1064. S. franklini (Sabine). GRAY GOPHER. SCRUB GOPHER. 

 Yellowish brown, mottled with wavy lines of black. Tail long. 

 L. 15. T. 5s. F. 2. Prairies ; K 111. and N. W., introduced in 

 New Jersey. (To Sir John Franklin.) 



1065. S. richardsoni (Sabine). Grayish buffy with black hairs 

 and no distinct markings. Tail short. L. 12^. T. 3|. F. 2. 

 Dak. and N. VV. (To Sir John Richardson.) 



1066. S. tridecemlineatus (Mitchill). STRIPED GOPHER. 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. 10^. T. 3. Prairies; Tex. to 

 Mich, and N. W., common. (Lat., 13-lined.) 



555. EUTAMIAS Trouessart. (*, well, good; lamias.) 



1067. E. quadrivittatus (Say). MOUNTAIN CHIPMUNK. Back 

 with 5 black stripes and 4 whitish ones; rump grayish. L. 8. 

 T. 4. The eastern form, subsp. neglectus (Allen), occurs in the 

 forests about Lake Superior. The color duller and heavier, with 

 sharper stripes than in the true quadrivittatus, which is found in 

 Colorado and Wyoming. 



556. TAMIAS Illiger. (ra^ias, steward.) 



1068. T. striatus (L.). CHIPMUNK. GROUND SQUIRREL. Red- 

 dish brown ; back with 5 black stripes and 2 whitish ones ; rump 

 reddish. L. 11. T. 4. N. Y. to Va. and S., abundant. (Lat., 

 striped.) Subspec. lysteri (Richardson) is larger than T. striatus, 

 which it replaces to the northeast. Coloration pale. Lake Huron 

 to Maine and Hudson's Bay, S. to Penn. Subspec. griseus Mearns 

 is larger and stouter than the common chipmunk, the reddish tints 

 less marked. L. 11. Wis., and western Ontario, "W. (Lat., gray.) 



1 Allied to this genus is the Prairie Dog, Cynomys ludovicianus (Ord) of the Rocky 

 Mountain region. 



