82 



thing has occurred ; and when spots, as in this case, are placed just at the extreme points of the 

 feathers, it is obvious that slight attrition is sufficient to cause their disappearance. 



I have not thought it necessary to give a figure of this species, which cannot be regarded as 

 completely established until more examples have been received. There can be no difficulty in 

 recognizing it, from its close resemblance to B. fectus except in the characters above pointed 

 out. 



