MILLER AND REHN : NORTH AMERICAN MAMMALS. 155 



Perodipus streatori Meniam. 



1894. Pirodlpus fftreatori Merriam, Proc. biol. soc. Wash- 

 ington, IX, p. 113. June 21, 1894. 

 Type locality. — Carbandale, Mariposa County, California. 



Genus MICRODIPODOPS Merriam. 



1891. 3Iicro(Jipod<)ps Merriam, North Amer. fauna, no. 5, p. 

 115. July 30, 1891. Type. — MicroiUpodops inr(/acephah(s^l^K- 



RIAM. 



Microdipodops megacephalus Merriam. 



1891. MIri'odljiodoj's iiie</actph<dus Merriam, North Amer. 



fauna, no. 5, p. 116. July 30, 1891. 

 Type locality. — Halleck, East Humboldt Valley, Elko 

 County, Nevada. 



Subfamily Heteromyixae. 



Genus PEROGNATHUS Wied.i 



1839. PeriMj)u(tliHfi Wied, Nova acta phys. med. acad. caes. 

 Leop.-Carol., xix, pt. i, p. 808. Type. — Fin'fxjnatlnia fasckitus 

 Wied. 



Subgenus PERO(iXATHus. 



*Pei-ognathus fasciatus Wied. 



1839. PerognatJms fasciatus Wied, Nova acta phys. med. 

 acad. caes. Leop.-Carol., xix, pt. i, p. 369. 



1 Revised by Merriam (Nortli Ainer. fauna, no. 1, October 25, 1889) and Osgood (North 

 Amer. fauna, no. 18, September 20, 1900). 



