330 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH SER. 
Type locality—Mexican boundary monument no. 258, shore 
of Pacific Ocean, near Tia Juana, San Diego County, Califor- 
nia. 
Range—Apparently Upper Sonoran zone close to the ocean 
shore; known only from the type locality, and from a similar 
place in the extreme northwestern corner of San Diego County 
(Stephens, Calif. Mammals, 1906, p. 165). 
Perognathus bombycinus Osgood 
Yuma Pocket Mouse 
Original description—Perognathus bombycinus Osgood, 
Proc. Biol. Soc. Wash., 20, February 23, 1907, pp. 19, 20. 
Type locality—Yuma, Arizona. 
Range—Lower Sonoran zone in extreme southeastern 
corner of Imperial County: vicinity of Pilot Knob (Mus. Vert. 
Zool.). 
Perognathus longimembris longimembris (Coues) 
San Joaquin Pocket Mouse 
Original description—Otognosis longimembris Coues, Proc. 
Acad. Nat. Sci. Phila., August, 1875, p. 305. 
Type locality—Fort Tejon, Kern County, California. 
Synonyms—Perognathus mornatus Merriam, N. Amer. 
Fauna, 1, October, 1889, p. 15 (type from Fresno, California) ; 
Cricetodipus parvus; Perognathus parvus. 
Range—Sonoran zones in the San Joaquin and Sacramento 
valleys, from Fort Tejon, Kern County, north to Sites, Colusa 
County, (Musy Vers) Zool; Vaylor Uni, (alin) Publ Zool 
LOMOT2ZT ppalaondlio2))» 
Perognathus longimembris neglectus Taylor 
McKittrick Pocket Mouse 
Original description—Perognathus longimembris neglectus 
Maylor, Univ, Caliz Puls Zool, 10) May 21s ao pi lhoon 
Type locality—McKittrick, Kern County, California. 
Range—Lower Sonoran zone on west side of southern San 
Joaquin Valley: vicinity of McKittrick, Kern County, and 
Simmler, Carrizo Plain, San Luis Obispo County (Mus. Vert. 
Zool. ). 
