22 INDIAN DUCKS. 



Subfamily PLECTROPTEl^IN^. 



Kejl to (jenora. 



a. A large fleshy comb at the base of the cuhnen in the 



jnale I- ''^nrci'.Jiornia. 



h. Xo comb at the base of the cuhnen. 



a . Bill at least equal to double the length at base. 



a". Outline of the loreal feathering at the base of the 



bill with the convexity anteriorly "2. Amrrornh. 



h". Outline of loreal feathering straight and inclined 



backwards :^'. Modonemi. 



h'. Bill not so long as double the length at base ; head 



not crested 4. Ndtapus. 



n" . Head crested ^i- -^•^'• 



Another kc}' is as follows, and this may ])rove simpler to sportsmen : — 



(/. "Wing over 10 inches, 



a. Head principally black and \\hite. 



a". Comb at base of bill 1. Snrcvlinrnis: S. 



I'". Xo comb at base of bill. 



a'". Upper back black ; lower plumage nearly white . ,S(irei(liorinx J. 

 />'". Upper back olive-brown; lower plumage chest- 

 nut-brown 2. Asnrcornift. 



I'. Head pink ; bright in c? , dull in $ >! Rhodnties-^a. 



h. Wing under 9 inches. 



c . Primaries not edged silver-grey 4. Nettajins. 



(T . Primaries edged with silver-grey 5. yEx. 



As already enumerated, the (Hstinguisliing features of this subfamily 

 are : rather long hind toe, not lobed ; a neck shorter than the body; and 

 with, es])ecially in the male, more or less glossy upper plumage com1)ined 

 with comparatively long tail-feathers. 



In India five genera are represented, although each l)y a single species 

 only. Indeed two of the five genera })0ssess but one species, and are 

 ])eculiar to India and adjacent countries, these two being Amreornis and 

 Jihodonessa, 



