96 MONOGRAPHS OF NORTH AMERICAN RODENTIA. 
of, there are no synonymical points to be determined in this case. There 
are, however, several discrepancies between the description of Audubon and 
Bachman and the characters of the animal which Hoy, Kennicott, Baird, and 
ourselves describe. Thus, they say, ‘‘mammee, six pectoral and four abdom- 
inal.” We fail to realize ‘cheeks yellow,” though, perhaps, they are a little 
brighter than surrounding parts. The dimensions given, 4 inches for length 
of head and body, are so much greater (by a full inch) that possibly the fig- 
ure “4” may be a typographical error; but then the tail, 25, is nearly as much 
in excess of what we find. It is barely possible, after all, that, as Professor 
Baird hints, none of our specimens are what Audubon and Bachman called 
michiganensis. In that event, and if positively distinct from Audubon’s and 
Bachman’s animal, they would, of course, bear the name of “bairdii”, and 
“michiganensis” Aud. & Bach. be relegated among the unnumbered synonyms 
of leucopus. But, in the seeming impossibility of determining this point, it is 
better to let michiganensis stand for what we now describe. 
TABLE XXVI.—Measurements of forty-seven (and list of other) specimens of HESPEROMYS MICHIGANENSIS. 
| 
Nose to— 
¥ ; els 
8 Date. Locality. Collector. | 2/s Remarks. 
Bins NS Sep teh PSS as 
UES el | eee, oer gee TMND IS eee eee eee J. LeConte....-- oes [peel ea] ere 0 her 0} = OGG leer nl) yrs 
782 hl pose Aaeaates Frémont, Ill ....-.. So Wadeshawee <a. cose] eeadisee sl oHO0 aon) ==-lOsGg! ee eaO. 
WEdi Eowiiscecescee stelllecmctdOre teases. Mace e edo) ee noe BSA best pose foo=: | 4| seul Pamaliseas | LONG E aire pes 
9951 | ¢ | Apr. 8, 1855} Marion County, Ill ... | R. Kennicott 3. 25]2. Ol} ....|0. 70)....] Dry; ‘Bairdii.” 
650 |..-.] Apr. 15,1855] West Northfield, Ill ...]... do ........-. paeh ancl eine | acies| POO) eee Osnee poe = Ey 
733 |...-| Sept. — 1855] ----. Ce eeceeeoe cose soma eceesecaae <a we|atewe|=mme|enidel LOC) = <2|0) 68) =— a2) a= Os 
MST) | ee) pre 25, 2ebo| hess Ota sas esos BARE Waar Bem pee See ced ee sn foe me) LD Craven te 
733 Q | May 13, 1855 ]..--.. doeee gee ce eae jae Ota saaeoe Baas] Meer seee| Pats ete] Peselhbl ome| Date 
739 |...) May 13, 1855\|---..- 0. Fas-cessenseee seeeOOit ane aceon S24 seal Hemel lose Seas Moss) aoc Beas ootloy 
977 |... | May —, 1855 ..|2. 7012. 10}... .|0. 70)..-.].-- do. 
| 1406 .| Mar. —, 1856 .-- 2. 90)2. OU}....10. 70}.-..}-.-.do. 
eset Pots | Fees ay 3 on oe 1, 00/2. 70} L. 76/0. 35}0. 68/0. 44 Alcoholic. 
| 2757 2 1. 45/3. 00) 1. 90)0. 30/0. 70)0. 48) - ... do. 
H 2758 foe 1. (0/2. 97}2. 00/0. 30/0. 68)0. 45}. . -.do. 
2759 1, 10/3. 20)2. 25'0. 35/0. 70/0. 48) .--.do. 
2760 et roca —darmsap ment nacect! OSSSRha Scam sce amet Yemen eae 1, 05/2, 95/2. 33)0. 32/0. 71/0. 48) --.do. 
| 2761 Styl Scemeserso rises Hossa tC ae een eal EEE oe ses an oe I 1. 05)2. 85}2. 20/0. 30/0. 68/0. 46 do. 
UPON ep | Se Sponsesece 0) eS-- ek =e 0. 50}0. 85/1. 05)3. 25] 2, 25]0. 35]0. 73}0. 50} . - . .do. 
2763 Oe Seer Secyie Se OO met aiscaee 0. 5219. 87} L. 05) 3, 45) 2. 55)0, 36)0. 70)0. 55)... .do. 
2164 | of PAO: =e ene. - (0. 45)0. 75]0. S6) 2. 90) 2. 0=}9, 30)0. 65/0. 50]... .do. 
2165 | of }--+---------- Sl Semel) catia. 0, 51/0. 87/1. 10)3, 20]2. 20/0. 35]0. 75/0. 48] -..do. 
Path Teall iol hes aee ss eee Be Nes PGi os ce 0. 450, 82/0. 98)2. 90}2. 08/0. 30/9. 65)0. 48). - ..do. 
2771 | Waren cae 4 ae SomGliy.-ossecens 0. 50/0. 85/1. 08).3. 33!12, 18/0. 32]0. 70/0. 50)... .do. 
7435 a hooennsnoseeess eee Os eee eee 0. 48]0. 78/1. 08)2. 80/1, 75] 9. 31)0. 69)0. 45}... do. 
O92 eae 56) jececo Secalecen OO oe sente cen 0. 48|0. 75) t. 00/5. 05}2. 00/0. 33/0. 70/0, 55) .. ..do. 
99289) sas | is secre esicla peiaie Se serlan| Some U0 Neier oer 0. 47/0. 79 BOSS Tah OS Oe 
* 9950: labeled “cognatus ”! 
