250 PEROGNATHUS. 



Geogr. Distr. Southeastern California. Known from type 

 locality only. 



Genl. Char. Small; tail about equal in length to head and body; 

 ears white. 



Color. Above yellowish brown lined with blackish; base of hairs 

 plumbeous; lateral stripe tawny. Legs, feet and under parts white; 

 tail above, proximal half tawny, distal half blackish; beneath white. 

 Ears white within and without. 



Measurements. Total length, 157; tail vertebrae, 77; hind foot, 

 20; ear, 5. 



381. lordi. (Afiromys), Gray, Proc. Zool. Soc, 1868, p. 202. 

 Type locality. "British Columbia." 



Geogr. Distr. Southern British Columbia to plains of the 

 Columbia River, Washington. 



Genl. Char. Tail longer than head and body; antitragus pres- 

 ent, but no anterior projecting lobule. 



Color. Above slaty buff strongly mixed with black; beneath buff, 

 large pectoral and inguinal patch white. White spot at base of ear. 

 Fore feet buff, hind feet white. Tail, basal half dusky mixed with 

 buff, apical half and tip black; beneath pale gray. 



Measurements. Head and body, 175; tail vertebra;, 91; hind foot, 

 23; ear, 6.5. 



a.—colujnbianus. {Perognatkus), Merr. , Proc. Acad. Nat. Scien. 

 Phil., 1894, p. 263, fig. 2. 



Type locality. Pasco, Plains of the Columbia, Washington. 



Geogr. Distr. Southern Washington. 



Genl. Char. Large; colors pale; tail longer than head and body. 



Color. Above smoky gray mixed with blackish, tinged with oli- 

 vaceous; faint lateral stripe; tail above, pale on proximal half, darker 

 apically. 



Measurements. Total length, 187; tail vejtebrae, 96; hind foot, 

 23; ear from anterior base, 9. 



382. formosus. (Pn-ognathus), Merr., N. Am. Faun., No. 11, 1889, 



p. 17. 



Type locality. St. George, Utah. 



Geogr. Distr. Southwestern Utah, southern Nevada and adjacent 

 portion of California. 



Genl. Char. Large; ears large with antitragal lobe; tail crested 

 longer than head and body; soles naked. 



Color. Above grizzled yellowish brown mixed with black; below 

 white; tail, proximal third above like back, remainder graduated sooty 

 brown; beneath yellowish white. 



