Merrhtrn — Xcn- Species <>f ThoixomyH. ] 1 1 



sides of moulh dusky; cdiiii while; uiiderparts salmnn. Nasals l:)roader 

 posteriorl.s ibaii in iitireiis. 



Mfdxitroiuiitx. — TyiiP specimpii ( $ ad.): total length 244: tail verlebrit- 

 76: hind foot HI. Average of .1 males from type locality: total length 

 24."): tail vertebne 73; hind fool '.Vi. 



Thomomys aureus perpes suijsj). nov. 



I'ypr from Lone Pine, Owens Valley, California. No. M'liji' c? ad.. 

 TI. S. National Museum, biological Survey Collection. December 23, 

 ISUO. I«:. W. Nelson. Original No. 14."). 



C/Htnirftrx. — Size rather small: color /> ".If'// ;/''", i/. in summer becoming 

 more butty fidvous. 



Ciilor. — Upperparts butt> gray, darkest on head and nose, jjalesl and 

 with strongest butty suffusion on sides: underparts, feet, ami tail huffy 

 whitish. Summer specimens are more buft'y fulvous like intrciis. 



('r(nii((/ r/iarttrtirs. — Skull similar in general to the smaller specimens 

 of (tuniiK. but decidedly shorter and with much smaller bulhe. 



Mcaxuniitcntx. — Type specimen ( $ ad.): total length 21."); tail verte- 

 bra* ().">: hind foot 28. Average of 10 adults from lyix' locality: total 

 length 212: tail vertebne (it;; hind fool 28..). 



Thomomys angularis pascalis subsp. n(i\. 



Tj/pc from Fresno, San .Toatpiin Valley, California. No. ijff^o. S ad., 

 U. S. National Museum, liiological Survey Collection. May 4, 1892. 

 C. P. Streater. Original No. lOJU. 



Chavdcicvx. — Similar to (dupilnrix but smaller; upperparts less fulvous 

 (more buffy yellowish): underparts very much paler and often marbled 

 irregularly with patches of white: wrists and ankles usually while: 

 ears smaller and dusky; earpalch obsolete or nearly so. Skull smaller 

 and smoother: the tempoi'al ridges not uniting to form a sagittal crest: 

 interorl)ital const rid ion less marked; l)ulla' larger: angle of under jaw 

 smaller. 



McdxiirriiK titx. — Type specimen ( $ ad.): total length 2:!(): tail verte- 

 bra* 80: hind fool l!2. Average of 4 males from t^pe locality: total 

 length 212. .5; tail vertebne 71.); hind foot :i(i..). Average of 4 females 

 from type locality: total length liKj; tail vertebra* {>?>: hind foot 28. 



Thomomys fuscus fisheri subsp. nov. 



Ti/pc from iieckwilh. Sierra Valley, Plumas County, California. No. 

 1()1,2::>8, i ad., U. S. National Museum, IJiological Survey Collection. 

 August :{, liXH). Walter K. Fisher. Original No. 1547. 



('//((rnrterx. — Similar to fasciis but upperparts very much paler; gray- 

 ish brown instead of dull fulvous brown. 



Cranial characters, — Skull similar to that oi fuxcm but shorter; zygp- 



