137 



KTINORHYNCHUS STREPERA. 



Kti. Mas. — Cinereus et albus ; speculo atro ; tectricibus castaueis. 

 Kti. Fern. — Brunnea, marginibus pennaram suturatioribus. 



GADWALL. 



Male, grey and white ; speculum velvet black ; primary coverts chesnut. 

 Fem. brown, with the margins of the feathers lighter. 



IN. IN. IN. 



Length 21 Bill If Tarsi li 



Male : head and neck brownish, marked with dots of grey brown ; upper part of the breast 

 and lower part of the neck grey brown, each feather marked with a lunule of white ; back the 

 same, thickly barred with white ; tertiaries grey, the edges light ; speculum black, anterior to which 

 there is a reddish chesnut patch formed by the greater primary coverts, posteriorly one of white ; 

 lower part and under tail coverts black ; quills and tail grey ; bill black ; legs fuscous. 



Fem. : with the speculum as in the male ; remainder of the plumage as in the female of the 

 common wild duck. 



Chauliodus strepera Gould, European Birds. 



Anas strepera Linn. Syst. 1. 200. 



Gmel. Syst. 1. 520. 



Lath. Ind. Orn. 2. 859. 



Ktinorhynchus strepera Nobis. (See preface.) 



Gadn-all Penn. Arct. Zool. 2. 575. 



Chipeau Buff. Ois. 9. 187, pi. 12. 



Trachea Linn. Trans, vol. 4, tab. J 3,fff. 8. 



A very widely distributed species. We have received specimens from India, Africa, and 

 America. It is also enumerated in the British lists, and is not uncommon in Holland, where it 

 breeds in marshes among rushes, laying eight or nine ashy green eggs. 



Tube of the trachea enlarged about one-third of its whole length from the lower extremity, 

 and again contracted above the inferior larynx. Inferior larynx with a projection on the left side 

 and before ; anteriorly very slightly acuminate. 



