2 28 KEY TO THE WATER BIRDS OF FLORIDA. 



Subgenus FULVIGULA Stephens. 



(Male.) 



(Female.) 



AYTHYA MARILA NEARCTICA SAy//. 

 American Scaup Duck. 



Adult male: Head and neck and upper breast black showing greenish reflections; back 

 grayish white delicately lined with fine wavy lines of black, giving it a grayish appearance ; 

 speculum white ; under parts white, the lower belly showing grayish tinge. 



Length, 19; Wing, S.50 : Tarsus, 1.50; Bill, 2. 



Adult female : Patch at the base of the bill white or grayish white, rest of the head and 

 neck, breast and upper back brownish; belly white; speculum white. 



Length, 17.75 ; Wing, 8.25 ; Tarsus, 1.30; Bill, 1.60. 



Species ranges throughout North x\merica, breeding north of the United 

 States. It ranges in winter south to the Bahama Islands, and on the Atlan- 

 tic coast south to Florida, although it is not nearly as abundant in Southern 

 waters as A. 111. affiiiis, to which it is very closely allied. There are, ap- 



