28 INDIAN DUCKS 



Subfamily PLECTKOPTERINzE. 



Kcji f(i Gcnirii. 



A. A large tleshy comb at the liase of the culmen in 



the male 1. Saicidiomis. 



B. No comb at the base of the culmen. 



(('. Bill in length at least equal to double the breadth 

 at base. 



((". Outline ot loreal feathering at the base of the 



bill with the convexity anteriorly .... 2. Asarconiis. 



h" . Outline of loreal feathering straight and inclined 



backwards 3. EJiodoncssa. 



b'. Bill not so long as double the breadth at base : 



head not crested 4. Nettoims. 



a". Head crested 5. ^x. 



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

 sportsmen : — 



A. Wing over 10 inches. 



a' . Head principally black and white. 



(/'. Comb at base of bill 1. Sarcidiornis S . 



h" . No comb at base of bill. 



ft'". Upper back black ; lower plumage nearly 



white Sarcidiornis S" . 



b'" . Upper back olive-brown ; lower plumage 



chestnut-brown 2. Asarcorms. 



h' . Head pink ; In-ight in J , dull in + 3. Bhodonessa. 



B. Wing under 9 inches. 



(■' . Primaries not edged with silver-grey 4. Netlopiis. 



d'. Primaries edged with silver-grey 5. j3Sx. 



As already enumerated, the distinguishing features of this sub- 

 family are : Rather long hind-toe, not lobed ; a neck shorter than the 



