Definitions
from The Century Dictionary.
- In entomology, having two broods annually: applied to those species which have two generations during the year, one brood generally appearing in the spring and the other in the autumn.
Etymologies
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Examples
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States the species is single-brooded; in the Southern States it is double-brooded.
Scientific American Supplement, No. 344, August 5, 1882 Various
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Europe that the emergence of the moths will be regular; then they will be single-brooded in Northern or Central Europe, and some will very likely become double-brooded in Southern Europe.
Scientific American Supplement, No. 344, August 5, 1882 Various
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It was one of those double-brooded freaks, which do occur on rare occasions, or merely an Eacles Imperialis moth that in the cool damp northern forest had failed to emerge in June.
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In the south of England, as F.V. Theobald (1909) has lately shown, and also in southwestern Ireland, this species may be double-brooded, the usual condition on the European continent and in the United States of America.
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The larvae feed and grow through the early summer months, in the case of the Small Tortoiseshell (_Vanessa urticae_) pupating before midsummer and developing into a July brood of butterflies whose offspring after a late summer life-cycle, hibernate; while for the larger species of the group there is, in our islands, only one complete life-cycle in the year, though the same insects in warmer countries may be double-brooded.
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Several of the insects mentioned in this survey, like the last-named codling moth, are occasionally double-brooded.
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The Turnip moth in our countries is partially double-brooded, a minority of the autumn caterpillars growing more rapidly than their comrades so that they pupate, and a second brood of moths appear in September.
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Our native 'whites' afford illustration of another interesting feature often to be noticed in the life-story of double-brooded Lepidoptera.
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