-535- 
shipping boxes.—' Of the 110,000 adults of this parasite shipped in this way 
during the 19^0 season, only 787 died en route from the shipping point to 
time of release in the field, a mortality of only 0.7 percent. 
A total of 78, .815 adults of M. gifuensis , for release in the United State 
were handled during the 19^0 season. From the time- of collection to release 
in the field, 7^3 of these adults died, a mortality of only 0.9 percent, an 
unusually low mortality for this fragile species. 
Incidental to -a study of corn borer parasite status in the field, a smal 
number of parasites were reared late in the season. These adult parasites 
were shipped to Canada for release in the corn borer infested area around 
Quebec, The parasites were shipped during the period August 12-19, inclusive 
A total of 6,005 Macrocontrus • gifuensis and 330 adults of Inareolata punc tori’ 
Roman were in the consignments sent, The mortality in these shipments was 
2.7 percent for the former species and 2,1 percent for the latter. 
SUMMARY 
A total of 190,783 European corn borer parasites \\ r ere released in the 
United States during 1940. Of- this number 112,711 were adults of the egg- 
larval parasite Chelonus annul ip es Wesm. and 78,072 wore adults of the 
braconid Macrocsntrus gifuensis Ashm. Most of the adults of the former specie 
were laboratory-reared, utilizing Ephostia kuehniella Zell, as the host. M, 
gifuensis. was obtained from corn borer larvae collected in southeastern 
Massachusetts, where this imported parasite is'wcll established and abundant. 
Releases of C. annul ip es were concentrated in the Hudson River Valley, 
H. Y. Releases of M, gifuensis were made in southern Hew England, in eastern 
Hew York, including Long Island, and in Hew Jersey. A test release was made : 
northern Ohio. 
Only 0.8 percent mortality was experienced in the handling of 192,313 
parasites . from emergence in the laboratories to liberation in the field in 
the various States. • 
Consignments of Inareolata, punctoria Roman and Macrocentrus gifuensis foe 
release near Quebec, Canada, totaled 6,335 adult parasites. 
r 
Shipping containers approximately as described in Bureau of Entomology and 
Plant Quarantine ET Circular 77 • 
