285 
1868. 
Circus hudsonins. . 
Middlesex County, Mass, 
Mar, 26, 
Saw one as white ais a Gull, v/ith the tip of his 
wings black. 
Oct. 31. 
One in the v/hite plumage. 
1869. 
Mar* 14, 
One seen at Concord. 
A pr. 8. 
Saw several at Concord. 
1870. 
Mar 23, 
A pair beating about over an open meadow followed by 
several Crov/s, which, however, they did not seem to re¬ 
gard v/ith much concern. 
1871. 
Mar, 1. 
A fine specimen in the white pl-Limage flying over an 
open stretch of ©pen upland. 
“ 23. 
Abundant on Concord River, Saw two this morning 
performing singular evolutions. Rising to the height 
of perhaps fifty or a hundred foot then would suddenly 
drop v;ith nearly closed v/ings and when within a few foot 
!i of the earth glide up again in a graceful curve, uttering 
a harsh rollong hec-hec-hoc-hec-hoc-hoc, This was re¬ 
peated dozens of times over nearly the same place, the 
bird occasionally perching for a few moments as if for 
rest, then beginning again. I also heard one of them 
utter several times a shrill wheo, verv like the scream 
of B.lineatus. 
Apr. 3, 
Abundant at Concord. 
1872. 
Apr, 3. 
Numbers migrating at Concord. 
1874. 
Oct, 13, 
On the Assabet River, Concord, one hovered for a 
mom.ent over some Sparrows in a thicket within twenty 
yards of us, 
1875. 
May 21. 
A male evidently had a mate sitting in a certain 
portion of Rock Meadow. At intervals of perhaps an 
hour he would approach the spot, flying hundreds of feet 
ab ove the meadov/, and begin tsooping down like a Night- 
hav/k, at each stoop uttering a rather feeble kep-kep-keo. 
While performing these evolutions his motions were most 
graceful, bouyant, and airy; at each descent he ap¬ 
proached nearer the earth, and I finally co”.ld just 
catch sight of him as he rose above the bushes and plun¬ 
ged again, probably alighting on or near the nest. 
