Insects and insecticidesA practical manual concerning noxious insects and the methods of preventing their injuries . y small insects, while No. 5, is largeenough for any of our species. For the majority ofspecimens of moderate size, No. 4 may be used. Asupply of sheet-cork is also needed. This costs aboutfifty cents a dozen sheets, and may also be obtainedof natural history supply dealers. Butterflies, moths, and some other insects require,for their proper preservation, what is called asetting-board, one of which is shown in Fig. 8It consists simply of two thin strips of pineboard, twelve or s
Insects and insecticidesA practical manual concerning noxious insects and the methods of preventing their injuries . y small insects, while No. 5, is largeenough for any of our species. For the majority ofspecimens of moderate size, No. 4 may be used. Asupply of sheet-cork is also needed. This costs aboutfifty cents a dozen sheets, and may also be obtainedof natural history supply dealers. Butterflies, moths, and some other insects require,for their proper preservation, what is called asetting-board, one of which is shown in Fig. 8It consists simply of two thin strips of pineboard, twelve or sixteen inches long, nailed to endpieces, with a space varying from £ to f-inch be-tween the long strips : a piece of thin cork is fastened to the under sideof the strips so asto cover this pin on whichthe butterfly is fas-tened is pushedthrough the corkuntil the sideFig. 8 setting Board. pieces are level with the base of the wings. The wings are thenbrought forward until the posterior borders of thefront ones are at right angles to the body, and theyare then fastened in place by pieces of card-board2. 26 INTRODUCTION. held down with pins, as shown in the insect should be left thus fastened until dry, sothat the wings will remain in the position usually requires from ten to fourteen days. Some sort of boxes or cases in which to keep thespecimens are of course necessary. The simplest andcheapest receptacle consists of empty cigar boxes,lined on the bottom with sheet cork. Tight woodenboxes of almost any kind will also answer the pur-pose. Shallow drawers with the bottoms lined withcork are excellent. The specimens must frecmently be examined to seethat museum pests—insects which live on dead ani-mal tissues of all kinds—do not destroy these are found, bake the specimens in an ovenfor an hour, at a temperature of 140° Fahrenheit. Moths, butterflies, bees, wasps, and a large numberof similar insects should be pinned through
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Keywords: ., bookcentury1800, bookdecade1890, bookidi, booksubjectinsecticides
