2 8 Bulletin American Museum of Natural History. [Vol. V, 



slope. San Diego was for some time (Feb. 16 to May 6) the 

 base of operations, from which trips were made to Guanopa, Rio 

 Chico and Tatuara (Feb. i5~March i). 



The specimens of birds and mammals were collected principally 

 by Mr. F. Robinette, of Washington, D. C. A few were collected 

 by Mr. A. D. Meeds, of Minneapolis, Minn. Unfortunately no 

 notes accompany the specimens, beyond the locality and date 

 of collecting, and many of the localities are not on published 

 maps. 



MAMMALS. 



1. Lepus alleni M earns. Two specimens, Oputo, Oct. 27. 



2. Lepus arizonae Allen. One specimen, San Diego, north- 

 ern Chihuahua, Nov. 5. 



3. Thomomys umbrinus (?Rich.). Seven specimens, Juarez, 

 northern Sonora. Referred provisionally to this species, and 

 doubtless the same as T. umbrinus of Baird, based in part on 

 Sonoran specimens. 



4. Perodipus sp.? One specimen, imperfect, and without 

 label. 



5. Mus musculus Linn. Three specimens, Juarez, northern 

 Sonora. 



6. Neotoma mexicana Baird. One specimen, Cachuta, 

 northern Sonora, Oct. 3. 



7. Sigmodon hispidus arizonae Mearns. One specimen, 

 Granados, Nov. 16. 



8. Onychomys sp.? One specimen (in poor condition), 

 Jaurez, northern Sonora. 



9. Cynomys arizonensis Mearns. Three skins, San Diego, 

 Chihuahua, Nov. 14, 1891, A. D. Meeds. 



10. Sciurus aberti Woodh. One skin, in the gray phase, 

 and an additional skull and skeleton. Without labels, but prob- 

 ably taken in December, on the upper Bavispee River. 



