MAMMALS OF THE MEXICAN BOUNDARY. 



Ill 



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

 Benclire, Henshaw, Nelson, F. Stephens, BroWn, Scott, and Price, 

 The w^riter also visited the place in April and May of 1885, and 

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

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



Station No. 48. — Warsaw Mills, Pima Coiint}'^, Arizona. This 

 camp was located at springs in Holdens Canyon in the Pajaritos 

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

 132. 505 kilometers (314 miles) w^est of the Rio Grande, and 354 

 kilometers (220 miles) east of the Colorado Eiver. Altitude, 1,220 

 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 

 {Que7'cus ohlongifoUa and Q. ernoryi). Birds and mammals were 

 scarce in the vicinity, though numerous in more favorable localities 

 in the neighborhood. Renunierative trips were made to Monument 

 No. 127, and to Bear Valle}^, near Oro Blanco Picacho, at the head 

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

 fish, and tributary to the .Vltar 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 Avere 

 observed in the Pajaritos Mountains, between Monuments Nos. 122 

 and 140 : 



Pinus cciiibroiclcs Engelmaun. 



Juniijcnis pitchiiphhia Torrey. 



Yucca brevi folia Torrey. 



Yucca sp. 



Juglans rupestris Eiigelmann. 



Salix nigra Marshall. 



Salix occidentali.s longipcs (Anders- 

 son) Bebb. 



Salix taxifolia HnmboUlt, Bonpland, 

 and Kuntb. 



Populus frcmontii Watson. 



Qucrcus ohlongifoUa Torrey. 



Qucrcus arizonica Sargent. 



Quercus toumciji Sargent. 



Qucrcus chrysolcpis Liebniann. 



Oc/t/.s occidoitalix Linnuais. 



Moras ccUhlifolia Huniltoldt, Bon|)land, 

 and Kuntb. 



Platanus tcrightii Watson. 



Cercocarpus parvifolins paucidcntatus 

 Watson. 



Frail Ks salicifolia Humboldt, Bon- 



plaud, and Kuntb. 

 Acacia grcggii Gray. 

 Prosopis glaudiilosa Torrey. 

 Parlcinsonia aculeaia Linnanis. 

 Parhiiisonia microplujUa Torrey. 

 Rohiiiia iicomcxicana Gray. 

 Ptelca trifoUata Linnams. 

 Sapindus marginatus Willdenovv. 

 Cercus gigaiitcus Engelniann. 

 Opuiitia fulgida Engebnann. 

 Opuntia versicolor Engebnann. 

 Opuntia spiiiosior (Engebnann) Tou- 



niey. 

 ArctostapJnjlos paugciis IIunil)()ldt, 



Bonpland, and Kuntb. 

 Zizyphus oMusifolius Gray. 

 Fraxinus velutina Torrey. 

 Chilopsis linearis (Cavanilles) Sweet. 

 Sambucus mcxicana Presl. 

 Nicotia)ia glauca Grabani. 



