220 
Psyche 
[December 
two parasites Inareolata punctoria and Lydella grisescens 
will be the first to become established and to prove beneficial 
on Long Island. In addition to the numbers of these two 
species liberated in 1933, as shown above, 1,229 individuals 
of I. punctoria and 5,916 of L. grisescens were colonized in 
the township of Southold, in the north fork, during the sum- 
mer of 1932. Except for these two species, no parasites of 
the European corn borer, however, had ever been liberated 
on Long Island previous to 1933. A parasite census here 
four or five years hence should supply interesting results 
and useful information. 
When the European corn borer invaded Long Island it 
seemed to have found ideal conditions in which to live and 
to thrive. Favorable weather conditions combined with the 
abundance of corn on the Island furnished an environment 
strongly in its favor. The absence of its natural parasites 
and diseases also aided its rapid increase. Paradoxical 
though it may seem, the farmers themselves unwittingly 
assisted its increase by failing to destroy the materials in 
which the borers hibernate. (New York State has not en- 
acted the “compulsory corn borer clean-up” law in force in 
some of the New England States) . The history of the Eur- 
opean corn borer on Long Island has been such as to make 
the invasion by this insect an important economic problem 
not only for Long Island but also for other areas along the 
Atlantic seaboard where conditions are similar, and some 
of these are already infested. 
