Natura biografie; la vita di alcuni di ogni giorno le farfalle; tarme; cavallette e vola . è thewebhing insieme, in primavera, di due o tre delcarrello terminale delle foglie di piccoli cespugli di ciliegia. Thesewebbed foglie non sono affatto cospicua, somigliante a atfirst il normale svolgimento lascia in corrispondenza della punta del ramoscello.Se si apre themup, tuttavia, youwill trovare all'interno di ao^spettacolare oftiny numero di larve di colore biancastro,che sarà dis-turbed dall' ONU-usuale conditionsas alla luce e willrapidly fuga. Quando avete trovato havethus ayoung queste colonie tenda-maker,si wonderwhere essi camefrom. Esso seemsprobabl

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Nature biographies; the lives of some every-day butterflies; moths; grasshoppers and flies . is thewebhing together, early in spring, of two or three ofthe terminal leaves of the small cherry bushes. Thesewebbed leaves are not at all conspicuous, resembling atfirst the normal unfolding leaves at the tip of the twig.If you open themup, however, youwill find inside ao^reat number oftiny whitish larvae, which will be dis-turbed by the un-usual conditionsas to light, and willrapidly escape. When you havethus found ayoung colony ofthese tent-makers, you will wonderwhere they camefrom. It seemsprobable that theyrecently hatchedfrom eggs, but ifyou look carefully over the adjacent parts of the twig, you will be unable to find any indications of the egg-shells. In the case of some butterflies that deposit theireggs singly, the caterpillar on hatching eats up theempty egg-shell — so that no hungry enemy may discoverthat a young caterpillar is in the vicinity. But so far asI know this method is not adopted by the larv^ that livein colonies, so it seems improbable the egg-shells could 65. P^iG. 65. — A little Later Stage of Tent. Nature Biographies. have been eaten by the tiny creatures that you findwithin the roHed leaves. The only thing to do is toextend your search farther afield: continue to examinethe bark carefully from the tip of the twig toward thebase, and just before you reach the ground, if your eyesare sharp, you will find what appears to be a bit of barkwith a lot of little holes in it; it is slightly raised above the surroundingsurface, althoughof nearly or quitethe same colour.Through a lensyou will readily seethat this is an ^ggmass from whichthe larvae havehatched. You canbut marvel at theperfect adaptationshown by theseeo^os to the condi-tions of their life:were they on theupper part of the branch, many of the masses wouldbe found by the eager eyes of birds, notwithstandingtheir resemblance to the bark; but down by the groundthere is a bit of surface which i

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• bookcentury1900
• bookdecade1900
• booksubjectinsects
• bookyear1901