Marvels of insect life ; a popular account of structure and habit . e crabs and lobsters,spiders, centipedes. Insects, these creatures agree inhaving the bod\ built in seg-ments or rings, all or someof which bear jointed append-ages. The Insects differ fromthe others in having thesesegments grouped, in adult life,into three regions, usuallyfpiite distinct. These regionsare the head, the fore-body,and the hind - body. Thespiders, which are commonly-regarded in popular esti-mation as Insects, have onlytwo body-regions. There areother differences, of course,which are not evident upon asup
Marvels of insect life ; a popular account of structure and habit . e crabs and lobsters,spiders, centipedes. Insects, these creatures agree inhaving the bod\ built in seg-ments or rings, all or someof which bear jointed append-ages. The Insects differ fromthe others in having thesesegments grouped, in adult life,into three regions, usuallyfpiite distinct. These regionsare the head, the fore-body,and the hind - body. Thespiders, which are commonly-regarded in popular esti-mation as Insects, have onlytwo body-regions. There areother differences, of course,which are not evident upon asuperficial view of the exteriorform ; but e\en here two orthree additional points may bementioned, contrasting a spiderwith an Insect. Thehead of the Insectbears a pair of an-tenna:^, or feelers ;the spider has noantennae. The Insect,with a few excep-tions among thesimpler forms, has apair of prominentcompovmd eyes madeup of a large num-ber of lenses, andtwo or three simplee\es, or ocelli,placed between thecompound e3^es. Thespiders eyes are ailsimple, and nuinlier. The Nerves of an Insect. Hire is shown the nervous system of a central trunk line is enlarged intoknots or nerve centres at intervals, from whichfiner nerve threads extend to the extremitiesof th: limbs and to every part of the body.
Size: 1231px × 2030px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjecta, booksubjectinsects
