. Bulletin - United States National Museum. Science. COLLECTING AND PKESERVING INSECTS BANKS. 17. Fig. 29.—One of the Thysanoptera, Thrips tabaci: a, Adult; 6, antenna of same; c, young larva; d, FULL-GROWN LARVA. gramite fly, whose larva, known as the Dobson, is to be found in most of our running streams. The insects of the suborder Stegoptera are smaller, more delicate insects, which fold their wings roof-like over the body. The ant-lion (lies (Myrmeleons) (fig. 30), whose larvae (fig. 31) make funnel-shaped pits in sand in the bottom of which they wait with ex- tended jaws for any small ins
. Bulletin - United States National Museum. Science. COLLECTING AND PKESERVING INSECTS BANKS. 17. Fig. 29.—One of the Thysanoptera, Thrips tabaci: a, Adult; 6, antenna of same; c, young larva; d, FULL-GROWN LARVA. gramite fly, whose larva, known as the Dobson, is to be found in most of our running streams. The insects of the suborder Stegoptera are smaller, more delicate insects, which fold their wings roof-like over the body. The ant-lion (lies (Myrmeleons) (fig. 30), whose larvae (fig. 31) make funnel-shaped pits in sand in the bottom of which they wait with ex- tended jaws for any small insects that may tumble into the trap, belong to this group. The gauzy lacewing flies (Chrysopa) (fig. 32) or "golden e}res," have a spindle-shaped predaceous larva which wanders over leaves in search of plant-lice. The parent fly of many species deposits the eggs in clusters at the tips of slender wiry stalks. Some of the species have an extremely vile odor. The Mantispidse (fig. 153) have the front legs enlarged and spiny, with which they catch small insects. The young are parasitic in egg sacs of wan- dering spiders. The suborder Mecaptera (Panorpida^) (fig. 154) are flies having the head prolonged below. The body is slender and cylindrical. In the male it ter- minates in a pair of large claspers, from which these insects obtain the common name of " scorpion- ; They catch and eat small insects. Their larvae resemble the true caterpillars, but have eight pairs of abdominal legs. These larvae live in the soil and are predaceous, but are very rarety found, although the adult flies are common in the Eastern States. COLEOPTERA. The Coleoptera, or beetles, as they are universally called, are the insects most common to all observers. Their fore-wings, called elytra (singular, elytron) are hard or leathery, and when at rest meet down a straight line on the back. They show few traces of veins, and beneath them arc folded the other wings, which, though of mode
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