44 NORTH AMERICAN BIRDS. 



and tail ; lower parts exquisitely delicate pale 

 peach-blossom 2>ink, fading into pure white in 

 dried skins ; entire top of head, with nape, uni- 

 form deep black ; bill black, tinged at base (in 

 life) with reddish ; feet bright red in life. 

 Winter adult : Similar, but forehead and anterior 

 part of crown white, the latter tinged with 

 grayish and indistinctly streaked with blackish. 

 Young : Pilcum and nape pale huffy grayish, 

 finely mottled or sjirinkled with darker, and 

 streaked, especiallj- on crown, with dusky ; or- 

 bital and auricular regions dusky blackish; 

 remainder of head, and entire lower parts, white, 

 the nape and sometimes side of breast finely 

 mottled with buffy gray ; pale pearl-graj' of 

 back and scapulai's overlaid by pale buff, irregu- 

 larly mottled with dusky, each feather with a 

 submarginal dusky U-shaped mark; bill brown- 

 ish dusky; feet dusk}- (in dried skins). Length 

 14.00-17.00, wing 9.25-9.75, tail 7.25-7.75 (forked 

 for 3.50-1.50). culmen 1.50, depth of bill at base 

 .35, tarsus .85, middle toe .75. Eggs 2-4, 1.G6 X 

 1.21, similar to those of S. paradiscca, but ground- 

 color averaging lighter and markings smaller. 

 Ilab. Atlantic coast of United States; West 

 Indies, and various parts of Old AVorld. 



72. S. dougalli Montao. Roseate Tern. 

 Top of head black, with a broad white patch on forehead, ex- 

 tending backward on each side of crown to above ej-es; a 

 black stripe across lores. 



Summer adult: Above deep plumbeous-gray, beneath 

 paler, more lavender-gray ; tips of secondaries, upj)er 

 and lower tail-coverts, tail, sides of head, chin, under 

 wing coverts and axillars pure white ; bill and feet 

 entirely deep black. Winter adult, \xnkr\o\vx\. Young: 

 Forehead, lores, crown, and entire nape, smoky gray- 

 ish brown, deepening on occiput into dark sooty, this 

 color extending laterally nearly or quite to cj'c ; the 

 smoke-color of nape extending laterallj' over side of 

 neck and breast, or sometimes even tingeing the jugu- 

 lum and fore-neck; back, scapulars, inner wing-coverts, 

 and tertials dull slate-blackish, broadly and sharply 

 bordered tcrminallj' with yellowish ochraceous; upper 

 rump dark brownish slate, feathers narrowly tij^ped 

 with pale fulvous, this preceded by a dusky subter- 



