JOURNAL 



OF THE 



Natural Jptflrg ^otk% 



Vol. XI. BOMBAY. No. 2. 



INDIAN DUCKS AND THEIR ALLIES. 



By E. C. Stuakt Baker, F.Z.S. 



Paet II, with Plate II. 



(Continued from page 21 of this Vol.) 



Sub-Family Plectroptoriile. 



Key to the Genera — 



a A large fleshy comb at the base of the culmen 



in the male 1 Sarcidiornis. 



b No comb at the base of the culmen. 



a' Bill at least equal to double the depth at base. 

 a" Outline of the loreal feathering at the base 



of the bill with the convexity anteriorly. 2 Asarcoents. 

 b" Outline of loreal feathering straight and 



inclined backwards ... ... ... 3 Rhodonessa. 



V Bill not so long as doujble the depth at base. 4 Nettapus. 

 Another key is as follows, and this may prove simpler to sportsmen : — 



a Wing over 10". 



a' Head principally black and white. 



a" Comb at base of bill 1 Sarcidiornis. $ 



b" No comb at base of bill. 



a 3 Upper back black, lower plumage 



nearly white Sarcidiornis. 9 



b 3 Upper back olive-brown, lower plum- 

 age chestnut-brown ... ... 2 Asaecornis. 



V Head pink, bright in $ dull in 9 ... 3 Rhodonessa. 

 6 Wing under 7" 4 Nettapus. 



