Netwinged Beetles And Glowworms 163

and off; other luminescent insects glow continuously. They are common in spring and early summer and are conspicuous by their blinking lights. Species differ in rhythm of their flashes. Flashing is a recognition signal enabling the sexes to find each other. Some species lack light-producing organs. Larvae live on the ground, under bark, and in moist swampy places. They feed on various invertebrates, including snails.

NET-WINGED BEETLES Family Lycidae See also Pl. 5

Identification: FW reticulate, with longitudinal ridges and less distinct cross ridges, and often broadest posteriorly. Soft-bodied. Head concealed from above. Usually yellow or reddish, with black markings. 5-18 mm.

Members of this small group are fairly common, and live on vegetation, flowers, and foliage of trees and shrubs, usually in wooded areas. Some large species are attractively colored. Adults feed on plant juices or on other insects. Larvae are predaceous and occur under bark.

GLOW-WORMS Family Phengodidae Not illus.

Identification: d": broad, flat, soft-bodied; antennae plumose; FW short, pointed, HW extending beyond FW and covering abdomen; black or brownish, with red or yellow markings; 10-30 mm. 9 : resemble larvae but with compound eyes.

This is a small group of uncommon beetles. Males occur on foliage or beneath objects, and often fly to lights. Larvae and females are luminescent. Larvae are predaceous and live under bark or beneath objects on the ground.

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