. The American fruit culturist. ing value. The Roiind-Headcd Apple-Trce Borer {Saperda Candida).—This insect enters the tree and burrows into the solid woodnear the surface of the earth. It is a dangerous enemy; forwhile only a fev/ small holes are visible in the bark outside,it may have perforatedthe wood internally inall directions. Not only the apple-tree, but the quince,mountain-ash, and haw-thorn sufier greatly fromthe attacks of this in-sect. The parent insect isa beautiful, brown-and-white striped beetle(Fig. 215), about three-fourths of an inch long,which flies at night. It deposits it
. The American fruit culturist. ing value. The Roiind-Headcd Apple-Trce Borer {Saperda Candida).—This insect enters the tree and burrows into the solid woodnear the surface of the earth. It is a dangerous enemy; forwhile only a fev/ small holes are visible in the bark outside,it may have perforatedthe wood internally inall directions. Not only the apple-tree, but the quince,mountain-ash, and haw-thorn sufier greatly fromthe attacks of this in-sect. The parent insect isa beautiful, brown-and-white striped beetle(Fig. 215), about three-fourths of an inch long,which flies at night. It deposits its eggs in June and later in slits cut in the bark,usually near the surface of the ground. The egg-stage issaid to last about twenty days. The first indication of thework of the larva is the appearance of a small round hole,made visible by the ejected dust. The young larvae tunnel under the bark and feed upon thesapwood, gradually working their way upward and afterwarddownward. Durins: the second season the larvae attain about. Figs. 213 and 214. Fig. 215. Fig. 216. The Round-headed Apple-tree 213 and 214.—The grub. FiG. 215.—The beetle. FiG. 216.—The pupa. All natural size. (U. S. Div. of Entomology.) 164 DESTRUCTIVE INSECTS. half their growth, still living on the sap-wood. They ceasefeeding during the winter and remain in their burrows beneaththe surface of the soil. By the end of the second year theyhave penetrated deeper into the solid heart-wood, and theirburrows are closely packed behind them with their another winters rest they continue their work in thesolid wood, and toward the end of the season gnaw outwardto the bark. With the aid of its castings a cell is then formedin which the full-grown larva (Figs. 213 and 214) remains untilspring, when it transforms to a pupa (Fig. 216). The pupalstage is said to last about twenty daj^s, and in May or Junethe pretty beetles emerge through a smooth, round hole cutwith their powerful jaws. This b
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