1090 Repoet of State Geologist. 



in Illinois, south of latitude 39 degrees" (N. and E. of K". A. B., 1889. 

 p. 382). Mr. Walter Faxon says its song, as most often heard, "re- 

 sembles the syllables thur-ree, thur-ree, thur-ree. (Sometimes the repe- 

 tition was four times instead of three)." To this was sometimes added 

 a refrain; at others, the song was different. They also sing an aerial 

 song. Their habits, in some respects, are similar to those of the Max}-- 

 land Yellow-throat, but they are not so quick-motioned, and are to 

 be found at times more up in the bushes or even the low limbs of trees. 

 They pass south in August and September. Prof. W. W. Cooke says: 

 *'It has been found nesting in Illinois even south of latitude 39 de- 

 grees" (Bull. No. 2, Div. of Economic Ornithology. U. S. Dept. Aar.. 

 p. 258). 



^^=287. (681).'^Geothlypis trichas (Linn.). 



Maryland Yellow-throat. 



Head of Maryland Yellow-thi'oat, male. Natural size. 



Adult Male. — Above, plain olive-green; a black band, bordered be- 

 hind with grayish-white, from the ear coverts along the side of neck, 

 through the eye and across the forehead; no markings on wings or tail; 

 throat and breast, rich gamboge-yellow; belly, sides and flanks, dull 

 yellowish- white. Adult Female. — No black about head; below, less 

 yellow; sides, somewhat brownish. Immature Male. — With black 

 markings more or less restricted; young birds, resembling the females, 

 but browner above. 



Length, 4.40-1.65; wing, 1.90-2.20; tail, 1.85-2.20; bill, .38-.42: 

 tarsus, .71-.80. 



Eange. — Eastern North America, from Panama, eastern Mexico 

 and West Indies to Labrador and Ontario. Breeds from Georgia, 

 north. Winters from South America and Gulf States, south. 



Nest, in thicket, often near water, swamp, on or near ground, in 

 grass, sedge, reeds or bush; of leaves or grass, lined with grass and 

 horsehair. JSggs, 4-5, raxely 3 or 6; white or creamj'-white, variously 

 speckled, spotted and sometimes lined with russet, burnt umber or 



