. Circular. Insects. 2 DESCRIPTION OF THE PEST. The fully developed insect, somewhat resembling a small, winged black ant, is clearly shown, enlarged, in figure 1, its natural size being indicated by a line at the right. The color is black, with joints of legs and feet yellow. The larva or grub is whitish, with brown jaws, the length being about the same as that of the adult, and the form much like that shown in figure 2, which represents the larva of a nearly related species. LIFE HISTORY. The insect may be found in wheat stems, in its various stages of devel- opment, throughout the year. It
. Circular. Insects. 2 DESCRIPTION OF THE PEST. The fully developed insect, somewhat resembling a small, winged black ant, is clearly shown, enlarged, in figure 1, its natural size being indicated by a line at the right. The color is black, with joints of legs and feet yellow. The larva or grub is whitish, with brown jaws, the length being about the same as that of the adult, and the form much like that shown in figure 2, which represents the larva of a nearly related species. LIFE HISTORY. The insect may be found in wheat stems, in its various stages of devel- opment, throughout the year. It lives through the winter as a larva or grub in cells formed in the stems prior to the ripening of the grain, the adult emerging therefrom in April or May, ac- cording to latitude, or some time after the young grain has thrown up stems and several joints have become ex- posed. The female, us- ing her slen- der, pointed oviposit or, places her eggs in the stems. The exact posi- tion assum- ed is shown in figure 3, from a photograph from life by Mr. G. I. Reeves. The eggs hatch and the young grubs, forming cells, feed in the walls of the stem, reaching their maximum growth by the time the straw becomes fully hardened and ripe. Wintering in the larval state, they pass a short pupal stage and emerge as adults in the spring. While there are both males and females among these insects, [Cir. W]. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Bureau of Entomology. Washington, Govt. print. off.
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishe, booksubjectinsects
