. The American entomologist. Entomology. i8o THE AMERICAN ENTOMOLOGIST. examined about a hundred plants taken at ran- dom, and find from two to five beetles in each. The plants have made but a small growth, and are beginning to wilt under the hot suns.—W. A. Henry, Ithaca, N. Y., May 23, 1880. The insect is the Clover-root Borer {Hylesinus trifolii Muller, Fig. 81), first treated of in our Report to the Department of Agriculture (1878), from which we quote in answer to our correspond- ent's questions ; I have found the insect in all three stages of larva (see Fig. 81, b), pupa (c), and adult (
. The American entomologist. Entomology. i8o THE AMERICAN ENTOMOLOGIST. examined about a hundred plants taken at ran- dom, and find from two to five beetles in each. The plants have made but a small growth, and are beginning to wilt under the hot suns.—W. A. Henry, Ithaca, N. Y., May 23, 1880. The insect is the Clover-root Borer {Hylesinus trifolii Muller, Fig. 81), first treated of in our Report to the Department of Agriculture (1878), from which we quote in answer to our correspond- ent's questions ; I have found the insect in all three stages of larva (see Fig. 81, b), pupa (c), and adult (d), [Fig. 81.]. C')\iir-;-rcoriT Bketle--^, a, rt, bored &tcm_and roots—nat. size ; /', larva ; r, pupa ; d^ beetle—en- larged (after Riley). up to the time of frost, though the perfect beetles at this season very greatly predomi- nate. The insect hi- bernates in any of these three stages, and continues pro- pagating as soon as spring opens, the beetles issuing from the ground and pairing during the early spring months. The fe- male then instinc- tively bores into the crown of the root, eating a pret- ty large cavity, wherein she de- posits from four to pale, whit- ish, elliptical eggs. These hatch in a- '^^^ bout a week, and the young larvae at first feed in the cavity made by the parent. After a few days, however, they begin to burrow downward, extending to the dif- ferent branches of the root. The galleries made in burrowing run pretty regularly along the axis of the roots (Fig. Si, a, a, a), and are filled with brown excrement. The pupa is formed in a smooth cavity, generally at the end of one of these burrows, and may be found in small num- bers as early as September. It is the custom in Western New York to sow the Clover in spring on ground already sown to fall wheat. This is generally done while the .snow is yet on the ground or while the frost is disappearing, one peck of seed being used to the acre. The Clover is allowed to go to seed in the Fall, and
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