. Bulletin. e of a little over an inch, with yellow or yellowishred wings (Fig. 1) marked by irregular dark lines. They live from sixto thirty-five days, and after mating the females deposit their eggs insmall irregular masses, cemented together, on the leaves of their foodplants (Fig. 2). Each mass contains from five to fifty or more glisten-ing white eggs. Each moth lays from two hundred to eight hundredeggs, the number laid by moths of the first generation being somewhatsmaller than that of the second. The eggs hatch in from five to ten small caterpillars feed externally for a shor
. Bulletin. e of a little over an inch, with yellow or yellowishred wings (Fig. 1) marked by irregular dark lines. They live from sixto thirty-five days, and after mating the females deposit their eggs insmall irregular masses, cemented together, on the leaves of their foodplants (Fig. 2). Each mass contains from five to fifty or more glisten-ing white eggs. Each moth lays from two hundred to eight hundredeggs, the number laid by moths of the first generation being somewhatsmaller than that of the second. The eggs hatch in from five to ten small caterpillars feed externally for a short time and then enterthe stems and the larger parts of the leaves (Fig. 3). They completetheir growth in from thirty-five to sixty days, pupate in their food plants,and, in Massachusetts, emerge again as moths during July and lay their eggs in the same manner as the first generation, and the 289 ?ii^_„ :J^^ yj^^^^^^^^K^ /« 1 1 Fig. 2. Egg-mass of European corn-borer on leaf of corn; natural. Fig. 3. Corn plants showing the characteristic breaking over of the tasselcaused by the work of the European corn-borer. 290 caterpillars hatching frorfiMieift-become full-grdwfton the appftoach ofcold wfeather anii fcibernate in the Stems of their food plants. Althoughthere ar6 two full annual generations of the insect in the Massachusettsarea, there is only one in New York, owing, no doubt, to the colderclimate. There would certainly be two generations in Illinois, and possi-bly three in the southern part. , ?
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Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectnaturalhistory
