54 MONOGRAPHS OF NORTH AMERICAN RODENTIA. 
Tape IX.—Mcasurements of seventy-five skulls of HEsPEROMYS LEUCOPUS and ils varieties, and of the other 
- specics that are subgenerically afined therewith, 
i i= = 
| ; z 
2 ee) jot 
is | 2] 8 
lise tatl ete | 3 
Locality. | 9 Sal ss Specimen and remarks. 
ies a ie 3 eal es 
| zs Sp = | 2 s S 
5 S| ets | Selle ane 
a 4 eo N = | = 
| | 
Middleborough, Mass. .-----) 1,01 | 0.38 0,51 , 0.16 , 0.64 | Typical of leucopus. 
yousee GW pseeees coc esence 4) LOND a O56) | Oster OED |jeso---dk 
Bacio do Se eeee oases Os SOumOe sen NOrag nl OM ban OOK ema ClO 
leeemen WO) scee Se bes Shem5ac555 1.00 | 0.37 | 0.50 | 0.18 ORGIES pase do 
SeEee Ol see eee eee eaee et OO HONS 72 Ol4AS OMe MONGa net sonic o 
eee do ac --s-=| 0.94-| 0.38 |0:47- | (0. 18: | 0560) |... -2=do. 
SA OMe evo nee eeteee 1.02 | 0.39 |-0,52 | 0,20'| 0.66 |..---:do 
lesen GO) cS cee tha eee, 1-04) (00240) 0) fd) 0051 0863)| ace do. 
fetes Os eect ay ae eas fle Oza CORSO Ba) O57, |/NO4GS) |eae=sadlo; 
Baie do 20. Sar se tne weet) LOS! [KON SB COST NORIS) (MONG3iEeee= Co 
2eneee WO) eeancmece ee eeseeee els [POLS 7a MOS 52u (Onl S SatQsGanl saea oO, 
Ge \lsaemoe do as ae 1.05 | 0.39 | 0.51 | 0.18 | 0.69 |.-.... do 
yao |. dopesscs Bes As ee | 1,02 | 0.37 | 0.52 | 0.19 | 0.64 |...... do 
inne |osooee do .. es 1.04 0537s) 0) 50 nOselizell ON G7 eee do 
Caan BBORee do - aSeeeees 0.96 | 0.37 | 0.50 | 0.18 OF615 | Ssee== do 
fie Recasee CO eect erica eos e 0,94 | ee MOnalig | OF 60h eeeeee do 
acacia (WM eeea a csnoecpescesae| Mes eacess| Ob OTe | OG Ieansecedl® 
Carlisle; Pa e- 2-2-2 2-222. || 105 || ONS7- 208545) (0B TONG re a saeee do 
ReNnSYlV ANA sae ona eS erator | 0.52 | 0.16 | 0.66 |.--..- do 
Saeed douse. Saqeeee sacs | e00 10551) Onis OSG49| eos eeado, 
Clarke County, Va.--.-.-...| 0.96 | 0.38 fe eal Cy at) 3G cae do 
SmOG oe OCHS asepbecaadcussacee MISES Ose (il bk @sry! | 0.19 O69 eeee=scas 
emaete GORE eaSroee a5 0.99 | 0.37 --| O816) ONG3i}<s--2.d0 
3h |....-. doz =a. Sa ONG u Osa zal = 2051 Ga n0G45 pene oO 
R009 ete asdonasl== Sees aa eeaces GOL9R" HONG \Os16q|K04G5))| sees do 
aa eee Gomes . O45 50! 157 (pO8sGH Genes do 
SOT [ees Gy eee ecm ae es pole alee | 0.46. | 0.16 | 0:58 |.--..- do 
BRR RA Ele 00 one en = Sec eae" | oacaee |e ces LOndon (One hORS 7a ee aeee do. 
1646 Saint Louis, Mo-...-.-..--.|' 0:98 | 0.38 |..-. | 0.181] 0:63:|.----. do. 
Lies | Port Ripley, Minn .......--| 1.06 | 0.40 | 0.55 | 0.19 ONG Gis eeeers do, 
Burlington, Vt...-.-...--..|------| 0.38 | 0.54 | 0.18 | 0.68 | Typical of “myoides”. 
ors oy. tS 2c cee -ee se eey- (ps OOK COL3T 1150550, | 0.17 | 0,62 |----..do 
Georgia .......... -.-.-.--| 1.00 | 0.40 | 0.£5 | 0.19 | 0.66 | Supposed gossypinus. 
oats Oras fees Sh etster cc oniseio| ON99 0. 42 | 0.52 | 0.18 | 0.66 |...--<do. 
Hillsborough, N. C...-.....) 1.00 |......)......| 0.17 | 0.62 | Representing “cognatus”. 
Washington, Miss........-.| 1.05 | 0.40 | 0.52 | 0.18 | 0.68 |...--. do. 
Seco Pett) Jee Saco cssacasecues|| HSU) | Wott oes Sc WSIS) ObGY le sere do. 
Washington Ter -......----| 1.05 | 0.38 | 0.54 , 0.17 | 0.68 | Typical of “boylii”. 
American River, Cal ...-.-.-| 1.09 | 0.40 | 0. 60 | 0.19 | 0.67 | Type of “ boylii”. 
$e0% | Fort Crook, Cal-.--.-....-2] 0.96 | 0.38 | 0.49 | 0.15 Bas Supposed to be “ gambeli”. 
“Tn the fractional numbers, the numerator is that ef skull itself, the denominator being that of the corresponding skin. 
|The ‘height’ is taken by laying the skull on a glass plate (when it rests upon the incisors and bull ossez), and measur- 
ing from the glass to the highest point, which 1s at the parietals, in a perpendicular that passes slightly in front of the bulla. 
} From tip of incisors to beck of condyle. 
