Fifth report of the United States Entomological Commission, being a revised and enlarged edition of Bulletin no7, on insects injurious to forest and shade trees . d less regularpatches, so that at least 500 eggs may be considered as the real number producedby a single individual. The egg, measuring °™, is of a bright golden-yellowcolor, quite globular, and ornamented by numerous regular pits, which give it undera magnifying lens the appearauce of a beautiful golden thimble. As the eggs ap-proach the time of hatching this color disappears and gives place to a dull leaden hue. The interval be
Fifth report of the United States Entomological Commission, being a revised and enlarged edition of Bulletin no7, on insects injurious to forest and shade trees . d less regularpatches, so that at least 500 eggs may be considered as the real number producedby a single individual. The egg, measuring °™, is of a bright golden-yellowcolor, quite globular, and ornamented by numerous regular pits, which give it undera magnifying lens the appearauce of a beautiful golden thimble. As the eggs ap-proach the time of hatching this color disappears and gives place to a dull leaden hue. The interval between the time of depositing and hatching of the eggs for the firstbrood varies considerably, and the latter may be greatly retarded by inclementweather. Usually, however, not more than ten days are consumed in maturing theembryo within. The eggs of the summer brood seldom require more than one weekto hatch. Without check the offspring of the one female moth might in a single season (as-suming one-half of her progeny to be female and barring all checks) number 125,000caterpillars in early fall—enough to ruin the shade trees of many a fine street. ^ J/.
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