August, 1889.] 



AKD OOLOGIST. 



115 



139. Lanius borealis (Vieill.). Northern 

 Shrike. Winter resident; tolerably common. 

 Arrives by the first week in December, and 

 remains until the second week in March. 



140. Vireo olivacevs (Linn.). Red-eyed 

 Vireo. Summer resident; common. Arrives 

 first week in May. Nidificates by the last 

 week of that month; eggs, three or four. De- 

 parts last week in September. 



141. Vireo gilvus (VieiW.). Warbling Vireo. 

 Summer resident; common. Arrives first 

 week in May. Nidification commences not 

 later than the 2.5th; eggs, three or four. De- 

 parts last week in September. 



142. Vireo Jlamfrons (Vieill.). Yellow- 

 throated Vireo. Summer resident; tolerably 

 common. Arrives 1st of May. Nidification 

 takes place by the 25th of that month; eggs, 

 three or four. Departs last week in September. 



143. Vireo solitarius (Wils.). Blue-headed 

 Vireo. Transient visitant; rare. I took one 

 of this species near Coatesville, this county, 

 May 20, 1888, which is the only one I have 

 seen. 



144. Vireo noveboracensis (Gmel.). White- 

 eyed Vireo. Summer resident; common. 

 Arrives first week in May. Nidification com- 

 mences by .June 1st; eggs, three or four. De- 

 parts first week in October. 



145. Mniotilta varia (Linn.). Black and 

 White Wai'bler. Summer resident; tolerably 

 common. Plentiful during migrations. Ar- 

 rives first week in May. Nidificates by the 

 first week in June; eggs, four or five. Departs 

 first week in September. 



146. Protonotaria citrea (Bodd.). Prothon- 

 otary Warbler. Accidental visitant from the 

 South; have never taken this species but once. 



147. Helmitheru,sveri)dvorus (Gmel.). Worm- 

 eating Warbler. Summer resident; tolerably 

 common. Arrives first week in May. Nidifi- 

 cation commences by the 28th of that month. 

 I have found this species more plentiful among 

 the thickets and heavy undergrowth, which 

 covers the hills on the eastern banks of the 

 Octoraro creek, than elsewhere. Eggs, four 

 to five. Departs first week in October. 



148. Helminthophila j^inus (Linn.). Blue- 

 winged Warbler. Summer resident; tolerably 

 common. Arrives second week in May. Nidi- 

 fication begins first week in June. The nest is 

 always placed on the ground, at the base of 

 some small bush in open woods or clearings. 

 Eggs, four or five; departs by the 15th of 

 October. 



149. Helminthophila chryaoptera (Linn.). 

 Golden-winged Warbler. Summer resident; 



rare; in migration common. Arrives last 

 week in April. Nidificates by the last week in 

 May; the nest is generally placed in a tussock, 

 in some low swampy land, which is mostly 

 covered by alders. Eggs, four. Departs first 

 week in October. 



150. Helminthophila rvficapilla (Wils.). 

 Nashville Warbler. Summer resident; rare; 

 in spring and fall tolerably common. Arrives 

 first week in May. Found nest June 10, 1886, 

 with four young. It was placed on the ground 

 at the base of a large grape-vine, and was 

 composed of leaves and lined with horse-hair. 

 Departs by the last week in September. 



151. HelminthopJiila peregrina (Wils.). Ten 

 nessee Warbler. Transient visitant; tolerably 

 common. Arrives last week in April, and 

 again by the third week in September. 



152. (Jompmthlypin americana (Linn.). Pa- 

 rula Warbler. Summer resident; tolerably 

 common; in migration common. Arrives sec- 

 ond week in May. Nidificates first week in 

 June; eggs, four to five. Departs first week 

 in October. 



153. Dendroica oestiva (Gmel.). Yellow War- 

 bler. Summer resident; common. Arrives 

 first week in May. Nidification takes place by 

 the 25th of that month; eggs, three to five; 

 sometimes they rear two broods in a season. 

 Departs by September 15. 



154. Dendroica aerulescens (Gmel.). Black- 

 throated Blue Warblei". Transient visitant; 

 common; arriving by the lOtli of May, and 

 remains for eight or ten days, when it leaves to 

 reappear second week in September. 



155. Dendroica coronata (Linn.). Myrtle 

 Warbler. Transient visitant; common. Ar- 

 rives first week in April, and remains for two 

 or three weeks; reappears first week in October. 

 I have met with individuals here during mild 

 winters; usually they depart by the last of 

 November. 



156. Dendroica maculosa (Gmel.). Mag- 

 nolia Warbler. Transient visitant; tolerably 

 common. Arrives by the 10th of May, and 

 again first week in September. 



157. Dendroica ceeridea (Wils.). Cerulean 

 Warbler. Transient visitant; tolerably com- 

 mon. Arrives by the lOtli of May, and again 

 by the second week in September. 



158. Dendroica pennsylvanica (Linn.). 

 Chestnut-sided Warbler. Transient visitant; 

 common. Arrives first week in May, and 

 again by the first week in September. 



159. Dendroica caatanea (Wils.). Bay- 

 breasted Warbler. Transient visitant; toler- 

 ably common. Arrives last week in April, 



