. Elementary entomology . Fig. 232. The giant root-borer (Friomis laticollis) (After Riley) large one and includes many serious pests, such as the round- headed apple-tree borer and others with similar habits. Three com- mon blackish species, brilliantly striped with yellow (Fig. 234), are known as locust-borer, hickory-borer, and sugar- maple-borer, after their respective food plants, which are frequently killed from the work of their larvae. Among our largest beetles are the prionids, the larvae of which infest the roots of various fruit and shade trees and herbaceous plants. The broad-necke
. Elementary entomology . Fig. 232. The giant root-borer (Friomis laticollis) (After Riley) large one and includes many serious pests, such as the round- headed apple-tree borer and others with similar habits. Three com- mon blackish species, brilliantly striped with yellow (Fig. 234), are known as locust-borer, hickory-borer, and sugar- maple-borer, after their respective food plants, which are frequently killed from the work of their larvae. Among our largest beetles are the prionids, the larvae of which infest the roots of various fruit and shade trees and herbaceous plants. The broad-necked prionus is from one to two inches long, pitchy black, with the thin margin of the prothorax toothed, as shown in Fig. 232. The oak- pruner is a slender, brown species, about three fourths of an inch long, which lays Fig. 233. The oak-pruner [Elaphi- dion pai-alklum) a, larva ; /', pupa in its burrow ; f, beetle ; k, k, cut ends of twig. (After Riley) its eggs in the twigs of oak, maple, and various fruit trees. The larvae hollow out the interior of the twigs which are broken off by the winds, and in these they pupate. One of our largest species is the common sawyer, a large gray beetle one and one fourth inches long, with very long antennae, whose larvae bore into the heart of felled pine and other softwood trees, making large holes half an inch in diameter. The raspberry cane-borer {Obcrca
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Keywords: ., bookcentury1900, bookdecade1, booksubjectentomology, bookyear1912
