56 MiCRonii'oDors — dipodomys. 



Microdipodops megacephalus Mci riaiii. Biological Survey coll. 



North Amer. Fauna, No. r,, j)]). 116-117, July .SO, 1891. 



ff|J|. Skin and .skull. Adult male. Ilallock, Elko Count}-, Nevada. 

 dctol)(>r 23, 181)0. Collected l)y V. Bailey. Original number 2005. 

 Well-made skin in good condition; skull perfect except for a few perforations 

 in right mastoid l)ulla and broken left zygoma. 



Microdipodops megacephalus oregonus Merriani. Biol. Suiv(\v coll. 

 Proc. Biol. Soc. Wash., XIV, ]>. 127, July 19, 1901. 



80128. Skin and skull. Young adult male. Lake Alvord, Oregon. 

 Augu.st 18, 1896. Collected by C. P. Streator. Original number 

 5430. • 



Well-made skin in good condition; skull perfect. 



Microdipodops pallidus Merriam. Biological Survey collection. 



Proc. Biol. S(jc. Wasii., XIV, pp. 127-128, July 19, 1901. 



98520. Skin and skull. Adult female. Ten miles east of Stillwater, 

 Nevada. May 11, 1898. Collected by H. C. Oberholser. Origi- 

 nal number 101. 



Well-made skin in good condition; skull perfect- 

 Genus DIPODOMVS. 



Dipodomys ambiguus Meiriam. Biological Survey collection. 



North. Anier. Fauna, No. 4, i)p. 42-45, October 8, 1890. 

 =Dipodomys merriami ambiguus (Merriam). See Merriam, Science, new ser., 

 VII, p. 81, January 7, 1898. 



MUl- Skin and skull. Adult male. El Paso. Te.xas. December 13, 

 1889. Collected by V. Bailey. Original number 782. 

 Well-made skin in good condition; skull perfect. 



Dipodomys merriami atronasus Merriam. Biological Survey coll. 

 Proc. Biol. Soc. Wash., IX, p. 118, June 21, 1894. 



50276. Skin and skull. Adult male. Hacienda La Parada, San Luis 

 Potosi, Mexico. August 20, 1892. Collected by L. W. Nelson. 

 Original number 3229. 



AVell-made .skin in good condition; skull lacking right audital bulla, hasi- 

 occipital, and adjacent j)art'< of brain ca.se; zygomata broken. 



Dipodomys californicus Merriam. Biological Survey collection. 



North Amer. Fauna, No. 4, p. 49, October 8, 1890. 



siflf- ''^I'^i" ii"<l skull. Adult male. Ukiah, California. May 4, 

 1889. Collected by Dr. T..S. Palmer. Original number Itl. 



Well-made skin in good condition; skull jn-rfcct. 



