514 



MONOGRAPHS OF NORTH AMERICAN IfODENTIA. 



original colors cannot be in Ihe leasl discovered. The other, in better stain, 

 shows the characters pretty well.- There is a strong fulvous or salmon- 

 colored stripe along the whole body, just as in P. fascia tus. The light color 

 of the upper parts is rather a pale cinnamon than the sandy yellowish of 

 P. fasciatus-. The hairs are light plumbeous at Imse, and many of them are 

 tipped with black, giving the dark surface-lining. The tail is sharply bicolor, 

 to correspond with the body. The under parts, including the whole fore leg 

 and the foot and inside of the hind leg, are white. 



As in the case of P. monticola, further information respecting this species 

 is much to be desired, particularly as there appear to be some Mexican ani- 

 mals of this genus with which we are at present not well acquainted. The 

 following measurements are those given by Baird in his original notice: — 



Tam.e III. — Measurements of two specimens of PEROGNATHS nisriDUS. 



In my previous '' Review '' of this family (Proc. Phila. Acad. 1875, 29^), 

 I quoted the original notice* of "Abromys lordi" of Gray (P. Z. S. 1868, 202), 

 observing that "we may suppose the animal to be a Perognatlius, from the 

 general tenor of Dr. Gray's remarks, and his curiously mixed-up quotations ; 

 and it is perhaps P. monticola " This supposition is probably verified 



* The following is the origiual notice of the genus and species in full : — 



" 3. ABROMYS, Gray. 



"Upper cutting teeth with a longitudinal groove; fur soft, abundant, uniform, long, and close. 

 Tail tapering, cylindrical, covered with short hair almost hiding the rings of scales. 

 " I'eroi/nathus, sp., S. Baird, Mamm. N. A. 423. 



"Abromys lokdi. B. M. 



" Fur soft, abundant, gray-washed, with blackish tips ; chin and under side of body whitish ; tail 

 tapering, gray, with a blackish-brown upper surface and tip ; hair of the back dark lead-color, with a 

 short gray band and minute black tip. 



"Peroguathns mouticolor [sic]. Lord, in B. M. 



" ? Peroguathns monticola, S. Baird, Mamm. N. A. 422, t. 51, f. 3 (skull). 



"Hab. British Columbia (Lord). 



"The teeth destroyed. Length of body and head 3 inches, of tail 3 inches. It differs from 

 Dipodomys nhillipsii and other species of that genus in having no white spot over the eye at the base 

 of tho ear, or white band across the thigh." 



