308 EODENTIA. 



of the Himalaya by the entirely different character of its coloration, M. homurus 

 having a yellow muzzle and brownish-yellow feet. 



The skull has the parietal region more contracted than in M. urhcmus, and much 

 more so than in M. homurus, and the posterior margins of the frontals are back- 

 wardly prolonged into the parietals, more so than in M. homurus. The nasals of 

 M. urhanus contract to a point posteriorly, while those of M. homurus are posteriorly 

 truncated, but in this species these bones are more elongated than in either of 

 these small mice, and their posterior ends are narrower and more backwardly 

 prolonged. The molar lines of teeth are about the same length in these three 

 species. 



Inches. 

 Aged $, 



Inferior border of foramen magnum to tip of premaxillse 0"80 



Tip of premaxillse to anterior end of palate 0'32 



Length of palate q--[5 



„ molar line ••••.......... 0'14 



Inferior margin of external border of infraorbital foramen to tip of premaxill£e . . . 0-21 

 Breadth across parietals 0'37 



I procured only one example of this mouse at Ponsee, where it occurs on the old 

 rice and Indian-corn clearings. 



*Mus yicuLORUM, n. s. 



Muzzle rather sharply pointed, moderately long and not deep. Ear moderately 

 large, rounded, its height a httle in excess of the distance between the inner canthus 

 and the front of ,the muzzle, its breadth equalling that distance. Hind feet not lono-, 

 equalling the interval between the tip of. the lower lip and the base of the ear 

 posteriorly ; claws compressed, moderately long and sharp. Tail a little longer than 

 the body and head ; finely ringed, five rings to the one-tenth of an inch. Eur short, 

 soft, and dense, dull dark-brown on the upper parts, tending to blackish on the back, 

 paHng to brownish on the side, and passing into pale dusky -brownish on the under 

 parts, with a silvery sheen. Eeet brownish ; toes with shining greyish yellow hairs ; 

 ears and tail brown. 



I Inches. 



Mature 5. 



Tip of snout to vent , 2-90 



Vent to tip of tail , 3-24 



Hind foot ••••.,.,..,.,... 0'67 



Height of ear 0-45 



Breadth of ear q.^ij 



This mouse is perfectly distinct from M. homurus and M. urhanus and also from 

 the previously described species. Erom the latter it is distinguished by its relatively 

 shorter tail and smaller ears, and from M. homurus by its proportionally longer tail 

 and larger feet. 



The skull is very much less globose than the skull of M. homurus, and the 

 posterior ends of the frontals are nearly transverse, and the molar line is a little 



