398 



Ge7ieral Notes. [Ortober 



Helminthophila peregrina. Tennessee Warulrr. — Occurs regularly 

 in the fall, and occasionally in the spring, having been quite common 

 this last season from May 9 to May 19. 



Compsothlypis americana. Parula Warbler. — In Butler and Arm- 

 strong Counties I found this species to be a common breeder. I did not 

 actually find a nest, but saw a female in the act of gathering nesting ma- 

 terial. In Beaver County I have found it a tolerably connnon spring mig- 

 rant, and have lately (June 2. 1S91) taken a specimen which was doubtless 

 nesting at the time. 



Dendroica tigrina. Cape May Warhler. — Transient visitant; rajre ; 

 three specimens have come under my observation, bearing dates respec- 

 tively of Sept. 14, 1889, Sept. 24, 1889, and May 13, 1891. 



Dendroica caerulescens. Black-throated Blue Wauiu.er. — Mas been 

 taken as early in the fall as August 28 (18S9). 



Dendroica maculosa. Black-and-Yellow Wari^ler. — Reference to 

 the nesting of this species has alreadv been made in a former number of 

 'The Auk' (Vol. VIII, No. i, p. 116). 



Dendroica caerulea. Cerulean WAiiBLER. — For an account of the 

 Cerulean Warbler see 'The Auk' Vol. ^'III, No. 2, p. 23S. 



Dendroica pensylvanica. Chestnut-sided Warhler. — An abundant 

 migrant in Beaver County, spring and fall. I have taken and seen imma- 

 ture birds in August (August iS, 1888, and August 24. 1889), which would 

 seem to indicate that it breeds a little farther north. In Butler and Arm- 

 strong Counties, however, the case is very different ; there, every patch 

 of hazel thicket has its pair of Chestnut-sided Warblers, or, if extensive, 

 its several pairs, the gav and sprightly male ever prominent on its out- 

 skirts or on some shrub in its midst, constantly uttering his short but sweetlv 

 modulated song. Notwithstanding this clue, their nests are difficult to 

 find; after many vain searches I at last succeeded in finding one (June 3, 

 1889) containing four highly incubated eggs. 



Dendroica castanea. Bay-breasted Warbler. — Rare migrawt, esjiec- 

 iallv so in the spring. 



Dendroica blackburnise. Blackburnian Warbler. — Common migrant 

 in Beaver County. In Butler County I saw a single male June 4, 1SS9; 

 tiiis indicates that they breed there. 



Dendroica virens. Black-throated Green Warbler. — A common 

 migrant in Beaver County; in Armstrong and Butler Counties a common 

 summer resident, nesting in hemlock and pine forests, where the peculiar 

 notes of the male are constantly heard. 



Depdroica discolor. Prairie Warbler. — Transient visitant; lare; 

 two individuals noted in the fall of 1S90. 



Geothlypis formosa. Kentucky Warbler. — A rare summer resident; 

 three seen August 5, 1S88; a pair seen at same place Juna 24, 1889. Also 

 one seen in fall migration September 13, 1S88. 



Geothlypis Philadelphia. Mourning Warbler. — See note in 'The Auk' 

 Vol. Vlll, No. 2, p. 240. 



Icteria virens. Yellow-breasted Chat.^ — Common summer residewt 

 in Beaver County; not noticed in Butler and Armstrong Counties. 



