504 



MONOGRAPHS-OP XOKTn AMERICAN RODENTFA. 



iii]|i 



ii^-»i,'^ 



My series of specimens does not suffice for n complete exposition of the 

 variation in color of this species. In all, the lateral stripe is conspicuous, and 

 the other characters ditTer little I note, however, a decidedly richer tone 

 in Mexican and Texan specimens than in those from Kansas and Nebraska. 

 It is probable tiiat the skull of this animal, when examined, will alFord some 

 specific characters, in size nt least, if not in details of conformation. The 

 veneral)le Dr. G. Lincecum, of Texas, lately deceased, lias given notes on the 

 habits of this species, in two special articles, below cited.* 



. PEROGNATHUS PENICILLATUS, Woodh. 



, • ' ■ Tuft-tailed Pooket-ir se. 



Peroyiittlhut peneciUatm, WfiODri.,t Proc. Acod. Nut. Sii. Pbila. vi, 18.5:1,200 (San FriinciBco MU., Arizonn). 



PerognalliHs pmicillatuttVfooDii., 8it|;r<avr»'K Rup. Kxpl. Znfli niiil Coi. K. IK^i^, 4!), pi. 3.— LkC, PriMi. 

 Acad. Nut. Sci. Pbilu. IK>\, 225 (iiiuro iiieiitioii).— Add. & Bach., Q. N. A. iii, 1(^4, a08 

 (copiiMl from Wixidh.).— lll>., M. N. A. 1657, 41H, pi. EC, f. 5.— Giiav, P. Z. 8. IWW, aoi (wrong 

 locality assigned) t— ColiEs, Am. Nut. i, 1SC7, ;iU7 (Arizona) —CoUKS, Proc. Pbilu. Acnd. 

 ia75, 8M7 (nu.u(>;;rapbii;).— ColKs & Yaurow, Zuol. Expl. W. 100 Merid. 1876, 110. 



Peroynalhtti parvus, LeContk, Pioc. Acul. Nat. 8i-i. Pbila vi, 1853, 826 (in part. Not Crieelodipua pairtu, 

 Peale.) (The npucinieu noticed from the Colorado Desert is now before me ; it ih apparently 

 » very youug azumple of i*. peniciUatun.) 



DiAONOSis. — About the size of Hespfiomys leucopus. Tail vertehrse obvi- 

 ously longer than head and i)ody. Hind foot more 'han one-fourth the length 

 of head and body. Tail crested above toward the end, .mri with long term- 

 inui pencil of hairs. Soles <listinclly naked to the heels, at least along a 

 median .strip. Antitragus distinctly lobed, with a sharp teat-like projection, 

 opposite which is another smaller but distinct lobe of the tragus, the notch 

 of the ear being defined by these two prominent jioints, the edge of the ear 

 itself not bounding the notch at all. No appreciable fulvous stripe along the 

 sides, where the color of the upper parts meets the white of the under parts 

 without intervention of a third color. Aliove, "gray" — an intimate mixture of 

 ■yellowish-gray with a dull gniyish-brown ; below, including whole fore leg, 

 fore and hind feet, and itiner aspect of thighs, white ; tail bicolor — dark al)ove, 

 white below. Length about 3.25 inches T" .,--3fiJ); tail vertebrm about 

 4.00 (ii.aO-iAO), with a tuft half an inch or more longer. Soles about 0.95 

 (0.90-1.00); ear above notch, 83 (0.30-0.35). 



• Poncbe<l UaL < Ain. Nat. vi, Inli, pp. Hfi'J, 370. 



y Tbe AuimulH of Texas. < Am«r. Sports .liin (newspaper) of Feb. 28, 1874. 



) Special pnper : " Description of u new speciiis of Perngnatbns, Wied." < he. cit., pp. 200, 2C1 

 (TbuSan Francisco Mountains are several bnndred niibs from San I'^ancisco City, Calllbrnia, 



Doorly in the middle of Arizona— formerl; a part of New Mexico. The locality appeani to pntr.lc soma 



writers. 



