130 PROCEEDINGS OF THE ACADEMY OF [1898. 



latitude 60° 20' N., a large ice floe was encountered upon which 

 these birds were very abundant ; in fact, one might easily have mis- 

 taken parts of the floe for a rookery. Not only were they abun- 

 dant on the floe itself, but each detached block of ice seemed to have 

 its crew of" Ice Ducks." Off St. Lawrence Island July 1st, murres 

 were far more abundant than any other species of bird. At East 

 Cape, Siberia, July 26th, these birds were quite common. They 

 were met with constantly on the American side as far north as Icy 

 Cape. From this point on, very few were seen ; none were observed 

 to the east of Point Barrow. This species is easily distinguished by 

 the strong heavy bill. Four specimens from Nutchuk, Alaska, have 

 the culmen measuring 2.26 ins., 2.1,2.2, respectively. 2 Hab., coasts 

 and islands of Bering sea and Aleutian chain, from Kadiak to Kamt- 

 schatka. Nelson found this bird abundant on Harold and Wran- 

 gel Islands. 



STERCORARIIDJE. 



36. Stercorarius pomarinus. Pomarine Jaeger. 



Four of this species were seen June 20th, longitude 164° 56', lati- 

 tude 50° 56' N. They were common at Port Clarence during the 

 latter part of July. A fine male was taken at Icy Cape July 31st. 

 At no time, however, were the birds in question so abundant as S. 

 longieaudus. Hab., northern portions of the northern hemisphere, 

 along sea coasts and larger inland waters, breeding far northward 

 in America, south in winter to California, New Jersey and the 

 Great Lakes. 



37. Stercorarius parasiticus. Parasitic Jaeger. 



Parasitic Jaegers were not abundant at any time. One solitary 

 individual was seen June 28th in latitude 60° 40' N. ; two more 

 were observed the following day. On July 1st three Parasitic Jae- 

 gers were seen off St. Lawrence Island One specimen was shot at 

 Port Clarence July 23d. These birds were fairly common at Icy 

 Cape. On August 3d at this place two fine adults, a male and 

 female in black plumage, were taken (see Nos. 3,564 and 3,566 L. 

 S. J. U.). Hab , northern portion of northern hemisphere, breed- 

 ing toward Arctic regions ; south in winter to New York, southern 

 California, and even the coast of Brazil. 



2 See Nos. 3,376, 3,422, 3,423, 3,424, L. S. J. U. Nutchuk, Alaska, July 

 11, 1896, A. W. Greely. 



