41 



and body. The markings of its tip are peculiar : a black spot occu- 

 pies the fur covering the end of the caudal vertebree, and about one 

 half of the space beyond their termination, the remaining half being 

 pure white. 



'ITie specimens are young, and have probably not attained their 

 full growth. The crowns of their molar teeth are not at all wom. 



Spermophilus macrourus. Sperm. auriculis mediocribus ; niger, 



ttlbo subfasciatim creberrinie irroratus ; capite nigro, pilis albis 



adfaciem parce sparsis; palpebris albis ; labiis mentoąue ferrU' 



ffineis ; ventre ferrugineo nigro vario ; caudd longd nigro alboque 



varid. 



Long. cor/>om cum capite, 11-į-unc. ; caudce, 7 ; caMrf« cum pilis, 8^. 



The black head, on which a very few white hairs exist, and the 



pūrely white eye-lids, are very conspicuous marks of this species, 



which is nearly related to Spermm. Franklinii, Beecheyi, &c., by the 



length of its tail, the similar markings on aU sides of this organ, and 



the laxness and length of the hairs -v^hich cover it. The hair on the 



body is short, adpressed, and firm but not harsh. The markings on 



the back and sides consist of -vvhite, undulating, interrupted and fre- 



quent transverse white stripes on a black ground ; the black predomi- 



nating along the middle line of the back, and the white on the sides. 



SciūRus NiGRESCENS. Sci. uigev, albo arenoso-varius ; subtilspal- 

 lidior, grisescens ; maculd post-auricnlari albidd ; caudd nigro 

 albogve varid. 



Long. corporis cum capite, 11-J- unc. ; cauda, lO-į- ; caudte cum 

 pilis, 14. 



The hairs of the upper surface are rather long, soft and smooth ; 

 each of them is tipped with white, occasioning, "v^hen viewed in cer- 

 tain lights, an iron-grey colour : on the under surface the black is 

 less deep, and the white tips are longer than on the upper surface. 

 'Hie colour of the limbs corresponds \vith that of the adjoining siir- 

 faces, except on the upper part of the tarsus, -vybere it is black ; on 

 the toes, however, the hairs are again freely tipped mth vhite. The 

 long hairs of the tail are nearly all terminated by -Cvhite, occupying 

 the terminai fourth or fifth part of their length; hence the sides and 

 extremity of that organ are nearly \vhite, the black being most con- 

 spicuous along its middle, tind for about the first ąuarterof its length. 



The pale spot behind each ear, if permanent in the species, will 

 fumish a ready distinguishing mark. 



Lepus nigricaudatus. Lep. vellere mollissimo, pilis raris elongatis 



sericeis intermixtis ; supra nigrescenti flavidoque varius, infroL et 



ad clunes artusque albus ; nuchd cauddąue superni nigris ; gutture 



fiavescente ; tarsis saturate rufis • auriculis ad apices albis. 



Long. corporis cum capite, 23 unc. ; capitis ante aures, 4 ; auri- 



cula, 5 ; tibi<e, 4-j- ,• pedis postici, 4-5-. 

 Tlie softness and general appearance of the fur resemble those of 

 a Rabbit rather than of a Hare. The colouring of the imder surface 

 is separated from that of the upper by a distinct line about the middle 



