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Andr? is right that a picture from the front would help.
P. chrysorrhoea should have a completely yellow face and the brown wing-band covering R2 comletely, and a silvery stripe on the pleura (which I can`t see) (-->if it has this silvery stripe it's more likely to be P. truncata.)
Without the silvery stripe we'll need a pic of the face to say if it's nigra of rufipes.