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Published online by Cambridge University Press: 31 May 2012
I obtained, June 16, 1880, from the trunk of a Populus candicans, at Buffa1o, N. Y., two larvæ which proved to be those of C. unijuga. They had passed their last moult when taken ; although they continued to feed in confinement for five or six days they increased in size but little during that time; their habits are strictiy nocturnal.