10 BIRDS OF PENNSYLVANIA. 



hanna river in Lancaster county. Messrs. C. D. Wood and John Krider 

 had in their possession two or three of these birds, which, they stated, 

 had been captured in the neighborhood of Philadelphia. Prof. H. Jus- 

 tin Koddy, of Millersville State Normal School, records the capture of a 

 Black Guillemot in the late fall or winter in Perry county, Pa. 



SUBFAMILY ALLINJE. DOVEKIES. 



GENUS ALLE LINN. 

 Alle alle (LiNN.). 



Dovekie ; Sea Dove. 



DESCRIPTION. 



Adult, in winter : Bill very short and thick, upper mandible curved; upper 

 parts brownish-black, scapulars edged and streaked with white, and secondaries 

 tipped with same ; chin, throat, sides of neck and under plumage generally white ; 

 bill, black ; iris, dark-brown ; tarsi (in dried skin) brownish. Length about 8 

 inches ; extent about 15| inches. 



Habitat. Coasts and islands of the north Atlantic and eastern Arctic Oceans ; in 

 North America south in winter to New Jersey ; breeds in high northern latitudes. 



The Sea Dove or Little Auk, as this bird is sometimes called, very 

 rarely migrates in winter as far southward as the coast of New Jersey. 

 During the past ten years I have seen two specimens that have been 

 captured in winter on the Delaware river near Philadelphia. Both of 

 these birds were taken shortly after violent storms. In the fall of 1886 

 Prof. H. Justin Roddy, of Millersville, Pa., obtained one of these birds 

 in Perry county, Pennsylvania. 



NOTE. Cepphus mandtii (Mandt's Guillemot) and Uria lomvia (Briin- 

 nich's Murre), both of which were mentioned in the first edition of Birds 

 of Pennsylvania, have been omitted in this report, as I am not certain 

 that either have been taken in our state. 



ORDER LONGIPENNES. LONG-WINGED SWIMMERS. 



FAMILY STERCORARIID-ffi. SKUAS AND JAEGERS. 



THE JAEGERS. 



The Jaegers or Skua Gulls inhabit principally the sea-coasts ; they also irequent 

 the large inland waters, especially the great lakes. Two genera and four species are 

 recorded as belonging to the fauna of the United States. In Pennsylvania the Jae- 

 gers have been noted by various naturalists only as very rare andirregular visitants. 

 These hardy, bold and predacious birds retire mostly to the dreary arctic solitudes 

 to rear their young. During the winter season, or at other times when migrating, 

 they are generally found singly or in pairs, but when breeding, a well-known writer 

 says they congregate in large numbers and nest in tufts of grass, on rocks or even 

 on the bare ground ; the eggs, two or three in number, are described as being nearly 

 three inches long and a little less than two inches in width, and are dark-colored, 



