MAMMALS OF I'll I. MEXICAN IJOUNDARY. 



Ill 



most conspicuous. This is a well known collecting ground of Messrs. 

 Bendire, Henshaw, Nelson, E. Stephen-. Brown, Scott, and Price. 

 The writer also visited the place in April and May of L885, and 

 again in November, 1893. Mr. Holzner camped there from Novem- 

 ber 5 to 20, 1893, collecting 70 birds and 32 mammals. 



Station No. 48. — Warsaw Mills, Pima County, Arizona. This 

 cam]) was located at springs in Ilohlens Canyon in the Pajaritos 

 Mountains, about 2 kilometers (1.75 miles) north of Monument No. 

 lo'2. 505 kilometers (oil miles) west of the Rio Grande, and 354 

 kilometers (220 miles) east of the Colorado River. Altitude, L,220 

 meters (4,003 feet). I was there from December 1 to 7, 1893, and Mr. 

 Holzner, from November 29 to December 7, 1893. For collecting, this 

 camp was unfavorably located, in a barren and rocky canyon. The 

 only timber was a scanty growth of glaucous-blue and Emory oak 

 (Quercus oblongifolia and Q. 'emoryi). Birds and mammals were 

 scarce in the vicinity, though numerous in more favorable localities 

 in the neighborhood. Remunerative trips were made to Monument 

 No. 127, and to Bear Valley, near Oro Blanco Picacho, at the head 

 of Canon de los Alisos, where a stream of fresh water, containing 

 fish, and tributary to the Altar River, was shown us by Mr. C. W. 

 Kempton, the manager of El Volador Mine, at Oro Blanco. Some of 

 the nearer canyons were well wooded with cottonwood, oak. walnut, 

 hackberry. and sycamore, but were too difficult of access to be vis- 

 ited often from our camp at Warsaw Mills. 



Flora of Pajaritos Mountains. — The following-named trees were 

 observed in the Pajaritos Mountains, between Monuments Nos. L22 

 and 140: 



Finns cenibroides Engelmann. 

 Juniperus pachyphlosa Torrey. 

 Yucca brevifolia Torrey. 



YUCCO Sp. 



Juglans rupestris Engelmann. 



Salix nigra Marshall. 



8alix occidentalis longipcs (Anders- 

 son) Bebb. 



Salix taxifolia Humboldt, Bonpland, 

 and Kunth. 



Populus fremontii Watson. 



Quercus oblongifolia Torrey. 



Quercus arizonica Sargent. 



Quercus toumeyi Sargent. 



Quercus chrysolepis Liebmann. 



i 'fit is occidentalis Linnaeus. 



Morus celtidifolia Humboldt, Bonpland, 

 and Kunth. 



Platanus wrightii Watson. 



<'i rcocarpus parvifolius paucidentatus 

 Watson. 



Prunus salicifolia Humboldt, Bon- 

 pland, and Kunth. 



Acacia greggii Gray. 



Prosopis glandulosa Torrey. 



Parkinsonia aculeata Linnseus. 



Parkinsonia microphylla Torrey. 



Robinia neomexicana Gray. 



Ptelea trifoliata Linnaeus. 



Sapindus marginatus Willdenow. 



Cereus giganteus Engelmann. 



Opuntia fulgida Engelmann. 



Opuntia versicolor Engelmann. 



Opuntia spinosior (Engelmann) Tou- 

 rney. 

 Irctostaphylos pungens Humboldt, 

 Bonpland, and Kunth. 



Zisyphus obtusifolius Gray. 



Fraxinus velutina Torrej . 



Chilopsis linearis (Cavanilles) Sweet. 



Sambucus mexicana Presl. 



\ icotiana glauca Graham. 



