248 PEROGNATHUS. 



parvus. (Ferognaikiis), Baird, N. Am. Mamm., 1857, p. 425. 



Type locality. Oregon. 



Genl. Char. "Head ovate, the snout elongate, pointed and cov- 

 ered with hair excepting the nostrils, which are small and convolute; 

 lips large, tumid and covered with short hairs; whiskers numerous, 

 white; a tuft of white hairs or bristles on the chin; cheek pouches 

 spacious, opening outside of the mouth and reaching from the upper 

 lip to the throat; the cavity extending backward from the ears and 

 lined with hair; eyes medium size; ears small, round, and fringed 

 with hairs; fore legs small, the feet moderate and margined with 

 bristly hairs; the nails short, curved, excepting that of the thumb, 

 which is orbicular or resembling the human thumb nail; hind legs 

 long, the feet large and strong, five-toed, the middle one slightly 

 longer than the rest; inner toe shortest, reaching only to the end of 

 the metatarsal bones of the others; all the nails short, pointed and 

 slightly curved; tail long, tapering, and clothed with silky hairs." 



Color. "Above sepia brown, beneath white, a dark line across 

 the cheeks beneath the eyes." 



Measurements. "Length of head and body i 9-10 inch; head 

 from nose to occiput, 9-10 inch; ears, 3-20 inch; tail, 2 3-10 inches; 

 fore leg from the elbow, 9-20 inch; fore foot, 3-10 inch; tibia, 7-10 

 inch; hind foot, 3-10 inch; metatarsus, 5-10 inch." (Peale. ) 



Peale says of this specimen: "The formation of its hind legs 

 leaves but little room to doubt that its habits are similar to the jump- 

 ing mice Mcriones labradorius (Richardson), which are inhabitants of 

 the same region. Its singularly large head which exceeds its 

 BODY IN bulk, its ample cheek pouches, long hind legs, and long tail 

 present a general form which is peculiar and altogether very remarka- 

 ble. * * * * Xhe specimen is a female, and presents the rudi- 

 ments of a fourth molar tooth in each side of the lower jaw, which 

 would eventually have replaced the front ones, already much worn." 



379. monticola. (Perognathus), Baird, Mamm. N. Amer. , 1857, p. 422, 

 pi. 51. 

 parvus, Osgood, N. Amer. Faun., No. iS, 1900, p. 34 (nee Peale). 



Type locality. St. Mary's Mission, Montana, west of Rocky 

 Mountains? (Baird). The Dalles, Oregon? (Osgood). 



Geogr. Distr. Valley of the Yakima River, Washington, and 

 thence southeast to central and southeastern Oregon. 



Genl. Char. Tail longer than head and body, antitragus lobed; 

 bullae meeting below basisphenoid. 



Color. Above mixed cinnamon and dusky; beneath white; hairs 

 plumbeous at base; lateral stripe pale cinnamon; outside of fore leg 

 dusky; feet whitish; tail above like back, beneath like belly. 



