THE BIKDS OF NEW JERSEY. 93 



167 Erismatura jamaicensis (Gmelin). 

 Ruddy Duck, Sleepy Duck. 



Adult male in spring. — Length, 14-16. Wing, 5.75-6. Above, bright chest- 

 nut ; top of head, black, extending down the back of the neck in a point ; sides 

 of face and chin, white; entire neck, chestnut; under parts, silvery white, with 

 gray bases to the feathers ; wing and tail, brownish-black. 



Female and male in winter. — -Above, minutely mottled black and white, with 

 a trace of chestnut here and there in male ; entire neck, gray ; top of head, 

 dusky ; face, white. 



Young male in first autumn. — Similar below, but upper surface blackish, 

 with coarser transverse bands of dull white and buff ; head, brownish on top, 

 and white face not clearly defined ; a dusky stripe runs from the bill to the 

 ear-coverts. 



A tolerably common migrant, more plentiful on fresh water. Oc- 

 curs at Princeton in small numbers, March to April and October 1st 

 to November 30th. 



169 Chen hyperborea (Pallas). 

 Snow Goose. 



Adults. — Length, 23-28. Wing, 14.50-17. Similar in all plumages to the 

 next ; differs only in size. 



Very rare transient or winter visitant. 



A pair were obtained many years ago by Mr. Jolm Cassin in the 

 Philadelphia market, said to have been taken in the vicinity, and one 

 was shot on the Delaware, above Chester, December, 1890, by Mr. W. 

 V. Wilbank.i 



169a Chen hyperborea nivalis (Forster). 

 Greater Snow Goose. 



Adults. — Length, 30-38. Wing, 17.35-17.50. Pure white, except the black 

 primaries, and a rusty stain often seen on the head ; bill, dull red, with a white 

 "nail ;" feet, dull red. 



Young in first winter. — Similar, but upper parts gray. 



' Stone, Birds of E. Pa. and N. J., p. 59. 



