. Biennial report of the Oregon State Board of Horticulture ... Horticulture -- Oregon; Fruit-culture -- Oregon; Gardening -- Oregon. Fif^. (i—Thiril stage of the hir- va; embryos becoming evi- dent; enlarged. dew, of which they are very foad, and, in return, j^ather and care for the eggs of the aphids during the winter, colonizing the young in the spring on the proper plants. No such relations exist, however, in the present case. Unlike most other insects, plant lice absorb more food than they can possibly They are constantly engaged in pumping out plant juices, and what they can
. Biennial report of the Oregon State Board of Horticulture ... Horticulture -- Oregon; Fruit-culture -- Oregon; Gardening -- Oregon. Fif^. (i—Thiril stage of the hir- va; embryos becoming evi- dent; enlarged. dew, of which they are very foad, and, in return, j^ather and care for the eggs of the aphids during the winter, colonizing the young in the spring on the proper plants. No such relations exist, however, in the present case. Unlike most other insects, plant lice absorb more food than they can possibly They are constantly engaged in pumping out plant juices, and what they cannot use is excreted, either in little droplets through the honey tubes or in minute jets through the anal opening. It is in this way that they cause the glazed or var- nished appearance upon the leaves below them, and form the bed upon which the black soot fungus already mentioned finds its favorable opportunity to develop. To return to our plant louse which has just inolted. It has yet the same number of joints in the antennje, but these are now more slender, and there is a distinct sensory j)it at the end of the third joint, while the single pit on the fourth joint has changed to a little group of three or four. April 2(), some specimens h id molted a sec- ond time, and were now in their third stage, almost double their original size. The eyes, which in the earlier stages are composed of a few large, round ocelli, placed closely together, are now larger and composed of a greater number of smaller lenses. At the end of the body a little hairy process has become evident, and the third antennal joint shows an obvious tendency into two parts. In the mounted sjiecimens the forming young or embryos are now visible through the body wall. April 28, the fourth stage was reached by the more advanced examples. They are now more oval and seem to be more fully distended, while the eyes are yet larger and more obvious, tend- ing, indeed, to become a little pigmented. The antenn
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