MAMMALS OF THE MP:XICAN BOUNDARY. 



419 



This mouse lives principally in thickets surrounding rocks and 

 cliffs. It is chiefly nocturnal, but was sometimes taken in traps dur- 

 ing the day. Pregnant females taken at Mosquito Springs, May 18, 

 Huachuca Mountains, August 21 and 30, and Nogales, October 26, 

 contained, respectively, 3, 2, and 3 fetuses. A female was suckling 

 her young on June 27 in the vSan Luis Mountains. 



Record and measurements of 127 specimens of Peromyscus boylii pinaiis. 



Museum num- 

 ber. 



No 



20630 

 20621 

 20631 

 20632 

 20639 

 20637 

 20634 

 20635 

 20641 

 20629 

 20638 

 20640 

 20712 

 20716 

 20715 

 20711 

 20713 

 20714 

 20717 

 20704 



Head 



0_£J 



37201 

 37194 

 37073 



37074 

 37075 



37076 

 37317 



35932 



35782 



35776 

 35775 

 35777 

 35778 

 35785 

 35783 

 35780 

 35781 

 35787 

 skull. 

 35784 

 35786 

 35826 

 35830 

 35829 

 35825 

 35827 

 35828 

 35831 



1815 

 1832 

 1911 



1921 

 2010 



2013 

 2114 



806 

 807 

 808 

 809 

 810 

 815 

 816 

 817 

 818 

 819 

 820 

 824 

 826 

 828 

 829 

 830 

 831 

 832 

 833 

 836 



Locality. 



1 1892 



Mosquito Springs, Chiliauluia. [ May 18 

 near Monument No. 46. 



HachitaGrande,(lrant County, May 22 

 New Mexico, near Monument 

 No. 45. 



do I May 25 



Sex and 



.do 



San Francisco Canyon, cast side 

 of San Luis Mountains, near 

 Whitewater, Chiliuahua, Mex- 

 ico, near Monument No. 64. 



do 



San Luis Canyon, west side of 

 San Luis Mountains, near 

 Monument No. 66. 



do 



San Jose Mountain, Sonora, 

 near Monument No. 93. 



La Noria, near Monument No. 

 Ill, on Santa Cruz River 

 (camp just south of Mexico 

 line). 



Patagonia Mountains, Sonora, 

 near Monument No. 112. 



do 



do 



....do 



do 



do 



do 



do 



do 



do ; 



do 



... do 



do 



do 



do 



.....do 



do 



do 



do 



do 



June 3 

 June 24 



June 27 

 July 14 



July 19 

 Oct. 6 



Nov: 16 



...do... 



do... 



Nov. 17 



...do... 



...do... 



Nov. 18 



...do... 



...do.. 



...do... 



...do... 



....do... 

 Nov. 19 

 Nov. 20 

 Nov. 21 



....do.. 



....do.. 



....do.. 



....do.. 



....do.. 



.do I Nov. 22 



?ad. 

 cfad. 



?ad. 



cfad. 



icf ad. 



9 ad. 

 $ad. 



cfad. 

 cfad. 



d Juv. 



6 (fad. 



cfad. 



J. ad. 



J. ad. 



j.im. 



^im. 



Q ad. 



^ad. 



cf juv. 



$ Juv. 



rf ad. 

 a^ ad. 



5 ad. 



rf im. 



51 im. 



^ im. 



^ im. 

 C5 ad. 



'd 



ad. 



mm. 

 205 



196 

 202 



198 

 195 



204 

 200 



200 

 183 

 192 

 170 



177 

 207 

 185 

 175 

 157 



195 

 175 

 180 

 189 

 176 



103 

 111 



108 



101 

 93 

 97 

 116 

 105 

 93 



104 

 93 

 99 



105 

 94 



108 



mm. mm. 

 107 22. 



109 21.0 



21.0 

 24.0 

 21.5 



107 J 23.0 

 111 I 21.0 



106 2L0 

 114 22.0 



22.0 



and body, 93. * Head and body, 88. <^ Head and body, 97, 



192 

 dHead 



21.0 

 22.0 

 21.0 

 20.5 

 21.0 

 21.0 

 21.0 

 21.0 

 20.5 

 22.0 

 21.0 

 20.5 

 21.0 

 20.0 

 21.5 

 19.5 

 20.0 

 21.0 



j 20.5 



109 I 21.0 



and body, 



95. 



