354 TRANSACTIONS OF THE [1895 
At Hagerstown it was noted asa rare transient and ques- 
tioned as a summer resident (Small), while Dr. H. D. Mearns 
gives it as “a rare summer visitant” in Somerset County Pa., 
(Birds Pa., 269 and 284). 
Dendroica pensylvanica (659). Chestnut-sided Warbler. 
A common migrant from April 29 (93, Gray) to May 25 
(92, Resler), and from August 15 (’90, Pleasants) to Septem- 
ber 25 (’93, Gray). On October 18, ’93,a remarkably large num- 
ber of this species were observed. They, with other species, 
fairly swarmed in an 8-acre piece of woods; my note book 
says: “The ground was covered with Towhees and Snowbirds, 
the bushes were full of White-throats, Song Sparrows and Snow- 
birds, while the trees were filled with Black-throated Blue, 
Black-throated Green, and Chestnut-sided Warblers; Golden 
and Ruby-crowned Ringlets, Robins and Blue Jays,—evidently 
a first-class bird-wave.”’ 
At Washington they are recorded from “April 28 to May 
30 (91), and from August 10 (’89; 94, Figgins) to September 
29 (’89)” (Richmond). 
On July 4, 93 (Wholey), a pair were taken near the Blue 
Mountain House, and on July 24, ’93 (Gray), a pair with 
“worms”? in their bills were seen within 100 yards of High 
Rock, showing that they breed on the Blue Ridge. On Dan’s 
Mountain they were fairly common from June 5 to 14, ’95; 
on the 9th I collected a nest with 4 eggs about half incubated, 
Dendroica castanea (660). Bay-breasted Warbler. 
Migrant, not common ; specimens have been taken as follows: 
May 16 (’91, Blogg) at Franklintown, May 21 (93, Wholey) 
at Waverly, May 24 (’90, Pleasants) at Towson, and May 28 
(93, Wholey) at Waverly; September 20 (’93, Gray) at Cal- 
verton, September 21 (’93, Pleasants) at Towson, and Septem-. 
ber 28 (’89, Resler) at Back River. 
