248 NORTH AMERICAN FAUNA [No. 55 



PEROGNATHUS LORDI LORDI (GRAY) 

 NORTHWEST POCKET MOUSE 



Alromys lordi Gray, Zool. Soc. London Proc., p. 202, 1868. 



Type. Collected in southern British Columbia, Canada, by John Keast Lord, 

 probably in 1860. 



General characters. Largest of Oregon pocket mice, a little larger than 

 parvus with relatively larger audital bullae and narrower interparietal. Duller 

 and darker, more grizzled brownish over upper parts and ear spots scarcely 

 noticeable; lower parts mainly dark buff with generally a white patch on 

 breast and sometimes another on back part of belly; tail strongly bicolor, 

 dusky above, buffy below. 



Measurements. Typical adults: Total length, 183 mm; tail, 98; foot, 23.2; 

 ear (dry), 7. 



Distribution and habitat. From Ashcrpft and the Okanagan 

 country in southern British Columbia this species ranges down 

 through the Okanagan Valley to Wenatchee, diagonally across the 

 plains of the Columbia to Snake Eiver, and up the Grand Eonde 

 Valley into the extreme northeast corner of Oregon (fig. 55). A 

 specimen taken by Cantwell near Paradise, Wallowa County, Oreg., 

 is the only record for the State, and this is labeled 15 miles north of 

 Paradise, which would put it back in Washington. Assuming that 

 Cantwell knew in which State he was working and merely exag- 

 gerated the distance from Paradise down a steep and tiresome grade, 

 the species may be provisionally accepted for the State list until 

 other specimens are taken on the Oregon side of the Snake River 

 Canyon, or the lower valleys of Joseph Creek or the Imnaha Eiver. 



General habits. In habits these mice seem to differ but little from 

 parvus to which they are closely related, but generally they occupy 

 a more fertile and grassy country. 



Breeding habits. A female taken by L. E. Dice at Prescott, Wash., 

 July 7, 1914, contained eight small embryos, while half -grown young 

 were taken at the same time, implying more than one litter in a 

 season or an irregular breeding time. 



[PEROGNATHUS LORDI COLUMBIANUS MERRIAM 8a 

 COLUMBIAN POCKET MOUSE 



Perognathus columbianus Merriam, Acad. Nat. Sci. Phila. Proc., p. 263, 1894. 

 Perognathus lordi columfiianus Osgood, North Amer. Fauna No. 18, p. 40, 1900. 



Type locality. Pasco, Franklin County, Wash. Inasmuch as the Columbian 

 pocket mouse has been collected south of the Columbia River in the State of 

 Washington close to the boundary of Oregon, it probably occurs also in Umatilla 

 County. Since, however, specimens have not yet been taken in Oregon, this 

 subspecies is not here definitely included in the list of Oregon mammals.] 



PEROGNATHUS NEVADENSIS MERRIAM 

 NEVADA POCKET MOUSE 



Peroanathus nevadensis Merriam, Acad. Nat. Sci. Phila. Proc., p. 264, 1894. 



Type. Collected at Halleck, Nev., by Vernon Bailey, July 4, 1893. 



General characters. Smallest of the Oregon species; ears small without 

 inside lobe at base ; tail slender, not crested, longer than head and body ; cheek 

 pouches thinly lined with hair ; pelage silky ; color of upper parts buffy gray 



Oa Hypothetical. 



