. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 34 OUR SHADE TREES AND THEIR INSECT DEFOLIATORS. uutil the middle of August, reach full growth aud wander about seek- ing places for transformation from the end of August to the end of Sep- tember. "The species invariably hibernates in the chrysalis state within its cocoon, and the issuing of the first brood of moths is, as a consequence, tolerably regular as to time, /. e., they will be found issuing and flying slowly about during the evening, and more particularly at night, dur» ing the whole month of May,
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 34 OUR SHADE TREES AND THEIR INSECT DEFOLIATORS. uutil the middle of August, reach full growth aud wander about seek- ing places for transformation from the end of August to the end of Sep- tember. "The species invariably hibernates in the chrysalis state within its cocoon, and the issuing of the first brood of moths is, as a consequence, tolerably regular as to time, /. e., they will be found issuing and flying slowly about during the evening, and more particularly at night, dur» ing the whole month of May, the bulk of them early or late in the month, according as the season may be early or late. They couple and oviposit very soon after issuing, and in ordinary seasons we may safely count on the bulk of the eggs being laid by the end of May. During the month of June the moths become scarcer and the bulk of them have perished by the middle of that month, while the webs of the cater]>illars become more and more conspicuous. The second brood of moths begins to ap- pear in July, and its occurrence extends over a longer period than is the case with the first or spring brood. The second brood of caterpil- lars may be found from the end of July to tbe end of September, hatch- ing most extensively, however, about the first of August. "In Massachusetts and other Northern States the first moths issue in June aud Julj-; the caterpillars hatch from the last of June until the middle of August, reach full growth and wander about seeking places for transformation from the end of August to the end of Septem- ber. " The following general remarks upon the different stages refer to Washington and localities where the same conditions hold: The E(]gs (Fig. 17, ft).—" The fe- male moth deposits her eggs in a cluster on a leaf, sometimes upon the upper and sometimes on the lower side, usually near the end of a branch. Each cluster consists of a great many eggs, which are depos- ted
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