14 BIRDS OF EASTERN MASSACHUSETTS 



W. R. off -shore; frequent along shore; casual inland. Sept. 

 6 -Mar. 10. 



42. Glaucous Guil; Burgomaster Ldrus hyper- 

 boreus Gunnerus. Rare W. V. coastwise. Nov. 29 - April 

 23 (Jan. 7 - May 26, Ipswich). 



43. Iceland Gull Larus leucopterus Faber. Rare 

 W. V. coastwise. Nov. 4 - April 17. 



45. Kumlien's Gull Larus kumlieni Brewster. Rare 

 W. V. coastwise. Oct. 27 -Mar. 13. Plum Id., Swamp- 

 scott, Boston, Plymouth. 



47. Great Black-backed Gull ; " Saddle-back." 

 Larus marinus Linne". Common W. R. coastwise ; a few 

 pass the summer. Late Aug. - May 1 (summer). Common 

 along the coast and in adjacent inland waters. 



51. Herring Gull ; " Gray Gull." Larus argentd- 

 tus Pontoppidan. Abundant M. and W. R. coastwise; less 

 numerous in summer. A useful scavenger of the harbors 

 of the coast and adjacent inland waters. 



54. Ring-billed Gull Larus delawarensis Ord. Not 

 uncommon M. coastwise; casual inland. Spring; July 17 - 

 Oct. 30; probably in winter. 



58. laughing Gull Larus atricilla Linne. Rare V. 

 or M. in Essex Co. (a breeding colony in Maine); scarce 

 S. R. south of Cape Cod (Muskeget Id.) May 7- Oct. (Nov. 

 Eggs, June 7 - July 10. 



6O. Bonaparte's Gull Larus Philadelphia (Ord). 

 Common M. and rare W. R. coastwise; casual on inland 

 waters. Mar. 10- June 3; July 24 - Nov. 25; winter. 



*62. Sabine's Gull ; Fork- tailed Gull Xema sdbi- 

 ni (J. Sabine). Casual coastwise M. Aug. - Sept. 



63. Gull-billed Tern ; Marsh Tern Gelochelidon 

 nilotica (Linne). Accidental from South. One instance: 

 Ipswich, Sept. 



64. Caspian Tern Sterna cdspia Pallas. Rare spring 

 and not uncommon fall M. coastwise. Early May; Aug. 8 - 

 Sept. 26. 



65. Royal Tern Sterna maxima Boddaert. Acci- 

 dental V. coastwise from South. July; Ipswich, Chatham, 

 Nantucket. 



*67, Cabot's Tern Sterna sandvicensis acufldoida 

 (Cabot). Accidental from South. Aug., Oct. Chatham; 

 Monomoy Id. 



69. Forster's Tern Sterna forsteri Nuttall. Very 

 rare fall M. from West. Aug. -Oct. 2. 



