PEROGNATHUS. 253 



Gen!. Char. '■'■'EAxnWz.t \.o P. penicillatus, but smaller; color about 

 the same; skull lighter and with longer and more slender rostrum." 



Color. " As in P. penicillatus.^' 



Measurements. "Total length, 191; tail vertebrae, 105; hind 

 foot, 24.4. (Dry skin)." (Osgood, 1. c.) 



b.—pricei. (Perognat/ius), Allen, Bull. Am. Mus. Nat. Hist., 1894, 

 p. 318. 



oiscurus, Allen, Bull. Am. Mus. Nat. Hist., 1895, p. 216. 



Type locality. Oposura, Sonora, Mexico. 



Geogr. Distr. South central Arizona into northwestern Mexico, 

 west of the Sierra Madre. 



Genl. Char. Smaller than P. penicillatus, but similar; no spines 

 on rump. 



Color. Above vinaceous buff lined with black; sides the same; 

 lateral stripe hardly perceptible; under parts white; ears like back; 

 tail dusky above, white below. 



Measurements. Total length, 172; tail vertebra-, 90; pencil, 10; 

 hind foot, 23: ear, 7.5. 



386. eremicus. {Perognathus), Mearns, Bull. Am. Mus. Nat. Hist., 



1898, p. 300. 



Type locality. Fort Hancock, El Paso County, Texas. 



Geogr. Distr. Western Texas, south into central Mexico. 



Genl. Char. Small; color pale; skull rather heav}-. 



Color. Above whitish drab tinged with fawn and lined with 

 dusky; lateral stripe faint; feet and lower parts white; tail above and 

 tip pale brown; beneath white. 



Measurements. Total length, 163; tail vertebrae, 83; hind foot, 

 22. 1 ; ear from base, 9. i . 



387. Stephens!. {Perognathus), Merr. , Proc. Acad. Nat. Scien. Phil., 



1894, p. 267, fig. 7. 



Type locality. Northwest Arm of Death \'alley (Mesquite Valley), 

 California. 



Geogr. Distr. Only known from type locality. 



Genl. Char. Small; ears medium, tragus higher than broad. 



Color. Above buffy drab to pale brown; fore legs, feet and 

 under parts white; tail above, including pencil, slightly darker than 

 back, beneath white. 



^^easuremcnts. Total length, 177; tail vertebra-, 96; hind foot, 21. 



388. intermedius. (Perognathus), Merr., N. Am. I'aun., No. i, 1889, 



p. 18, pi. II, fig. 13. 

 obscurus, Merr., N. Am. Faun., No. i, 1889, p. 20. 



