104 Mrrriani — Three Neiv JnmjtliH/ 3[lce {Zaj)iix). 



Zapiis pacificus sp. nov. 



Ti/pe from Prospect, Rogue River Vallej', Oregon. No. 80445, c? yg- ad. 

 U. S. Nat. MuH., Biological Survey Coll. Collected August 29, 1896, by 

 Edward A. Preble. Original No. 1454. 



General characters. — Size rather small ; dorsal area strongly suffused with 

 yellowish. 



Colfir. — Dorsal area not strongly defined, but so strongly saturated witli 

 yellow that the yellow predominates over the black ; sides buffy yellow, 

 moderately lined with black hairs ; inner side of legs only sliglitly dark- 

 ened; tail sharply bicolor : grayish above, white beneath ; fore and hind 

 feet soiled white. 



Cranial, characters. — Contrasted with Zapus montanns the skull of Z. 

 pacificus is smaller ; the rostrum and nasals shorter ; audital bullre smaller ; 

 basioccipital 6/'oac?er between bullpe ; interpterygoid fossa shorter ; upper 

 molar series more divaricating anteriorly. 



Measnrenients. — Type specimen: total length, 225; tail vertebrae, 141; 

 hind foot, 31. 



Remarks. — x\ slightly younger specimen obtained by Mr. Preble at the 

 type locality has the dorsal area even less distinct, the entire ujiper parts 

 being ochraceous yellow. A still younger specimen in my private collec- 

 tion (No. 3708) from Point Reyes, California, has the upper parts almost 

 uniform deep ochraceous yellow with only the faintest trace of the dorsal 

 area. 



Zapus trinotatus montanus subsp. nov. 



Tiipefvoxw Crater Lake, Oregon. No. 79863, ? ad., TJ. S. Nat. Mus., 

 Biological Survey Coll. Collected x\ugust 19, 1896, by Edward A. Preble. 

 Original No. 1388. 



General rliaracters. — Size rather large; similar to Z. tri)iotatus, but some- 

 what smaller and duller (sides less ' orange '), with shorter ears and feet, 

 and differing slightly in cranial characters. 



Co/o;-.— Dorsal area sharply defined, grizzled dusky and yellowish ; sides 

 ochraceous, conspicuously lined with black hairs; inner side of legs to 

 heel dusky; tail sharply bicolor: gray above, white beneath; fore and 

 hind feet soiled white. F^elly in young adults washed with yellow. 



Cranial characters. — Skull similar to that of Z. trinotatus, but somewhat 

 smaller ; palate narrower ; incisive foramina narrower posteriorly ; angu- 

 Jar process of mandible less strongly developed. 



JSIcasureineiits. — Type specimen: total length, 231; tail vertebrae, 137; 

 hind foot, 31. Average of eight from type locality: total length, 230; 

 tail vertebra?, 135.5; hind foot, 31. 



