358 



LARIDjE : JAEGERS, GULLS, TERNS, ETC. 



0.75 of an inch to a mere point; tarsus, i.oo; middle toe and 

 claw, 1. 1 2. 



Another of the stragglers which occasionally visit 

 us from southern waters. It was included among our 

 birds by Coues in 1868, as of undoubted occurrence on 

 the coast. As Dr. Brewer remarks, "the capture of 

 two specimens by Mr. Vickary at Chatham, Cape Cod," 

 in August, 1865, first gave it a right to take its place 



Fig. 77. — Bill of Sandwich Tern. N.it. size. 



among the rare and accidental birds that visit our coast 

 (Pr. Bost. Soc, xvii, 1875, p. 449). This Chatham record 

 was made by Allen (Am. Nat., iii, 1870, p. 644). 



COMMON TERN ; WILSON'S TERN ; SEA 

 SWALLOW. 



Sterna hirundo Atict. 



Chars. Bill red, blackening on the terminal third, the very point 

 usually light ; feet coral-red. Mantle pearly grayish-blue ; pri- 

 mary shafts white, except at the end ; below white, washed with 

 pale pearly plumbeous, blanching on throat and lower belly ; cap 



