Outlines of entomology . ndispensable in guiding the flight of all winged OUTLINES OF ENTOMOLOGY, 11 species, and are, to a large extent, the in-struments of communication between in-dividuals of the same kind, as among ants,and no doubt aid the perception of in-sects in many ways that are beyond ourcomprehension. The sense of hearing in insects is notconsidered to be as generally developedas in the higher animals. Yet unques-tionably many insects do hear, althoughthe special organs of this sense have beenlocated in comparatively few ears as have been discovered are ATitennae of i
Outlines of entomology . ndispensable in guiding the flight of all winged OUTLINES OF ENTOMOLOGY, 11 species, and are, to a large extent, the in-struments of communication between in-dividuals of the same kind, as among ants,and no doubt aid the perception of in-sects in many ways that are beyond ourcomprehension. The sense of hearing in insects is notconsidered to be as generally developedas in the higher animals. Yet unques-tionably many insects do hear, althoughthe special organs of this sense have beenlocated in comparatively few ears as have been discovered are ATitennae of insects, arlapted from UOt fouud OU the head, but OU the frOUtauthors. 1 and 3, lamellate ant. of , i . .i i r xi i j „ beetle: 2. capitate ant. of beetle; 4, legs and at the basc 01 the abdomcu. pectinate ant. of b-etle: 5 and 6, iilifoTm . i i , -i j ant. of beetle: 7, bristle tipped ant. of Thcsc Will be more particularly descriDCd fly; 8, knobbed ant. of butterfly; 9, feathered ant. of moth. in a Succeeding CHAPTER lY. THE THORAX AND ABDOMEN. The three segments immediately back of the head constitute theThorax or chest of an insect. This division of the body is very com-pact and usually somewhat globular, or barrel-shaped. Each of the seg-ments or joints composing it has received a special name; the anteriorone—next the head—is termed the Frotliorax^ the middle one, theMesothorax, and the third or posterior one the Metathorax. Each ofthese divisions, though apparently entire, is in reality, as has alreadybeen observed, made up of several irregularly shai)ed pieces, which areconnected in such a way as to afford free play to the strong muscleswithin. The appendages of the thorax are the wings and legs. The wingsof insects are their most conspicuous members, upon which the beautyand, in a great measure, the safety and enjoyment of most species de-pend. In their adult and perfect state nearly all insects possess theseorgans, the only exceptions being the members
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectentomology, bookyear1
