SACCOMYIDyE— PEKOGNATUlDlNiE— p. MONTICOLA. 



509 



which e.nbraces Arizona and the contiguous part of California on ll>e oppo- 

 site side of the river. Specimens are rare ; there may be none whatever in 

 Eura|>e. Woodhoiise, LeConte, Bnird, and myself are possibly the only nat- 

 uralists who siieak of the species from autoptical examination. 



The relationships of some allied species being considered under other 

 heads, the only \wuit here arising for discussion relates to the ^' Cricelodipus 

 pa/vus" of LeConte, /. c. The specimen upon which that writer based his 

 remarks is now before me It is not adult, as supposed, but very young and 

 ungrowD, as shown by the unworn state of the teeth ; although Ihe tail is not 

 crested, there arc indications tiiat it would have become so ; the relative pro- 

 portions and colomtion are exactly as in P. penicillatus, to which I have little 

 hesitation in referring it. In any event, it is a true Perognathus, and not 

 Cricelodipuf at all, as shown beyond question by the obviously naked soles' 

 and distinctly recognizable lobe of the antitragus. 



PEROGNATHUS MONTICOLA, Baird. 



Konntain Fooket-monse. 



PcrayMfln utmllcoU, Baird, M. N. A. 1857, 423, pi. 51, figs. 3a-A (St. Mary's, Rocky Sloantains).— 

 Seen., P. R. R. Rep. xii, pt. ii, 1S60, 101 (notice of the same specimeD).— CouKfi, Proc. 

 Pbila. Acad. 1(475, 293 (described from another specimen from Fort Crook, Cal.). — TCoUES 

 & Tarrow, ZuuI. Exp], W. 100 Merid. 1H75, 110 (two si>ecimen8 donbtfnlly referred here). 



PmfMiku wUipilfM*, CoCES, Proc. Acad. N.kt. Sci. Phila. 1875, 29<t (provisional appellation). 



T Jtromf lonR,GtAX, P. Z. 8. 1468, 202. {Telle Ahtoii,epi»l.) 



• Duoxosis (No. 7251, Mus. Smiths. Inst., ?, Fort Crook, Cal, J. 

 Feilner). — Size of Mm musculus. Tail, including hairs, an inch longer than 

 the head and body, the vertebrae alone over half an inch longer. Hind foot 

 nearly one-third as long as head and body ; naked strip on sole very narrow 

 jxwteriorly; antitragus with a great, flat, rounded, upright lob6, but no lobe 

 of tragus opposite, the notch being defined in front by the outer edge of the 

 ear itself. Tail not penicillate nor crested; rather thinly but nearly uniformly 

 haired throughout. Pelage very soft and smooth for this genus — much as in 

 Cricetodipus. Color of upper parts descending on the fore leg to the wrist 

 A fulvous lateral stripe, indistinct but evident; hairs of under parts pure 

 white to the roots ; tail bicolor. Above, yellowish-cinnamon lined with black- 

 ish, the latter predominating ; below, white. 



DafENSioNS. — Lei h, 2 50; tail-vertebrae, 3.20; hind foot, 0.80. 



Habitat. — St. Mary's Mission, west.of Ricky Mountains, to Otter Creek, 

 Utah, and Fort Crook, California. 



^ism: 



kiMk 



