BIRDS OF ARGENTINA, PARAGUAY, URUGUAY, AND CHILE 397 



In the extensive areas of diy scrub that covered the low hills near 

 Tapia, Tuciiman, the present form was common from April 6 to 13, 

 1921. An adult bird, probably a female, in molt was taken April 6, 

 and an immature male in process of change to the post-juvenal 

 plumage on April 7. Males sang occasionally during this period, in 

 spite of their ragged feathers. 



Measurements, in millimeters, of these specimens are appended in 

 the following table. It may be noted that the rectrices in this species 

 often indicate considerable abrasion so that their measurement is 

 variable. 



1 Measured from posterior end of gonys to highest point on culmen. 

 ' Preserved as a skeleton. 



D. S. Bullock secured a male of this form (with culmen from 

 base measuring 17.5 mm.) at Salta, on August 1, 1922. 



SALTATOR AURANTIIROSTRIS NASICA Wetmore and Peters 



Saltator aurantiirostris nasica Wetmore and Peters, Proc. Biol. Soc. 

 Washington, vol. 35, Mar. 20, 1922, p. 45. (El Salto, alt. 1,800 meters, 

 above Potrerillos, Province of Mendoza, Argentina.) 



A specimen of this subspecies Avas collected near Victorica, Pampa, 

 on December 27, 1920, and others were noted on December 29. The 

 birds frequented brushy areas in extensive forests of low, heavy- 

 trunked trees, where it was difficult to gain an idea of their actual 

 abundance. Males were singing constantly from tree tops, and here 

 rested among clumps of leaves rather than in the open. At Po- 

 trerillos, Mendoza, this form was seen at intervals from March 15 

 to 21, and one was observed near Tunuyan, March 23. In this 

 Province they inhabited thickets, often of rather low brush, but 

 had the retiring habit common to the species elsewhere. The species 

 seems to be a persistent singer, as from July to April I heard their 

 songs frequently when in their haunts. 



So far as laiown at present this subspecies ranges only in Mendoza 

 (Alto Verde, Potrerillos, and Mendoza) and western Pampa (Vic- 

 torica). It is characterized by longer, larger, and heavier bill. In 

 males the culmen from base measures 19-21 mm. ; depth of bill from 

 posterior end of gonys to highest point on culmen, 13.5-14.5 mm.; 



