M. F. Pollen un the Genus Oxynotus, 277 



jare white, changing on the upper parts of the breast into dirty 

 white mixed with grey, which extends over the belly. The pri- 

 maries are black, with the basal half or more of the inner webs 

 white, so as to form a concealed white bar, the fourth and fifth 

 being also externally edged, and, as well as the secondaries, 

 tipped with white. The rectrices are black, edged above with 

 grey, and broadly tipped wiih white. The under tail-coverts 

 are white. Bill black ; legs lead-colour. 



The males of the Reunion species have the upper part of the 

 head, back, and rump of a clear bluish-grey. The chin is white, 

 changing on the throat into bluish-grey, which extends over the 

 breast. The primaries and secondaries are much as in the Mau- 

 ritian species, but the white edgings and tips less conspicuous. 

 The rectrices are black, broadly tipped with white. The belly 

 and under tail-coverts are white. Bill brownish black ; legs 

 dark lead-colour. 



But it is in the plumage of the other sex that the greatest 

 diversity is to be noticed. The adult females of the Mauritian 

 species have the upper part of the head dark olive-brown, with 

 a yellowish line over the eye ; the lores grey ; the cheeks 

 yellowish-white, striped with dark brown. Upper parts of the 

 neck, back, and rump dark rufous-brown. Chin rufous-white, 

 streaked with brown, and passing into bright ferruginous, which 

 extends to the vent ; the tibial feathers slightly barred with 

 dark brown. R-emiges and rectrices dull brown, edged with 

 ferruginous, the latter broadly tipped with dull ferruginous- 

 white. Bill brownish-black ; legs dirty lead-colour. 



In the Reunion species, on the other hand, the adult females 

 have the upper parts of the head, back, and rump dark olive- 

 brown, tinged with ferruginous on the latter. A whitish line 

 over the eye; the lores and cheeks bluish-white, streaked with 

 dark grey. Chin bluish- white, passing into white slightly 

 tinged with ochraceous, which extends to the vent, and is thickly 

 barred with dark brown on the sides of the neck, the breast, 

 belly, and tibise. Primaries dull brown, nai'rowly edged with 

 fulvous-white ; secondaries the same, but more broadly edged 

 and tipped with fulvous-white ; tertials edged with light ferru- 



