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Washi iy Oscar C, Bartlett, State Entomologist of Arizona, visited the 
ashington office June 12 and the Arlington corn borer laboratory on June 15. 
. etn in June George W. still, a recent graduate of the University 
. Z ihois, L. EH, Briggs, of the Massachusetts Agricultural College, and 
- 4+ Sawyer, of Malden, Mass,, were added to the temporary staff of the 
Arlington corn borer laboratory. 
és Among the visitors to the Washington office in June were Dr. Harry 
- Knight, of the Agricultural Experiment Station, Ames, Iowa, Prof. L. P. 
be i Cornell University, and Dr. W. V. Balduf, of the University of 
O1lS. : 
A survey of field conditions in New England, made in April and May 
by D. W. Jones, R. 6, Ellis, W. G. Bradley, B. E. Hodgson, and H. J. Cronin, 
showed that the Careful practice there of clean-up methods in cornfields 
and weed areas had reduced the volume of plant material infested by the corn 
borer to such an extent that it has been difficult to obtain sufficient ma- 
terial for use in research. This condition has been brought about largely 
through the action of the Massachusetts clean-up law, compelling the feeding, 
plowing under, or burning of infested material, plus the educational effect 
of destructive outbreaks in the past. The low ebb of infestation in the 
Past spring, together with the delayed seasonal development of the corn 
borer in May and June, indicates a continued reduction of corn borer infes- 
tation during the coming season. 
For the period ending June 20, the total liberations of mater para- 
site adults from French importations last spring were as follows: 
New England - Ohio 
melimeria. .crassifemmr Thom. 2637. 0s7; 0; pyoel 1,941 
Mocrogaster tibialis*Neesiele! 2 Yifiecode.1 85997 8,512 
Beenveles Sp... eeeee Cees Laat od ay vee, SBByeurt ny ommeee 
eget Ler rOstaned ae Wiis ss www aeey Lod ----- 
Two additional species, Macrocentrus sp. and Angitia (Dioctes)punctoria 
Roman, are now beginning to give forth adults. A total of 22,344 mated . 
adults of Exeristés roborator Fab., and 55,900 mated adults of Habrobracon 
brevicornis Wesm., have also been reared and liberated in New England, New 
York, Pennsylvania, Ohio, and Michigan, to reinforce and extend the colonies 
of these species liberated in previous years. 
The rearing and liberation 
projects are still in progress. A portion of the French importations was 
assigned to the European corn borer parasite laboratory of the Canadian 
Entomological Branch, at Chatham, Ontario. | 
D. J. Caffrey was at Chatham, Ontario,,on June 7 and 8, to confer 
