Economic entomology for the economicentomolo00smit_0 Year: 1896 74 AN ECONOMIC ENTOMOLOGY. the farmer. There are several sub-families, which together are termed 'lace-winged flies,' from their delicate, finely-reticulated or netted wings, which lie flat and are not folded. The insects are slight, and in the species allied to Hemerobius the colors are brownish or smoky. They are less common than the forms allied to CJuysopa^ which are green, with long antennae and prominent, bright, yellowish-brown eyes, which have given them the name *' golden-eyed flies'' in some localities. They a
Economic entomology for the economicentomolo00smit_0 Year: 1896 74 AN ECONOMIC ENTOMOLOGY. the farmer. There are several sub-families, which together are termed 'lace-winged flies,' from their delicate, finely-reticulated or netted wings, which lie flat and are not folded. The insects are slight, and in the species allied to Hemerobius the colors are brownish or smoky. They are less common than the forms allied to CJuysopa^ which are green, with long antennae and prominent, bright, yellowish-brown eyes, which have given them the name *' golden-eyed flies'' in some localities. They are commonly found in fields or along the edges of woods, and emit, when handled, a peculiarly sickening odor which is quite unmis- takable when once known. In the adult stage the insects feed little or not at all; but the larvae, known as 'aphis-lions,' feed almost constantly, their prey being small, soft-bodied insects of all kinds, aphids or plant-lice ranking as special favorites. Fig. 40. A lace-winged fly, Chrysopa oculata.—a, the eggs ; b, the larva; d, same, feeding on a pear-psylla; e, cocoon, from which /, the adult, has escaped; g, head of adult in front, enlarged. The entire life history of the insects is interesting. The female in ovipositing touches the end of the abdomen to the surface,— usually a leaf,—upon which the eggs are to be laid, and then elevates her body about a quarter of an inch, emitting at the same time a viscid thread which hardens on exposure to the air. At the tip of this the egg is fastened, and we get thus a little
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