196 



paler and redder above (between russet and tawny, instead of Rood's brown). 

 Under parts paler; throat pale ochraceous salmon instead of light vinaceous 

 cinnamon; breast pale gull gray instead of light neutral gray. 



Measurements. 

 Piaya cayana mogenseni 



1 cf from Tucumd,n, Argentina (type) : 



Wing, 156; tail, 349; bill from base, 32.75; tarsus, 39.5. 

 3 cT ^ from Santa Cruz, Bolivia : 



Wing, 150-155 (152); tail, 315-345 (3i28.3); bill from base, 31.5-37 

 (34.7);tarsus, 37-40 (38.3). 

 193 from Santa Cruz, Bolivia: 



Wing, 150; tail, 310; bill from base, 31.5; tarsus, 35.5. 



1 (sex?) 3 from Santa Cruz, Bolivia: 



Wing, 155; tail, 296 (worn); bill from base, 35; tarsus, 40.5. 



Piaya cayana macroura 



2 cf from Misiones, Argentina: 



Wing, 155-171 (163); tail, 330-371 (350.5); bill from base, 32.5-33.25 

 (32.87); tarsus, 40-40.5 (40.25). 



3 9 from Misiones, Argentina : 



Wing, 158-169 (161.8); tail, 317-364 (333); bill from base, 31.75- 

 34.5 (33.58); tarsus, 40.5-43.5 (41.58). 

 3 (sex?) from Misiones, Argentina: 



Wing, 158-170 (162.7); tail (2 spec), 341-346 (343.5); bill from base, 

 32-34.25 (33.3); tarsus, 40.5-42.75 (41.75). 



Range. — Not definitely known, but probably extending through 

 the subtropical portions of Tucuman, Salta, and Jujuy, and 

 north into Bolivia, somewhere meeting the range of holiviana. 

 Eastward mogenseni doubtless intergrades with macroura. 



Remarks. — This is a strongly marked form resembling macroura 

 in size, particularly in the great length of the tail, but in colora- 

 tion it most nearly approaches Columbiana, though not quite so 

 pale as that form, and lacking the distinct rufous tone to the under 

 surface of the tail. 



2 Coll. Carnegie Museum. 



