612 MONOGRAPHS OF NOKTII AMERICAN RODENTIA. 



ANALYSIS OF SPECIES. 



\ Snpei i<>i- incisors bisulcate ; fore claws and pouches at :i maximum. 



a. Incisors almost exactly bisected by the main groove, the Hue- marginal groove 



distinct : tail and feet hairy burbarjub. 



b. Inoisors unequally divided by tbe main groove into larger inner and smaller outer 



portion, tbe fine marginal groove faint or obsolete; tail uud feet nearly 



naked (South Atlantic and Gulf States) tuza. 



B. Superior incisors nnisulcate; fore claws aud pouches moderate. 



a. Incisors exactly bisected by the groove; fur soft; tail and feet hairy. 



«'. Smaller; yellowish-brown, below whitish (United States) castancts. 



b'. Larger; ihtrk reddish-brown, below plumbeous (Mexico) mexicanub. 



b. Incisors unequally divided by the groove into a small inner aud largo outer 



portion ; pelage very hispid; tail and feet nearly nuked IIISPIDUS. 



GEOMYS BURSARIUS, (Shaw) Rich. 

 Common Pocket (iophcr. 



Mvs bursarius, SHAW, Linn. Trans, v, 1800, 227, fig. 8 ;• Gen. Zool. ii, 1801, ICO, pi. 138 (the plate clearly, 

 shows the grooved incisors ; the pouches are everted). — Mitchiix, Am. Journ. Sci. iv, 1822, 183 

 (relating to the pouches). 



Cricettis bursarius, 1 >ESM., "Nouv. Diet. d'Hist. Nat. xiv, , 177 ; EnBy. Meth. Suppl. pi. 10, f. 4" ; Mamm. 



ii, 1822, p. 312 {"bursareus").— F. Guv., "Diet, Sc. Nat. xx, , 257".— Desmool., "Diet. 



Class, viii, , :17".— Giurr., "Anim. Kingd. iii. 1827, 138, pi. — "; v, 1827, 230, uo. 012. 



Saceophorue bursarius, linn, Beitriige, 1820, Co. — Fiscn., Synop. 1827, 304. 



PteudosUma bursarius, Say, Long's Exp. K. Mts. i, 182:!, 406 ( •' bursaria ").— Harlan, Fn. Amer. 1825, 

 153.— LESS., Man. 1827, 259.— GODMAN, Am. Nat. Hist, ii, 1831, 90 ("bursarium").— DeKaY, 

 N. V. Fn. i. 1842, 92.— Aud. & Bach., Q. N. A. i, 1849, 332, pi. 44. 



G corny si bursarius, Rich., F. B. A. i, 1829, 203. 



G corny 8 bursarius, RICH., Sixth Ann. Rep. Brit. Assoc. Adv. Sci. for 1830, 1837, 150.— Woodh., Sitgr. Rep. 

 Zuiii and Col. R. 1853, 50 (Indian Territory).— Paiivin, Ann. Rep. Smiths. Inst, for 1854, 1855, 

 293 (habits).— Kenn., Trans. Illinois Agric. Soc. for 1853-54, 1855, 580.— Bd., M. N. A. 1857, 



372, pi. 22, f. 1 a-h, and pi. 50, f. 2 a-g.— Maxim., Arch. Naturg. 18G1, ; Verz. Reise 



N.-Arn. Siiug. 18G2, 147.— Gerr., Cat. Bones Br. Mas. 1862, 223.— Leidt, Proc. Acad. Nat. 

 Sci. Phila. 1SG7, 97 (skull from loess of Missouri).— Ames, Bull. Acad. Minnesota, i, 1874, 

 70. — COUES, Proc. Phila. Acad. 1875, 131 ; Powell's Rep. Colorado R. 1875, 221 (monographic). 



Ascomys bursarius, Eyd. & Gki;v„ Voy. Favorite, v, 1839, 23.— Scmxz, Syn. ii, 1845, 132.— GlEB., Odou- 

 tog. 53, pi. 23, f. 8. 



Geomys (Saccoplurrus) bursarius, Gieh., Siiug. 1855, 529. 



? Mus ludovicir.nus, Ord, "Guthrie's Geog. 2d Am. cd. ii, 1815, 292. (Not determinable.) " 



/ Diplostoma fusea, Raf., Am. Month. Mag. ii, 1817,44.— Desm., Maimn. ii, 1822, 315.— Less., Man 1827,261. 



:' Ihplosloma alba, Raf., Am. Month. Mag. ii, lb!7, 44 (albino).— Desm., Maimn. ii, 1822, 315.— Less., Man. 

 1827, 201. 



Saccopnorust albus, Fiscn , Synop. 1827, 305. 



tGeomy cinereus, Raf., Am. Month. Mag. ii, 1817, 15. 



Ifti toccatas, Mi rCH., N. V. Med. Rcpos. xxi (new ser. vol. vi), 1821, 249 (from Lake Superior. "The Go- 

 pher, or I'om In -il Uat of Ninth America, (Mus bursarius.)") 



Ascomys canadensis, \. U>h. Acad. Wiss. Berl. 1823, 13, fig.— Brants, Muizen, 1827, 24. — Waon. 



"Suppl. Schreb. iii, 1843, 383; Abb. K. Baier. Akad. Miinch. xxii, 1846, 327, fig. (skeleton) ". 



Geomys canadensis, Li:C. Proc. Acad. Nat. Sci. Phila. vi, 1852, 158. 



Geomys drnmmondii, Rich., Sixth Ann. Rep. Brit, Assoc, for 1830. 1. -37, 157 (Texas. A species with double- 

 groove. 1 incisors, apparently exactly equal to what was afterward called brcriceps by Baird). 



Ascomys dnnnniondii, Wagner, " Suppl. Schreber". 



Geomys oregonensis, Li ■:(.'.. Proc. Acad. Nat. Sci. Phila. vi, 1852, 160 (no probability that the assigned locality 

 is correct). 



Geomys breviceps, Bi>.. Proc. Acad. Nat, Sci. Phila. 1655, 334 ; M. N. A. 1857, 378, pi. 52, f. 2 a-g (Texas).— 

 Gerr., Cat. Bones Br. Mus. 1862,223. 



Canada Rat, Sit w\, II. cc. 



Canada Pouched Bat, Richardson, I. c— Aud. & Bach., I. c. 



