760 SYSTEMATIC SYNOPSIS.— LONGIPENNES—GAVIjE. 



extending the whole length of the feather, very narrow at the base, widening as it runs toward 

 the tip, within 1^ inches of which it occupies the whole web ; the rest of the web white, sep- 

 arated from the black by a straight distinct line of division. The second, third, fourth, and 

 fifth primaries have the same general characteristics, but the white space rapidly gi'ows nar- 

 rower and shorter, and runs up further in the centre than along the edge of the web, so that for 

 a little way from its end it has a border of blackish along its outer margin ; other primaries 

 wholly pearl-blue, their inner webs margined with white. BiU. coral or orange-red, with a 

 slightly lighter tip ; feet blackish, their soles duU yellowish. Winter plumage : BUI less brightly 

 colored, its apex and tomia duU yellowish. Front white ; crown variegated with black and 

 white, the former color increasing on the occiput and nuchal crest, which latter, though shorter 

 than in summer, is almost or quite unmixed with white. ' This black extends forward on the 

 sides of the head to the eye, which it includes. (But frequently found breeding in this 

 imperfect condition of the black cap, which is much more usual than the complete black.) 

 Tail not pure white, but glossed over with the bluish of the mantle, which deepens toward 

 the tips of the feathers into dusky-plumbeous ; also considerably less forked, the lateral feathers 

 having little or nothing of a filamentous character. Young-of-the-year in August : Bill con- 

 siderably smaller and shorter than in the adult ; its tip less acute, and its angles and ridges less 

 sharply defined ; mostly reddish -yellow, but light yellowish at tip. Crown much as in the 

 adults in winter, but the occipital crest scarcely recognizable as such. Upper parts mostly 

 white ; but the pearl-gray of the adults appearing in irregular patches, and the whole back 

 marked with small, irregularly shaped, but well-defined spots of brown. On the tertials the 

 brown occupies nearly the whole of eacti leather, a narrow edge only remaining white. Lesser 

 wing-coverts dusky plumbeous. Primaries much as in the adults, but the line of demarcation 

 of the black and white wanting shai'pness of definition. Tail basally white, but soon becoming 

 plumbeous, then decidedly brownish, the extreme tips of the feathers again markedly white. 

 Otherwise as in the adults. Dimensions of the adults : length 18.00-20.00 ; extent 42.00- 



44.00; wing 14.00-15.00; 

 tail 6.00-8.00; the depth 

 of forking 3.00-4.00 ; biU, 

 along culmen, 2.50 to 2.75 ; 

 along commissure 3.75 ; its 

 height at base 0.70 ; its 

 width 0.50; gonys 1.00- 

 1.25 ; tibiae bare 0.90; tarsus 

 Fig. 514. — Elegant Tern, i nat. size. (From Sclater and Salvln.) 1.37- middle toe and claw 



1.40. Tropical and temperate America; Brazil and Peru to California and New England, 

 chiefiy coastwise; sometimes in the interior, as in Nevada. A fine species, second in size 

 only to S. caspia; linear measurement nearly as great as in that species, owing to elongation 

 of tail, but bulk much less. Breeds in great colonies along our Atlantic coast, dropping 2 

 eggs on the sand, 2.67 long, as much as in easpia, about 1.70 or less broad, narrower and 

 especially more pointed than those of caspia, rougher, yellowish-drab irregularly blotched 

 with dark umber and pale purplish. Chicks spotted boldly above with dusky. 

 195. S. (T.) e'legans. (Lat. elegans, choice. Pig. 514.) Elegant Tern. Princely Tern. 

 Similar to the last; smaller and differently proportioned ; bill as long, much slenderer ; tarsus if 

 anything longer than middle toe and claw ; mantle very pale ; under parts rosy iu high plumage. 

 Bill much longer than head, exceeding the tarsus, middle toe and claw together; much com- 

 pressed, very slender, scarcely \ as deep at base as long ; culmen quite straight to beyond nos- 

 trils, then slightly convex for the rest of its length ; commissure declinato-oonvex for nearly its 

 whole length ; mandibular rami very short, decidedly concave in outline, their angle of divergence 

 very acute. Gronys extremely long, exceeding the crura of the mandible, its outline straight. 



