- 794 - 
UNIVERSITY OF FLORIDA 
3 1262 09241 5560 
That Macro cent rus gifuensi s shows promise of "becoming one of the most 
valuable parasites in the multiple-generation area is shown by its performance 
in southeastern Massachusetts and, as demonstrated by the 1940 surveys, by its 
ability to become established under the varied environments of dispersion 
colonization. 
Chelonus annulipes has not been found in abundance at any point, probabl, 
because of its apparent highly critical environmental requirements but, in view 
of its continued maintenance over a long period in southeastern Massachusetts, 
it seems probable that by close colonization, conditions favorable for its in- 
crease may be found in restricted ecological islands in the multiple- generatio. 
cl I*© cl* 
Cremastus flavoorbitalis was taken at one point in Bhode Island in 1940, 
but observations do not offer promise of this parasite becoming of economic 
value in the regions where it has been colonized to date. 
Observations in previous years have shown that Phaeogenes nigridens 
Wesm. is present in eastern Massachusetts. Eo surveys were made to check 
its current status, but, in view of the slow increase and spread shown by 
previous surveys, it is probably not of economic importance at any point. 
Data available up to the close of the 1940 active season, show that 
throughout the Lake States no parasites of the European corn borer are of 
economic importance except in a narrow strip bordering marshland along, the 
southwestern shore of Lake Erie where Lydella stabulans var, gri sescens is 
present in high concentrations. In the Eastern States three parasites, L. 
stabulans var. grisescens. Iflareolpta punctoria . and Macro cent rus gifuensis . 
are present in considerable abundance over the greater part of the more 
heavily infested areas and satisfactory establishment at sampled dispersion 
colony sites indicate that these three parasites, are present throughout a con- 
siderable part of the entire infested area of that region. 
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