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CEREAL AND FORAGE INSECT INVESTIGATIONS 
W. H. Larrimer, Entomologist, In Charge 
Dr. L. 0. Howard visited the Arlington Laboratory on September 1, 
to consult with D. W. Jones regarding the details of the parasite project. 
R. C. Ellis, of the Arlington laboratory, left for the Monroe, Mich., 
corn borer laboratory on September 12, conveying mated adults of Phaeogenes 
planifrons Wesm., and Angitia (Dioctes) punctoria Roman, two of the intro- — 
duced parasite species, In cooperation with Dr. Luginbill, Mr. Ellis re- 
leased these adults under favorable conditions in the infested fields of 
southeastern Michigan. . ; 
Dr. T. J, Headlee, State Entomologist of New Jersey, and C. H. Hadley, 
Director, Pennsylvania Bureau of Plant Industry, were at the Arlington labora- 
tory on September 13 and 14. ‘They examined the field and laboratory experi- 
ments in progress and made a tour of inspection in the field. Opportunity — 
was also afforded to observe quarantine operations at the Boston market. Dr. 
Headlee and Mr. Hadley planned to continue their tour of observation in the 
corn-borer infested areas of eastern New York and the Middle West. 
On September 7 and 8 Dr. Philip Luginbill and A. R. Marston, of the 
Monroe laboratory, accompanied Prof. R. H. Pettit, of the Michigan State 
College, on an observation tour in the districts infested with the corn borer 
in Essex and Kent Counties, Ontario, | 
Prof. George A, Dean and W. P. Flint, accompanied by L. H.: Worthley 
and D. J, Gaffrey, made’an inspection of corn borer conditions in Michigan, | 
Ohio, and Ontario, during the period August 23 to26. f 
oS Wade returned to Washington on September 15, after spending a 
month assisting in the corn borer investigations in Michigan. 
Recent arrivals of corn borer parasite material from Europe include: 
Phaeogenes planifrons Wesm.. 17,017 

Angitia punctoria Roman =. 111, 209 
Microgaster tibialis Nees. 5,752 
Kulimneria crassifemmr Thom. (973 
Masicera sernilis Rond, 1,652 
Adults issuing from this material have been mated and released under favor- 
able conditions in New England and in the Middle West. Hstablishment of 
the first four species has been definitely proven. | 
Y About the middle of August an infestation survey in the portion of © 
eastern New York where the corn borer was discovered in 1919, just north of 
Schenectady, revealed an increase of over 300 per cent in larval population 
Since the last comparable survey was made of that area in 1924. 
