20 
Psyche 
[March 
In the Old World, Fumed casta Pall, is widely distributed 
in England, on the European mainland, in Asia Minor and 
Algeria. The first specimens discovered in North America 
were found between Jamaica Pond and the Arnold Arbore- 
tum, in Boston, Massachusetts; and subsequent scouting 
showed this region to be near the center of an area of some 
50 square miles (Fig. 1), heavily infested at the center, and 
Fig. 1 . Map showing regions in Boston and vicinity infested 
with Fumea casta Pall. 
gradually diminishing in density toward the edges. Ap- 
proximately half of the area comprised those sections 
within the limits of the City of Boston known as Jamaica 
Plain, Forest Hills, Roslindale, West Roxbury, Hyde Park, 
Mattapan, the Arnold Arboretum, Stoney Brook Reserva- 
tion, and Franklin Park; the remaining 25 square miles 
were in Brookline, Newton Highlands, Dedham, Milton, and 
the Blue Hills Reservation. A second, and far removed, 
colony was later found by Dr. Jones in the Morris Arbore- 
