580 



ARTICULATA, 



Tho LiMK-TKEE SpAN-WouM, Ifibcmia tiliaria, is common in early summer on our elms, 

 poplars, limes, aiui other ornamental trees, and is often very destructive. 



THE I'YRALIDINA. 



In these the win-'s are triani^jular an. I elongated; the legs very short. The caterpillars live on 

 leaves; those of the Pijralis vitis arc very destructive to grape-vines, and also to orchards; the 

 I'./ariuaHs lives upon nieal, and the Aglossa pinguinalis on butter, grease, and similar substances. 



THE TORTRICINA. 



The larval of this tribe possess sixteen feet, and live on the leaves of trees and plants, which 

 they roll up in a sort of tube, within whicli they feed and undergo their metamorphosis. Hence 

 they are called Leaf-Hollers. They are often injurious to orchards. 



THE TINEINA. 



Tins tribe includes a multitude of minute insects, often of elegant forms and beautiful colors. 

 They inhabit the most various situations; most of them either shelter themselves within the 

 substance upon which they are feeding, or form themselves little cases, which they carry about 

 with them. The majority feed upon green vegetable matter; many of these mine in the leaves 

 and stems of plants, Avhile others live upon the surface in small cases neatly made of a little piece 

 of leaf. The most destructive species are those which live upon dry animal and vegetable mat- 

 ter, among which the well-known Cloth or Carpet Moths, Tinea tapetzella, and the Corn- 

 Moth, T. (/raiiella, which attacks corn in granaries, are the most noted. Two species of Galleria 

 live in bee-hives, to which they often do great damage. 



ORDER 5. DIPTERA. 



This, as the name imports, embraces the Two-winged Flies, and includes a larger number of 



species than any other order of insects. 

 In these the head is generally of con- 

 siderable size, and is furnished with a 

 pair of large, compressed eyes, which 

 occupy nearly its whole surface. The 

 legs are well developed, the tarsi com- 

 posed of five joints, terminated by a 

 pair of claws ; the abdominal rings are 

 distinct. 



The larvaj of the Diptera are foot- 

 less grubs or maggots, sometimes des- 

 titute of a distinct head ; in some 

 cases, on reaching maturity they cast 

 their skins, and are changed to free, 

 quiescent pupa? ; while in many spe- 

 cies this transformation takes place 

 within the skin of the larva, which 



FLIES. ' 



then hardens and forms a case for the 

 infant. This vast order is didded and subdivided into numerous tribes and families ; 

 only attempt to notice a few of the most conspicuous species. 



sleeping 

 we shall 



THE CULICID^. 



In the family of the Culicidce, or Gnats, which include several pre-eminently bloodthirsty spe- 

 cies, the proboscis is especially suited for their work of torment. It is often half the length 

 of the insect, slender, slightly thickened at the tip, and incloses six long, sharp bristles. These 

 msects, their curious dances, and the very disagreeable effects of their bite, must be well known 



