ON THE GENUS PTILOPUS. 177 



by love of birds, may explore completely these marvellous regions, and clear 

 up, by a series of patient notes and numerous specimens, our misty ideas as 

 to the causes of these variations, and may also inform us concerning- the 

 breeding, nestling-plumage, and other particulars. 



The specimens of P. speciosus figured are a male and female in my own 

 collection ; and the descriptions of P. helliis are also from a male and female 

 belonging to me. 



2d 2 



