A text-book of entomology, including the anatomy, physiology, embryology and metamorphoses of insects, for use in agricultural and technical schools and colleges as well as by the working entomologist . Considering the respective positionsof the individual levers of the leg and FIG. 116 —Section of the fore leg of astag-beetle, showing the muscles: S, ex-tensor, — B, flexor, of the leg; s, exten-sor, — b, flexor, of the femur ; o. femur ;v, tibia ; ./, tarsus ; k, claw ; 109, s, ex-tensor,— b, flexor, of the femoro-tibialjoint, both enlarged. — After FIG. the nature of the materials o
A text-book of entomology, including the anatomy, physiology, embryology and metamorphoses of insects, for use in agricultural and technical schools and colleges as well as by the working entomologist . Considering the respective positionsof the individual levers of the leg and FIG. 116 —Section of the fore leg of astag-beetle, showing the muscles: S, ex-tensor, — B, flexor, of the leg; s, exten-sor, — b, flexor, of the femur ; o. femur ;v, tibia ; ./, tarsus ; k, claw ; 109, s, ex-tensor,— b, flexor, of the femoro-tibialjoint, both enlarged. — After FIG. the nature of the materials of which theyare made, the legs of insects may be likened,as Graber states, to elastic bows, which,whenpressed down together from above, theirown indwelling elasticity is able to raiseagain and thus keep the body upright. This is very plainly shown in certainstilt-legged bark-beetles, in which, as in arubber dull, as soon as the body is presseddown on the ground, the organs of motionextend again without the intervention ofmuscles ; indeed this experiment succeedseven with dead, but not yet wholly stiff,insects. Graber then turns to the analysis of the 117. — Left fore leg of a cid beetle: h, coxa; r, trochanter; o, femur; u, tibia; /, tarsus ;£,claw. — After Graber. movements of illSCCt legs when ill motion, 106 TEXT-BOOK OF ENTOMOLOGY and the mode of walking of these insects in general. This subjecthad been but slightly investigated until Graber made a series ofobservations and experiments, of which we can give only the mostimportant results. The
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishe, booksubjectinsects
