. Cyclopedia of American horticulture, comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers, and ornamental plants sold in the United States and Canada, together with geographical and biographical sketches. Gardening. 1139. Larva of a sphinx moth. 1138, Nymphs of the four-Uned leaf-bue and adult of the tarnished plant-bug. The amJillest one is the nytnph recently hntf-hed. The next is the nymph after the moult. The uuayo is shown at the right. Hair Hues at the right of nymphs, and sm;dl Jiguro near imago indicate the n
. Cyclopedia of American horticulture, comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers, and ornamental plants sold in the United States and Canada, together with geographical and biographical sketches. Gardening. 1139. Larva of a sphinx moth. 1138, Nymphs of the four-Uned leaf-bue and adult of the tarnished plant-bug. The amJillest one is the nytnph recently hntf-hed. The next is the nymph after the moult. The uuayo is shown at the right. Hair Hues at the right of nymphs, and sm;dl Jiguro near imago indicate the natural size. in many adult Insects. Cater]>illars and other larvae pos- sess only simple eyes. It is thought that each facet of the compound eye sees a part of an object; thus the whole eye would form a mosaic picture on the Insect's brain. The simple eyes doubtless see as our eyes do, and seem to be best adapted for use in dark places and for near vision. Insects do not see the form of objects distinctly, hut their eyes are doubtless superior to ours in distin- e:uishing the smallest movements of an ob- ject. It is now supposed that no Insectn can dis- tinctly see objects at a greater distance than (J feet. It must be a sixth sense, a sense of direction, which en- ables the bee to find its way for a mile or more back to its home. In- sects are doubtless able to distinguish the color of objects, and some Insects seem to prefer certain colors. Blue is said to be the favorite color of the honey-bee, and violet that of ants; ants are also apparently sensitive to the ultra- violet rays of light, which man cannot perceive. It is generally supposed that the shape and high colors of flowers attract Insects: but recent ex- periments seem to show that Insects are guided to flowers by the sense of smell rather than by sight. The hard outer skin of an Insect r .,, , has no nerves distributed in it. hence M'j?*'^^^Ml;/ 'V ^^ ^^ °^* sensitive; but it is pierced U-. â - ^w«J"
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