Dr. P. L. Sclatev on Pipra deliciosa. 



177 



further remarkable for the very curious structure of its wings, 

 which merits a detailed description. The ten primaries are of 

 the ordinary formation of birds of this family, the first being 

 shorter than the second, third, and fourth, which are nearly 

 equal and longest, and of about the same length as the sixth. 



The first three secondaries are thick-stemmed, and curved towards 

 the body at a distance of about two-thirds of their length from 

 the base. The fourth and fifth show this structure to a greater 

 degree, with some corresponding alteration in the barbs on each 

 side, as may be seen by comparing fig. a, representing the upper 

 surface of the fifth secondary of the male bird, with fig. a', which 

 gives a similar view of that of the female. In the sixth and 

 seventh secondaries of the male the terminal half of the rachis is 

 thickened to an extraordinary degree, forming a solid horny lump. 



VOL. IV. N 



