1925 ] 
Some Butterflies from Eastern Massachusetts 293 
SOME UNUSUAL AND INTERESTING BUTTERFLIES 
FROM EASTERN MASSACHUSETTS. 
By Austin H. Clark. 
Smithsonian Institution, Washington, D. C. 
During the months of July and August in 1923, 1924 and 
1925 such time as could be spared from my regular duties was 
occupied in a study of the butterflies in eastern Massachusetts. 
The territory covered in 1923 extended from Needham to Wal- 
tham, Weston and Lincoln with headquarters at Newtonville. 
In 1924 and 1925 the region studied was from Manchester to 
Ipswich, especially Essex, with headquarters at Manchester. 
On all of my excursions I was accompanied by my two sons, 
Austin B. J. Clark and Hugh U. Clark who are responsible for 
most of the captures recorded below. 
In 1923 our efforts were mainly directed toward determining 
the status of Feniseca tarquinius in the region covered. We 
found it to be common, generally distributed, and readily secured 
in quantities after one has learned to recognize its characteristic 
haunts. 
In 1924 and 1925 we concentrated our attention mainly on 
three localities in Essex which are natural butterfly traps. The 
first was an enormous patch of milkweed ( Asclepias syriaca) by 
the roadside on Conomo street nearly opposite the farm house 
on Mr. S. D. Warren’s estate. The next was a bog of considerable 
size wholly surrounded by wooded hills dff the same street half a 
mile or so further on. Here numerous scattered examples of the 
red milkweed ( Asclepias incarnatum) and later an abundant 
growth of Cephalanthus and subsequently patches of Joe Pye 
weed ( Eupatorium purpureum) served as bait for the multitudes 
of argynnids and other butterflies that filtered in through the 
woods. The third was a dry hillside on the north side of Apple 
street near Bixby’s camps sloping downward toward the west 
to a marshy spot protected from the wind by a fairly steep hill 
just beyond. 
The summer of 1923 in eastern Massachusetts was note- 
worthy for the great abundance of Satyr odes canthus which in 
