A Study in Insect Parasitism: A Consideration of the Parasites of the White-Marked Tussock Moth, With an Account of Their Habits and Interrelations, ... Descriptions of New Species (Classic Reprint) - Softcover

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Excerpt from A Study in Insect Parasitism: A Consideration of the Parasites of the White-Marked Tussock Moth, With an Account of Their Habits and Interrelations, and With Descriptions of New Species

Many observations are recorded which show the prominent part which parasites take in the reduction of an insect which under favor able conditions has exceeded its normal bounds in respect to numbers. Such constant struggles between species in the apparent effort to pre serve a just balance are met with by every observer in the course of nearly every season's observations. The writer has, however, always desired an opportunity to study the exact details of such a struggle upon a large scale, and this opportunity was afforded in this instance.

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