. Bulletin of the Department of Agriculture. Agriculture; Agriculture. THE BLACKHEAD FIEEWOEM OF CEAjSTBEEEY. 17 often have a light golden-brown sheen. The antennae are about one- half the length of the body and more or less bristlelike. The adults live from 3 to 33 days after they emerge, and during this time eat little or nothing, except, perhaps, a little nectar from the blossoms, or water in the form of dew or rain. Habits of Flight. After the moth emerges from the pupal case it rests for a short time, during which the wings are spread and dried. It then starts to fly and moves rather
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. THE BLACKHEAD FIEEWOEM OF CEAjSTBEEEY. 17 often have a light golden-brown sheen. The antennae are about one- half the length of the body and more or less bristlelike. The adults live from 3 to 33 days after they emerge, and during this time eat little or nothing, except, perhaps, a little nectar from the blossoms, or water in the form of dew or rain. Habits of Flight. After the moth emerges from the pupal case it rests for a short time, during which the wings are spread and dried. It then starts to fly and moves rather swiftly in a short, jerky, darting motion, making usually only short flights from place to place over the vines. Par- ticularly on heavily infested bogs the moths are very conspicuous for their habits of flight. They will often be seen to rise in large numbers when disturbed, as by spraying or by a person walking through the vines on a warm after- noon, suggesting to some the appearance cloud. of. Periods of Activity. A few moths may generally be seen flying from tip to tip almost every hour of the from the time of their first appearance in June until late in September and October, but the time of day they are most active is from aoout 3 o'clock in the afternoon until after dusk. During this period, especially if the weather is warm, they may be seen to rise in the air for a few feet, making their characteristic short, jerky flights. Fig. 9.—Tlie adult or moth at rest on a cranberrj' up- right. Enlarged about 6 times. Migration. It is in the moth stage principally that the blackhead fireworm spreads itself over the bog or invades an adjoining one. The moth, however, flying only short distances, would not naturally migrate more than several yards from its original region of activity; but, helped by the wind, it is possible for it to be carried as far as several 74890°—22 3. Please note that these images are extracted from scanned page images that may have been digital
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