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LARIDA — LESTRIDINA:: JAGERS. 735 
whitish ; each feather being dark-colored, with a spot of chestnut toward its extremity, which 
in turn fades into whitish aiong the shaft toward the tip of each feather. On the latero-nuchal 
region and across the throat the chestnut lightens into a decided reddish-yellow, the white 
being as a well-defined, narrow, longitudinal streak on each feather. The crown, post-ocular, 
and mental region have but little whitish. Inferiorly the plumage is of a blended fusco-rufous, 
lighter than on the dorsum, with a peculiar indefinite plumbeous shade. The wings and tail 
are blackish ; their shafts white, except toward the tips; the remiges and rectrices white for 
some distance from the bases. This white on the tail is concealed by the long tail-coverts, 
but appears on the outer primaries as a conspicuous spot. Bill and claws blackish-horn ; 
feet black. Bill from base to tip 2.10; to end of cere 1.20; gape 3.00; height at base 0.75; 
width a little less; gonys 0.50; wing 16.00; tail 6.00; tarsus 2.70; middle toe and claw 
3.10. Young-of-the-year: The size much less, bill weaker and slenderer ; cere illy developed; 
strize not apparent, and its ridges and angles all want sharpness of definition. Wiaings short and 
rounded, the quills having very different proportional length from those of the adults; the 2d 
being longest, the 3d next and but little shorter; the lst about equal to the 4th. The inner 
or longest secondaries reach, when the wing is folded, to within an inch or so of the tip of the 
longest primary. Central rectrices, if anything, a little shorter than the next. Colors 
generally as in the adult, but everywhere duller and more blended, having few or no white 
spots; the reddish spots dull, numerous, and large, especially along the edge of the forearm 
and on the least and lesser coverts. On the under parts the colors are lighter, duller, and still 
more blended than above. The prevailing tint is a light, dull rufous, most marked on the 
abdomen ; but there and elsewhere more or less obscured with an ashy or plumbeous hue. 
The primaries, secondaries, and tertials, together with the rectrices, are dull brownish-black ; 
their shafts yellowish-white, darker terminally. At the bases of the primaries there exists the 
ordinary large white space, but it is more restricted than in the adults, and so much hidden by 
the bastard quills that it is hardly apparent on the outside of the wing, though very conspic- 
uous on the inferior surface. Legs and feet parti-colored, —brownish-black, variegated with 
yellowish. Bill along culmen 1.75; along gape 2.75; height at base 0.50; length of gonys 
0.35 ; tarsus 2.60; middle toe and claw the same; wing 12.25; tail 5.75. N. Am., north- 
erly, rare or casual. ‘‘ California.” 
S. pomatorhi/nus. (Gr. ropa, mouatos, poma, pomatos, a flap, lid; pis, puds, hris, hrinos, 
nose.) POMATORHINE JAGER. Adults, breeding plumage: Bill shorter than the head, or ? 
the tarsus, about 24 times its own height at the base; width about the same as the height. 
Tail somewhat less than half the wing. Ist primary but little surpassing the 2d. Occiput 
subcrested. Feathers of the neck rigid and acuminate, their fibrille disconnected.  Tail- 
feathers, including the central, broad quite to their tips, which are truncated, the rhachis 
projecting as a small muero. The central pair project about 3 inches ; are broad to near the 
tip, where they form an angle of 45° with the rhachis: their fibrilla exceedingly long (23 
inches), while those of the lateral feathers are only 1}. Tail slightly graduated. Tibize bare 
for # of an inch, scutellate for 4 inch. Tarsi very rough; anteriorly covered with a single 
row of scutella, except toward the tibio-tarsal articulation, where these scutella gradually 
degenerate into small, irregular polygonal plates, with which the whole of the rest of the 
tarsus is reticulated. These plates largest on the sides of the tarsus externally ; on the heel- 
joint, and posterior aspect of the tarsus generally, they become raised into small conical pyr- 
amids, acutely pointed. ~The scutella of the anterior portion of the tarsus are continuous with 
the superior surface of the toes, while the polygonal reticulation occupies both surfaces of the 
webs, and the inferior surface of the toes. Hallux extremely short, its nail stout, conical at 
the base, acute, little curved. Anterior claws all very strong and sharp; inner most so; the 
middle expanded on its inferior edge, not serrated. Webs broad, full, unincised, their free 
margins a little convex. The “cere” has a straight, smooth, convex culmen; its inferior 
