126 



Description. Sexes similar. Form more robust than that of 

 the S.Jiber. Secondaries and tertiaries rich brown, the primaries 

 of the same color, but darker ; some of the coverts of the pri- 

 maries brownish ; tail with the feathers below, brown, above hoarj, 

 the two middle feathers the most so, and the base of all white or 

 whitish. All the rest of the plumage snowj white. Bill horn 

 color, with the serrations of the upper mandible very distinctly 

 marked. Iris pale yellow ; naked skin around the bill, eyes, and 

 throat, black. Tarsi and feet, yellowish-green. Measurements : — 



Tachypetes aquilus. I found a few Man-of-war birds breeding 

 at the Biminis ; their nests were placed upon the mangroves, 

 amidst those of the brown pelican and Florida cormorant. As 

 these birds are much disturbed by the inhabitants, their breeding- 

 places will probably be given up in a few years. On the central 



* At the deepest part of the bill, there are no visible nostrils. 



