My investigations, the results of which are contained in the following paper, were begun in June, 1882. I collected a number of Chilognatha and kept them in glass jars, the bottoms of which were covered with damp earth. I soon found that Julus terrestris2 was the species best suited for my purpose, as though the eggs presented some difficulties not present in the eggs of other species, yet they were of a convenient size and were easily to be procured in great numbers.

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