. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 38 how far the insects ^y. Their structure indicates that the}^ are strong fliers and capable, with favoring winds, of migrating considera))le distances; but under ordinar}' circumstances they proba]>ly do not fly many miles at a time or in a given THE ACORN MOTH. {Holcocera glandulella Riley.) In connection witli a consideration of the nut weevils a few words should be said in regard to the acorn moth, a Tineid whose caterpillar develops in nuts and acorns, usually in the deserted holes of the Bal- ani
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 38 how far the insects ^y. Their structure indicates that the}^ are strong fliers and capable, with favoring winds, of migrating considera))le distances; but under ordinar}' circumstances they proba]>ly do not fly many miles at a time or in a given THE ACORN MOTH. {Holcocera glandulella Riley.) In connection witli a consideration of the nut weevils a few words should be said in regard to the acorn moth, a Tineid whose caterpillar develops in nuts and acorns, usually in the deserted holes of the Bal- aninus weevils. The adult, or moth, is variable in color, but is more or less ashy gray, the forewings being characterized by transverse pale stripes which are not specially well shown in the illustration, but which will answer for present purposes. The moths vary in size as well as in mottling, the average ex- panse of the forewings being a little less than three-fourths of an inch (see fig. 12, /"). The moth, proper! y mounted, looks decidedly wider than as figured. The life history of this species was long ago de- scribed by Riley in his Fourth Missouri Report (pp. 144, 145). After the weevil, which was the original inhabitant of the nut or acorn, has deserted its temporary tenement, the moth drops an egg into the already injured nut. The caterpillar hatch- ing from this ^.gg develops upon what has been left by the larval nut weevil, meanwhile securing the opening formed by the beetle with a covering of silk to prevent the entrance of natural enemies. Farmers who grow nuts as a side issue and who do not make a special stud}" of the insects afi^ecting their acorns or other nuts are often prone to the opinion that the true nut depredator is the caterpillar inclosed in these nuts after they have fallen and been left on the ground. The acorn moth caterpillar has been described as pinkish-yellowish or gra3nsh-white. Its recognition is facilitated by the illustration, a sho
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