244 



SYSTEMATIC SYNOPSIS. — PASSEBES — OSCINES 



streaked below on white ground, with reddish sides. (European.) i/iacus 4 



Banded crosswise, not s]Hil ted, behiw ; ujiper i>arts slate-colored. (Western.) nwvius 5 



Spotted below on white or tawny ground, or on both. 

 I'p2'cr parts not of uniform color. 



Upper jtarfs tawny, shading to olive on rump. (Wood Thrush, eastern.) mustelinus 6 



U[)per parts olive, shaiiing to rufous on rump. 



Of medium size. (Ifermit Thrush, eastern.) »(a7n/.s 10 



Of largest size. (Hermit Tlirush, Koclcy Mts.) auchihonl 9 



Of smallest size. (Hermit Thrush, Pacific coast.) mialascm 8 



Upper parts of uniform C(dor througlK^ut. 



Upper pans tawny ; spots below few, pale, chiefly confined to butt' jugulum : no bulf 



eye-ring (Tawny Thrush, eastern.) fltscescens 7 



Upper parts russet olive; under parts as before; no buff eye-ring. (Tawny Thrush, 



western.) saiicicola 7 



Upper parts russet olive; spots below numerous, inrading white breast; a butF eye- 

 ring (Western Olive-backed Thrush.) nstulatus 11 



Upper parts dark pure olive ; spots below as before ; a bufl' cyc-ring. (Eastern Olive- 

 backed Thrush.) swaitisoiit 13 



Upper parts dark pure olive; spots below as before ; no buff eye-ring (Eastern.) . . . a/(f/a' li' 



1. T. migrato'rius. (Lat. migraforiiif:, niignttdry; viigrator, a -waiiikTer. Figs. 3G, 58, 110.) 

 KOBIN. (J, in summer : Upper parts slate-eolor, with a sliatle <if elive. Head blaclc, the eye- 

 lids and a spnt before tlie eye white, and the throat streaked with wliite. QuiUg of the wings 

 dusky, edged with hoary ash, and witli the color of tlie back. Tail blackish, the outer 

 feather usually tipped with whiti'. Under parts, to the vent, including the under wing-coverts, 



' - ' chestnut. Under tail-coverts and tibiaj white, 



sliowiug more ov less plumbeous. Bill yellow, 

 often with a dusky tip. Mouth yellow. Eyes 

 dark brown. Feet blackish, the soles yellow- 

 •^-i^y .^^Jai^g^^lj^^Mpr ish. Length about 10.00 ; cxteut 16.00 ; wing 

 ^■^"■-^^^^^HHtHP^ 5.00-3.50 •" tail 4.00-i.50; bill 0.80; tarsus, or 

 _____™. middle toe and claw, 1.'25. 9j 'n summer: 



^^^^^SSP"^"' Similar, but the cobn's duller ; upper piarts 



^vasHH^ rather olivaceous-gray ; chestnut of the under 



parts paler, the fciithers skirted with gray or 

 "Fig. 116.- Eobin,nat. size. (Ad. nat. del. E. C.) „,hite ; head and tail less blackish ; throat with 

 more white. Bill much clouded with dusky. ^ 9 , in winter, and young : Similar to the adult 

 9 , but receding somewhat farther from the <J in summer by the duller colors, the paleness 

 ' and restriction of the chestnut, with its extensive skirting with white, lack of distinction of the 

 color of the head from that of the back, tendency of the white spot before the eye to run into 

 a superciliary streak, and dark color of most of the bill. Very young birds have the back 

 speckled, each feather being whitish centrally, with a dusky tip ; and the cinnamon of the 

 under parts is spotted with blackish. The greater diverts are tipped with white or rufous, 

 freciucntly persistent, as are als<i some similar marldngs on the lesser coverts. N. Am. at 

 large; an abundant and familiar bird, migratory, but breeding anywhere in its range. Nest 

 in trees, usually saddled on a horizontal bough, composed largely of mud; eggs 4-6, about 

 l.'S X 0.80, uniform greenish-blue, normally unspotted. 

 . 2. T. m. propin'quus ? (Lat. propinquus, neighboring ; as related to the last.) Allied 

 lioBiN. Quite like T. migratorius; averaging slightly larger; wing up to 5.00; tail U]i 

 to 4.70, not so blackish as that of T. migrntoyiits, the outer feather without white, or 

 merely a narrow edging. A scarcely distinguished race, of the Rocky j\lt. region and 

 (Westward. 

 3. T. confl'nis. (Lat. confinis, allied or related ; as to T. migratoriiis.) St. Luoas Robin. 

 Upper parts, including sides of head and neck, uniform grayish-asli, witli slight olive shade, 

 scarcely darker on the head; chin and throat white, streaked with ashy-brown ; breast, sides, 



