Brown lacewings resemble the common lacewings (Chrysopi-dae), but are brown to pale brown and their wings are densely setose. Adults are 5-11 mm long and the wings are held rooflike over the body. Their wing venation is distinctly different: the chrysopids have a single radial sector, while the hemerobiids appear to have 2-4 veins that branch off the radial vein. These insects are generally found in wooded areas; the adults and larvae are predaceous on scale insects, mealybugs, aphids, and spider mites. They often occur in greenhouses, and adults occur indoors at lights. The large genus Hemerobius is represented by species that occur in North America, the UK, and continental Europe.

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