Key to the Species. 
A. Upper-surface mottled with brown and black : 
a\ Upper-surface splashed with white : 
a". Lateral under tail-coverts white .. .. P. fluminea, p. 212. 
h". Lateral under tail-coverts barred with black P. palustris, p. 214. 
h'. Upper-surface not splashed with white ; Distinc- 
tive white eyebrow . . . . . . . . P. leucophrys, p. 218. 
B. Upper- and under -surfaces uniform . . P. immaculata, p. 216. 
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