176 BIRDS OF OHIO. 
243 (647.) HELMINTHOPHILA PEREGRINA (Wils.). 36. 
Tennessee Warbler. 
Synonyms: Helminthophaga peregrina, Sylvia peregrina, Ver- 
mivora peregrina. 
Tennessee Swamp Warbler. 
Kirtland, Ohio Geol. Surv., 1838, 163, 182. 
This is probably the most numerous warbler of the shade 
trees and orchards during both spring and autumn migra- 
tions. It passes entirely across the state, none remaining to 
breed. In spring it literally swarms about our trees and 
lawns, but is unnoticed by the majority of people, because 
it is so small and because its song is so like that of the Chip- 
ping Sparrow, and some insects. In autumn it is more con- 
fined to the woods, but is not uncommon in orchards and 
shade trees. It is one of our best friends, gleaning every- 
where for the eggs, larve or the perfect insects which do so 
great damage to fruit. Yet I have known of fruit growers 
who made war upon them for eating off the buds! They 
are after the bug that eats the bud or the fruit. 
The Tennessee Warbler is among the later warblers to ar- 
rive, appearing about May 5, and remaining two weeks. 
It passes south again in September, leaving the state during 
the first week in October. 
244. (648a.) CoMPSOTHLYPIS AMERICANA USNEZ Brewst. 
37 (part). 
Northern Parula Warbler. 
Synonyms: Dendreca tigrina, Perissoglossa tigrina, Sylvia 
americana, Parus americanus, Compsothlypis america- 
na (part). 
Blue Yellow-backed Warbler, Parula Warbler. 
Kirtland, Ohio Geol. Surv., 1838, 163, 182. 
Judging only from the specimens in the Ohio State Uni- 
versity and Oberlin College museums, six in all, this form is 
pretty clearly a regular migrant across the state in spring, 
during the first two weeks of May. There appear to be no 
breeding specimens in collections. It is not common any- 
where, but is fairly numerous during favorable years for 
the spring migrations of the warblers. 
