334 FIELD MUSEUM OF NATURAL HISTORY ORNITHOLOGY, VOL. I. 



a. Back cinnamon rufous, or chestnut rufous. 



a' Wing less than 177 mm. 



Black tail band about 23; exposed outer webs of 

 second and third (outer) primaries plain or with a 

 small white spot at the base. 



C. s. perplexa, p. 327. 

 b' Wing more than 177 mm. 



Black tail band, about 29 (28 to 34); tail, about 131; 

 outer web of second (outer) primary plain or with 

 one small white spot; spots on outer web of third 

 primary small; outer web of fourth plain. 



C. s. ochracea, p. 326. 



Black tail band, about 20 (18 to 23); tail, average 

 about 131; white spots on outer web of third (outer) 

 primary larger; the outer web of fourth plain. 



C. s. intermedia, p. 325. 



Black tail band, about 18 (15 to 21); tail long, 138 

 to 144; outer webs of second, third, fourth, and fifth 

 (outer) primaries with large white spots. 



C. s. andina, p. 323. 



b. Back vinaceous cinnamon. 



Wing more than 1 70 mm. C. s. margaritensis, p. 331. 

 Wing less than 170 mm. C. s. brevipennis, p. 332. 

 II. Breast tinged with pale ochraceous cinnamon, pale cinnamon 

 rufous, or breast buffy white or white. 

 A. Under parts with numerous black spots, 

 a. Back cinnamon rufous or rufous. 



Black tail band narrow (9 to 16); tips of rectrices 

 partly or wholly rufous ; wing more than 190; inner web 

 of outer rectrix normally rufous with one black band. 



C. s. cinnamomina, p. 315. 



Tail band 18 to 22; wing less than 187 (175 to 185), 

 average 181; tail, 122 to 131, average 127; inner 

 web of outer rectrix normally black and white ; under 

 parts paler than peruviana; sides and flanks whitish. 



C. s. australis, p. 316. 



Tail band 17 to 22; wing less than 187 (175 to 185), 

 average 181; tail 129 to 138, average 134; under 

 parts usually darker than in australis; sides and more 

 or less of flanks buffy; inner web of outer rectrix 

 normally rufous with one black band. 



C. s. peruviana, p. 319. 



