Guide to the study of insects, and a treatise on those injurious and beneficial to crops: for the use of colleges, farm-schools, and agriculturists . r be found fully grown,when it drops to the ground and descending a little beneaththe surface transforms, and the beetle appears early in Sep-tember. It is grayish black, the elytra black freckled withgray spots, and striated, with large punctures. The legs aredull brick red ; the femora are unarmed, while the four anteriortibia? have a large rectangular tooth near the base. It is to .11 of an inch in length. As a preventative againstthei
Guide to the study of insects, and a treatise on those injurious and beneficial to crops: for the use of colleges, farm-schools, and agriculturists . r be found fully grown,when it drops to the ground and descending a little beneaththe surface transforms, and the beetle appears early in Sep-tember. It is grayish black, the elytra black freckled withgray spots, and striated, with large punctures. The legs aredull brick red ; the femora are unarmed, while the four anteriortibia? have a large rectangular tooth near the base. It is to .11 of an inch in length. As a preventative againsttheir attacks, the vines should be thoroughly shaken each dayin Fig:. 4(i9. SCOLYTII>.K. 4(J1 The genus Phytobius is closely allied to the preceding; thoKtiropean 1\ veluMs Beck has the habit, as we learn from( ierstaecker (Handbuch der Zoologie) of living under water. The Potato-stalk Weevil, Bar/dins trinotntns Say (Fig. 470 ;larva and pupa ; 471, adult), is a common species in the Mid-dle and Western States, where it causes the stalk to wilt anddie, hence all stalks so affected should be burnt. • The beetleis of a bluish or ash gray color, distinguished as its name im-plies, by having three shiny black impressed spots at the loweredge of the thorax. The female deposits a single egg in anoblong slit about one-eighth of an inch long, which she has pre-viously formed with her beak in the stalk of the potato. Thelarva subsequently hatches out and bores into the heart of thestalk, always proceeding downward towards the root. Whenfully grown it ix a little over one-fourth of an inch long, and isa soft, whitish, legless grub, with a scaly head. (
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Keywords: ., bookcentury1800, bookdecade1870, bookpublishe, booksubjectinsects
