890 



APPENDIX. 



737 his. Add: CBdemia fusca. European Scoter. The true scoter of Europe and 

 Asia (of which our velvet scoter may be a recognizable variety, as long ago pointed out by 

 Cassin and Bonaparte) has occurred in Greenland and Alaska as a straggler from the Old 

 World, and may therefore take place in our list. It is distinguished from the American 

 0. f. velvetina by a somewhat different outline of the feathers upon the base of the upper 

 mandible, leaving the length of the culmen greater than the lateral length of the bill from 

 the loral feathers along the side to the tip ; and by a black stripe in the red of the bill. 



738. CBdemia fusca velvetina. 165. Oidemia deglandi. 



739. perspicillata. 166. perspicillata. 



740. perspicillata trowbridgii ? 000. [Not admitted in the List.] 



741. Erismatura rubida. 167. Brismatura rubida. 



742. Nomonyx dominica. 



743. Mergus merganser.^ 



744. serrator. 



745. cucuUatus. 



746. Sola bassana. 



747. leucogastra. 



747 his. Add: Sula cyanops. Blue-faced Booby. Adult ^J: White; greater 

 wing-coverts, bastard quills, primaries and their coverts, dusky brown ; tail-feathers the 

 same, the middle pair mostly whitish and the others whitish at the bases; face and gular sac 

 blue, drying blackish; feet light red. Young: Head, neck, and upper parts dark grayish- 

 brown ; lower parts from the neck white ; middle of back and upper part of rump streaked 

 with white, flanks with gray. Wing 14.50; tail 7.75; bill along culmen 3.50, its depth at 

 base 1.25; tarsus 1.76; middle toe 2.25. A species of wide distribution in warm seas, in- 

 habiting the West Indies and occasionally occurring in southern Florida. It should have 

 been admitted to the second edition of the Key. 



f 116. Sula piscator. 



747 ter. Add: Sula piscator. Red-footed Booby. Adult J $: White; head and 

 neck tinged with buff ; wing-feathers, primary coverts, and greater secondary coverts slate-gray ; 

 shafts of tail-feathers pale yellow. Feet coral-red ; iris brown; gular sac black; bare space 



' As pointed out by Mr. CaBSln In 185S, the American Bheldrake may be recognized, In comparlBon with the 

 European, by the black bar which partly divides the white area on the wing, and some average difference In the 

 bill, which is shorter than that of the true M. merganser. (Pr. Phila. Acad. 1853, p. 187.) 



