Half hours with insects . INIealy bug, female. Scale insect (young). hose, throwing hot water (150° F.) on them, is the against all plant house pests. After the drenching,sprinkle powdered tobacco over the leaves. Scale Insects.— If we take an imaginary wingless Aphis,flatten the bod}^ shorten and weaken the limbs, elongate thebeak into threads, and endow it with a still more sluggishdisposition, we shall have a scale insect in its simplest form,the Mealy bug of our conservatories (Fig. 74, enlarged).It may be seen on comparison with the immature or larval 14 ] IXSECTS OF

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Half hours with insects . INIealy bug, female. Scale insect (young). hose, throwing hot water (150° F.) on them, is the against all plant house pests. After the drenching,sprinkle powdered tobacco over the leaves. Scale Insects.— If we take an imaginary wingless Aphis,flatten the bod}^ shorten and weaken the limbs, elongate thebeak into threads, and endow it with a still more sluggishdisposition, we shall have a scale insect in its simplest form,the Mealy bug of our conservatories (Fig. 74, enlarged).It may be seen on comparison with the immature or larval 14 ] IXSECTS OF THE PLANT HOUSE. Ill form of the true scale insects (Fig. 75, enlarged) that thefemale Metriy bug is but little more advanced in organizationthan these larvje, though greatl} exceeding them in male meal} bug {Coccus adonkhiin Linn.) is like themale scale insect (Fig. 76, enlarged), and still more nearlyresembles that of the cochineal, Avhicli is two-Avinged, withtwo long caudal wax}- threads. While the female

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Keywords: ., bookcentury1800, bookdecade1880, booksubjectinsects, bookyear1881