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Published online by Cambridge University Press: 31 May 2012
The ill wind that blows insects into a lake may blow the entomologist some good if he be on hand to collect them when they are cast upon the beach. During recent years I have gathered much material for class use from the drift line upon the beach at Lake Forest, with great economy of time and labour. After every on-shore breeze following sunshiny summer weather some insects are cast up by the waves, and occasionally there is a great accumulation of them. Twice I have observed accumulations of them quite out of the ordinary; the first time, in August, 1899, when the drift was predominantly crickets of a single species (Nemobius fasciatus)*, and a second time in June, 1904, when it was predominantly May beetles of a single species(Lachnosterna fusca). It is the purpose of this paper to record some observations on this occurrence.
* An account of this I published in the Occasional Memoirs of the Chicago Entom. Soc., Vol. I., No. 1.