INSESSORES. 163 



was distributed in similar numbers, intermingled with the 

 Arfamus sordidns, at about the ratio of one hundred pairs to 

 the square mile, the two species appearing to live and perform 

 the task of incubation in perfect harmony, both being fre- 

 quently observed on the same tree. In their dispositions, 

 however, and in many of their actions, they are somewhat 

 dissimilar, the A. snperciliosus being much more shy and 

 difficult of approach than the A. sordidns, which is at all 

 times very tame ; it also gives a preference to the topmost 

 branches of the highest trees, from which it sallies forth for 

 the capture of insects, and to which it again returns, in the 

 usual manner of the tribe. In every part where I have 

 observed it, it is strictly migratory, arriving in summer, and 

 departing northwards after the breeding-season. 



The nest is most difficult of detection, being generally 

 placed either in a fork of the branches or in a niche near the 

 bole of the tree, whence the bark has been partially stripped. 

 It is a round, very shallow, and frail structure, composed of 

 small twigs and lined with fibrous roots ; those I discovered 

 contained two eggs, but I had not sufficient opportunities 

 for ascertaining if this number was constant. Their ground- 

 colour is dull buffy white, spotted with umber-brown, forming 

 a zone near the larger end ; in some these spots are sparingly 

 sprinkled over the whole surface ; they have also the obscure 

 grey spotting like those of A. sordidns; the eggs are rather 

 more than eleven lines long by eight and a half lines broad. 



The male has the lores, space surrounding the eye, and the 

 ear-coverts deep black ; chin greyish black, passing into 

 blackish grey on the chest ; crown of the head greyish black ; 

 over each eye a pure white stripe commencing in a point, and 

 gradually becoming wider or spatulate in form as it proceeds 

 towards the occiput ; all the upper surface, wings, and tail 

 fuliginous grey, which is lightest on the rump and tail ; all 

 the tail-feathers tipped with white, except the outer web of 

 the lateral feather, which is grey ; under surface of the wing 



