ere) The Ornithology of Chester County 
near Whiteland station. I flushed five young from 
nest at Berwyn on June 3, 1896, and have observed 
fledgings almost every season (Chapman’s Warblers 
OL NG AL 42). 
Berwyn: 
Arrival—Apr. 17 (1900)—May 6 (1893-6) ; 
ave. 23 yrs. May 1. 
Bulk arrival—Apr. 29 (1914)—May 13 (1899- 
1900) ; ave. 16 yrs. May 5. 
Bulk departure—Sept. 13 (1916)—Sept. 28 
(1913); ave. 2 yrs. Sept. 20. 
Last seen—Sept. 18 (1888)—Oct. 7 (1895) ; 
ave. 6 yrs. Sept. 27. 
185. Protonotaria citra Prothonotary Warbler. 
Straggler. Michener and Warren give it as an ex- 
tremely rare summer resident. Dr. Warren has 
taken two specimens, one in midsummer, the other 
in May (Bds. Pa., 1890, 274). 
186. Helmitheros vermivorus Worm-eating 
Warbler. Common summer resident, rather abund- 
ant in the second growth timber of the Octoraro, 
Brandywine and Chester Valley hills. The first 
authentic description of the nest and eggs was pub- 
lished by T. H. Jackson (Am. Nat., 3, 556) from 
the type set of five taken near West Chester, June 
6, 1869, and it has been found breeding the past 
thirty years with increasing frequency by Jackson, 
Ladd, Burns and others (Cf. Rhoads, B. N. O. C., 
vil, 55; Jackson, Orn. and: ‘Ool}; x;''176;)) x4, 156; 
Ladd, Ibid., xii, 110, and 149; Norris, Ibid., xv, 
117;\ Norris, Jr) Nid.) 3, 1655 Burns, Bd. Lore, 
vii, 137; Chapman’s Wazblers N. A., 50). Nidifi- 
shen 
