. Elementary text-book of zoology, general part and special part: protozoa to insecta. Animals. NEUROrXERA. 563 jointed, filiform or setiform, tlie eyes of medium si ,e, and the tarsuses five-jointed. The prothorax is always freely moveable, and the abdo- men is composed of eight or nine segments. The nervous system is similar to that of the Orthoptera, and consists of clearly distinct thoracic and abdominal gangUa. There is always a muscular gizzard on the digestive canal {^Myrmeleontidce, Panorpidce). A sucking stomach Ls found only in the Hemerohidce. Six to eight long Mal- pighian tubes ar
. Elementary text-book of zoology, general part and special part: protozoa to insecta. Animals. NEUROrXERA. 563 jointed, filiform or setiform, tlie eyes of medium si ,e, and the tarsuses five-jointed. The prothorax is always freely moveable, and the abdo- men is composed of eight or nine segments. The nervous system is similar to that of the Orthoptera, and consists of clearly distinct thoracic and abdominal gangUa. There is always a muscular gizzard on the digestive canal {^Myrmeleontidce, Panorpidce). A sucking stomach Ls found only in the Hemerohidce. Six to eight long Mal- pighian tubes arise from the hindgut. The metamorphosis is always complete. The larvre prey on other animals, and are provided Avith biting or sucking forceps (formed from the mandibles and maxillae). They pass into a quiescent pupal stage, in which the parts of the Avrnged insect can al- ready be made out. The pupa is often surrounded with a cocoon, but possesses the power of locomotion to a certain de- gree, since before the animal passes out of the pupal stage it ceases to be quiescent and seeks out a place suitable for development. Fossil remains are found in tertiary forma- tions and in amber. Sub-order 1. Plaiiipennia. Front and hind AvLngs similar, never capable of being folded. The mouth parts are powerful and adapted for mastication. Fam. Sialidae. With large head bent obliquely forwards, and pro- iecting hemispherical facetted ej-es. The wings, when at rest, overlap one another like the slates on a roof. The larvae have biting mouth-parts, with four-jointed maxillary palp-> and three-jointed labial palps. Sialix lutaria L., Corydalis cornnta L., Baphidla ojdiioj'sis Schuni. camel-neck flics. •Fam. Panorpida? (Schnabelfliegen). The head is small and placed vertically ; the multiarticulate antennse are placed in the frontal region beneath the ocelli. The oral region is prolonged in the form of a beak. The wings are long and narrow, and similar to each other. The larvie are like ca
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectanimals, bookyear1892
