. Elementary text-book of zoology. Zoology. NEUROPTEEA STREPSIPTERA. 565 Hydropsyche and R/tyacojihila, are fastened to stones. In the walls of these cases there are sand grains, bits of plants and empty snail shells. The larva: have biting mouth parts and filiform trachea! gills on the body segments. They project their horny head and thoracic segments, with their three pairs of legs, from these tubes and crawl about. The pupa leaves the case, which serves also as a pupal skin, and develops into the winged insect out of the water. The per- fect insect resembles the Lcpldoptern in many respects
. Elementary text-book of zoology. Zoology. NEUROPTEEA STREPSIPTERA. 565 Hydropsyche and R/tyacojihila, are fastened to stones. In the walls of these cases there are sand grains, bits of plants and empty snail shells. The larva: have biting mouth parts and filiform trachea! gills on the body segments. They project their horny head and thoracic segments, with their three pairs of legs, from these tubes and crawl about. The pupa leaves the case, which serves also as a pupal skin, and develops into the winged insect out of the water. The per- fect insect resembles the Lcpldoptern in many respects, and lives near water on leaves, and the stems of trees. The female lays her eggs in clumps enclosed in a gelatinous case on stones and leaves near water. Pliryganta striata L. (tig. 4(J9). Mystacidvs quadrifasoiatus Fabr., Hydropxychv variabllis Pict. Order 4.—; Insects rudimentary anterior wings rolled up at the points and large hind wings which can be folded longitudinally. The mouth parts are rudimentary. In the female there are neither wings nor legs. The larvcfi are parasitic in the body of Hymenoptera. The mouth parts are reduced in the adult sexual animal, and. FIG. 469.—</, Pliryyam <i uti-inta. I, The larva freed from its case (rescue animal). consist of two pointed mandibles which overlap one another, and small maxilla:!, which are fused with the lower lip and are provided with two-jointed palps. The prothorax and mesothorax are two very short lings, but the metathorax is unusually elongated, and covers the base of the abdomen, which consists of nine segments. The males possess small rolled-up wing covers, and very large hind wings, which can be folded longitudinally like a fan. The females have no eyes, and remain through life without wings or legs like maggots; they never leave their pupal skin nor their parasitic * W. Kirby, " Strepsiptora, a new order of Insects," Transact. Linn. Soc., Tom X. v. oiebold, " Ueber
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectzoology, bookyear1884
