BIRDS OF EASTERN MASSACHUSETTS. 157 



Common at Ipswich in autumn. Abundant on the south 

 shore during the breeding-season. Breeds on Muskegat 

 Island abundantly ; generally building a nest of sticks in a 

 hollow among the Sand-hills. 



277. Sterna Antillarum, COUES. Least Tern, 

 "Jack-knife Gull." Not as common as the preceding. 

 Breeds later, not until July ; lays from one to four eggs. 

 Have found a few breeding at Ipswich. Also breeds on 

 Nantucket. 



Forster's Tern (Sterna Forsterii, Nutt). This species 

 appears to differ from hirundo in having the outer web of 

 the outer tail-feather white. I have never met with it. 



278. Hydrochelidon fissipes, GRAY. Short-tailed 

 Tern. Bare in autumn. Mr. J. F. Le Baron shot a speci- 

 men at Ipswich, August 11, and saw another. 



279. Haliplana fuliginosa, WAGL. Sooty Tern. 

 Mr. Samuels says he "found it breeding on Muskegat 

 Island." I think it occurs rarely. 



PROCELLARIDJS, THE PETRELS. 



280. Puffinus major, FABER. Greater Shearwater. 

 Not uncommon off the coast in winter. 



281. Fuffinus Anglorum, TEMM. Mantis Shear- 

 water. Rare off the coast in winter. 



282. Puffinus fuliginosus, STRICKL. Sooty Shear- 

 water. Common off the coast during spring, autumn, and 

 winter. 



283. Procellaria pelagica, LINN. Stormy Petrel. 

 Rare off the coast. 



284. Oceanites oceanica, COUES. Wilson's Petrel. 

 Common off the coast. 



285. Cymochorea leucorrhoa, COUES. Leach's 

 Petrel. Abundant off the coast. This and the two pre- 



