KEY TO THE INDIAN DUCKS. 
EXPLANATIONS, 
Tarsus = the shank of the leg, from the (so-called) knee joint to the 
base of the hind toe. 
Femur -—S- = the thigh, or the part of the leg from the body to the knee, 
Lores § = the three-cornered portion of the face between the eye and 
the base of the bill. 
Nail == the triangularshaped hard patnied at the tip of the upper 
mandible, 
Culmen == the upper margin of ie upper mandible, 
Taileoverts == the soft feathers which overlie the quill feathers of the tail, . 
Primaies , = the outermost quill feathers of the oe in ducks 11 in 
tes number, 
Secondaries. = the remaining quill feathers of the wing, ~ 
Wing-coverts = the soft feathers of the wing from the shoulder to the quills, 
Speculum | == the pattern usually found on the outer secondaries formed by 
-_-yarious colours, 
Rectrices == the quill feathers of the tail. ] 
Lamelle = the tooth-like projections in the bill of the duck, 
Scupulars = — the Feathers of the outer back or shoulders. 
Compressed = Pressed laterally as if pinched at the sides, 
Depressed == Pressed vertically as if held above and below and flattened 
out. 
Spatulate | = Shovel or spoon-shaped. 
é = Male. 
Q == Female. 
ILLUSTRATIONS, 
ME 
A Duck’s hind toe not lobed asin the Swans, Geese, Cotton-teal, ete. 
r 
Hh Cae 
A narrowly lobed toe as in the Pintail, Gadwal, Teal, etc. 
A broad lobed toe as in the Pochards, Mergansers, etc. 
