MAMMALS OF THE MEXICAN BOUNDARY. 



367 



Type-locality. — Sweden. 



Description. — Size small. Length, 180 mm.; tail vertebrae, 85; 

 hind foot, 19; oar from notch, 15. Color, brownish gray above, paler 

 (sometimes pinkish) below. Mammse, 4 (often 5) pairs. Iris dark 

 brownish gray. 



Remarks. — Found in greater or less abundance in all of the settle- 

 ments of the Southwest. In addition to the localities from which 

 specimens are listed, I have seen the house mouse in Prescott, Arizona, 

 in 1884, at Phoenix in 1885, and at Flagstaff, Arizona, on Jime 20, 1886. 

 None were seen or heard of in the Mexican towns on the Sonoyta 

 River, in the State of Sonora, Mexico. 



. Record and measurements of 19 specimens of Mus musculus. 



2268 

 2340 



2341 

 2342 



1444 

 1504 

 1605 

 1506 



Locality 



Fort Clark, Kinney County, 



Texas. 

 Fort Hancock, El Paso County, 



Texas. 



-do. 

 .do. 



l>ate. 



El Paso, Texas. 



do 



....do..-. 



....do 



2584 Town of Santa Cruz, Sonora.. 



-.2614 do 



2615 I do 



2652 Tucson, Arizona 



109 Fort Verde. Arizona . 

 132 '.....do 



270 ' 



.do. 



3104 Yuma, Arizona 



3592 Jacumba, San Diego County, 

 Calitomia. 



1717 Rose Canyon, San Diego County, 



Calilornia. 

 1666 ' do 



1893. 

 Feb. 5 



June 15 



June 16 

 ....do... 



1892. 

 Feb. 16 

 Feb. 24 

 ....do... 

 ....do... 



:S93. 

 Oct. 22 

 Oct. 23 

 ....do... 

 Nov. 1 



1884. 

 July 13 . 

 Sept. 21 



1885. 

 Oct. 22 



1894. 

 Mar. 8 

 May 28 



1895, 

 Aug. 15 



Aug. 10 



Sex and 

 age. 



9 im. 



ojad. 



6? ad. 

 e? ad. 



cT im. 

 9 ad. 



cf im. 



,.' ad. 



i'9ad. 



d im. 



li^ad. 



(19 ad. 



rfad. 

 9 juv. 



cf ad. 

 cf juv. 



cfjuv. 

 9 ad. 



mm. 

 159 



184 

 184 



161 

 176 

 168 

 182 



180 

 155 

 170 

 180 



175 

 172 



180 



158 



150 

 190 



79 

 100 



5S 



mm. 

 19.0 



210 



20.0 

 20.0 



19.0 

 18.0 

 19.0 

 18.5 



18.5 

 18.0 

 18."5 

 18.5 



18.0 



20.5 

 19.0 



mm. 

 10.0 



12.5 

 12.5 



10.0 

 12.0 

 10.5 

 12.0 



12.0 

 10.3 

 11.5 

 11.5 



14.0 



11.0 

 10.7 



oMaramDe, 4 pairs. 

 6 Mammas, 5 pairs. 



cMamra«, 5 pairs. Iris dark, brownisli gray. 

 iJ Strongly yellowish. Mamms, 5 pairs. 



« American Museum of 

 Natural History. 



Subfamily CRICElTl]Sr.ffi:. 



Grinding teeth rooted and either flattened (in the genera Sigmodon, 

 Nectomys, etc.) or tuberculated {Onydiomys, Baiomys, Peromyscus, 

 Oryzomys, Reithrodontomys, etc.). When tuberculate, the tubercles 

 are arranged in two longitudinal rows, 



