542 



MR. W. H. HUDSON ON PATAGONIAN BIRDS. [Apr. 16, 



This new species is of about the "same size as C. cyaneirostris, 

 but has a large portion of the bases of the remiges on their inner 

 web white, as in C. aterrimus. From C. aterrimus, however, it is 

 readily distinguishable by its smaller size, by the peculiar narrowed 

 remiges, and by the white spotting of the flank-feathers. This last 

 character is not found in any other species of the genus. 



Bill, foot, and under surface of left wing of Cnipolegus kudsoni. 



Mr. Hudson sends four male specimens of this new species, which 

 I propose to name after its energetic discoverer. It would be very 

 interesting to get the female also. — P. L. S.] 



This bird makes his appearance late in September in the close 

 thickets bordering on the Rio Negro ; he is usually seen perched on 

 the topmost twig of a bush watching for insects, after which he 

 darts with great swiftness. He has one most remarkable habit : 

 suddenly quitting his perch he glides two or three times close round 

 it, uttering at the same time a peculiar sharp note. It also fre- 

 quently utters a sharp, rapid chirping, but has no song. It is a 

 very lively little bird ; and when, flying, it displays the white bars 

 on its wings it has a strange and pretty appearance. 



11. Serpophaga, sp.* 



This little bird does not migrate, lives in pairs, and frequents 

 bushes, where it is never seen at rest, but hops incessantly from twig 



* This is the P/iylloscartcs flavocinereus of Burrneister, La-Plata Eeise, 

 ii. p 455. Mr. Hudson's skins agree with my specimen from Meudo. a 

 (Weisshawpt'). It is, however, most nearly allied to Stigmatura budytoides 

 (Lafr. et D'Orb.), Scl. et Salv. P. Z. S. 1866, p. 188 ; and I propose to place it in 

 the same genus, as Stigmatura flavocincrea. — P. L. S. 



