RIVER DUCKS. 101 



i^. Cheeks and under parts chestnut-rufous. 141. Cinnamon Teal ( 3 ad.), 

 c''. Cheeks finely streaked with blackish. 

 c'. Under parts whitish, sometimes washed with brownish, streaked or 



spotted with blackish 140. Blue-winged Teal 9 . 



c«. Under parts heavily washed with chestnut-rufous and mottled with 



black 141. Cinnamon Teal 9 . 



II Wing over 8-50. 

 A, Belly white or grayish white, not conspicuously streaked or spotted. 



a. Whole head shining dark green 132. Mallard ( $ ad.). 



b. Center of head white or whitish, a large streak behind the eye. 



137. Baldpate ( $ ad.). 



c. Throat white, crown green or grayish green, tips of primaries greenish. 



144. Wood Duck. 

 d Throat blackish, center of crown buffy, rest of head rufous. 



13(5. Widgeon ( $ ad.). 

 e. Throat and sides of head olive- brown, darker on the crown. 



143. Pintail ( 9 ad.). 

 /. Throat, crown, and sides of head more or less finely streaked with 

 blackish. 



y^. Wing-coverts with more or less chestnut .... 135. Gadwall. 

 g^. No chestnut in wing-coverts. 



g^. Axillars* and sides barred with black .... 143. Pintail 9. 

 ^3. Axillars white or speckled with black, sides plain brownish. 



137. Baldpate 9 . 

 g*. Axillars white, sides thickly spotted or barred with black. 



135. Gadwall 9 . 

 £. Under parts conspicuously mottled, spotted, or streaked, or feathers 

 margined with chestnut-rufous. 

 o. With white in wing-coverts. 



a^. Lesser wing-coverts ashy blue - . 142. Shoveler 9 . 



b\ Lesser wing-coverts brownish gray, bordered with white or tipped 

 with black. 



b^. Speculum t purple 132. Mallard 9 . 



Js. Speculum gray and white 135. Gadwall 9 . 



b. No white in wing-coverts. 



a. Throat fulvous or buffy without streaks . . . 134. Florida Duck. 



b. Throat finely streaked with black 133. Black Duck. 



C. Belly chestnut 142. Shoveler $ . 



132. Anas boschas Linn. Mallard (see Fig. 17, a). Ad. S .— 



Whole head and throat glossy greenish or bluish black; a white ring around 

 the neck ; breast rich chestnut ; belly grayish white, finely marked with wavy 

 black lines; under tail-coverts black ; upper back dark grayish brown ; rump 

 and upper tail-coverts black ; longer upper tail-coverts recurved ; speculum 

 rich purple, bordered at the base and tip by narrow bands of black and white. 

 Ad. 9 . — Top and sides of head streaked with fuscous and buffy ; back fuscous, 



* See Fig. 64. t A colored patch in the wing. 



