110 



ZOOLOGY. 



Germs PEROGNATHUS, Maxim. 



PEEOGNATHUS PENICILLATUS, Woodh. 



Taift-lailed Kangaroo Mouse. 



Ptrognathtts penicillatus, Woodh., Proc. Acad. Nat. Sci. Phila., 1852, 200; Sitg. Eep. 

 Expl. Zufii & Colorado E., 1S53, 49, pi. 3.— Aim. & Baoii., Q. N. A., iii, 

 1854, 298.— BAIBD, M. N. A., 1857, 418, pi. 20, f. 5.— CODES, Am. Nat, i, 

 1SG7, 397.— GKAY,P. Z. S., 1868, 201.— CoTJES, Proc. Acad. Phila., 1875,287 

 (monographic). 



Originally described from the region embraced in the present report, 

 of which it is a characteristic species. 



Other individuals of this genus, or of Cricetodipus, were secured as indi- 

 cated below, but have not as } T et been identified. 



Specimens. 



No. 



Name. 



Locality. 



Date. 



Collector. 



Remarks. 



^57 

 2 



? Perognathus (sp.). - 

 do 



Arizona 



New Mexico 



Sept., 1S73 

 June, 1S73 



Dr. O. Loew 



Dr. C, G. Newberry. 





! PEROGNATHUS MONTICOLA, Baird. 



Perognathus monticola, Baird, M. N. A., 1857,422, pi. 51, Qgs. 3 a-h.-~ Sucbx., P. E. E. 

 Pep., xii, pt. ii, 1800, 101.— Codes, Proc. Acad. Nat. Sci. Phila., 1875, 293. 



We refer to this species, with some doubt, two specimens collected by 

 Mr. Henshaw on Otter Creek, Utah. These are apparently young animals, 

 but, as they are not accompanied with the skulls, the point cannot be de- 

 termined. Owing to their taxidermal condition, the relative proportions of 

 body and tail cannot now be ascertained. The specimens are quite small ; 

 in a somewhat over-stuffed condition, they measure about 2 h inches, but were 

 probably little, if any, over 2 inches from nose to root of tail ; hind foot 

 < 1.81 ) ; and in fact they resemble, at first sight, a species of Cricetodipus rather 

 than of Perognathus. But the soles are naked, along a narrow strip, epiite 

 to the heel ; the antitragus has a prominent lobe ; and we determine, with- 

 out appreciable risk of error, that the ear has the peculiar structure of P. 

 ■monticola. The pelage is remarkably soft , the coloration is different from 

 that of any other Perognathus we have seen, being plumbeous, with little 



