Abstract
The median duration of low-temperature treatment required by the eggs of G. commodus in order that they may develop and hatch without interruption due to diapause was least at 12.7�C., slightly longer or about the same at 15.9�C., and considerably longer at 1O.3�C. At S.5�C. it was not found possible to obtain 50 per cent. of the eggs free from diapause.
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