Directions for collecting and preserving insects . attached to a small rubber bag, previously inflated\vith air, the ordinary dentists or chemists gas bag answering admir-ably for this purpose. The larva is now ready for drying, and for thispurpose a drying oven is required into which it is thrust and ma-nipulated by turning it from side to side, to keep it in proper shape anddry it uniformly until the moisture has been thoroughly expelled. Anapparatus which I have found very convenient for this purpose is rep-resented at Fig. ](>!>. It consists of a tin box with mica or glassslides, c,
Directions for collecting and preserving insects . attached to a small rubber bag, previously inflated\vith air, the ordinary dentists or chemists gas bag answering admir-ably for this purpose. The larva is now ready for drying, and for thispurpose a drying oven is required into which it is thrust and ma-nipulated by turning it from side to side, to keep it in proper shape anddry it uniformly until the moisture has been thoroughly expelled. Anapparatus which I have found very convenient for this purpose is rep-resented at Fig. ](>!>. It consists of a tin box with mica or glassslides, c, to allow the larva to be constantly in sight. It has also ahinged top, />, which may be. kept closed or partly open, or entirelyopen, as may be necessary, during the operation. The ends of thebox are prolonged downward about 5 inches, forming supports P>eiieath it is placed an alcohol lamp,/, which furnishes theheat. In the end of the box is a circular opening, <7, for the lutroduc- [81] COLLECTING AND PRESERVING INSECTS tiou of the larva, and this may be entirely or partly closed by a slidingdoor, a. It will be found of advantage to line the bottom of the box (inside) with a brass screen ofvery fine mesh to distributeand equalize the heat. Thisapparatus can be very easilymade by any tinsmith and willanswer every purpose. The larva- of Microlepidop-tera or young larva? may bedried without expressing thebody contents, and will keep,to a great extent, their normalshape and appearance. Themethod consists in placingthem on a sand bath, heatedby an alcohol lamp. The va-por generated by the heat inthe larvae inflates them andkeeps the skin taut until thejuices are entirely may then be glued atonce to cardboard and pinnedin the cases. In the mounting of large in-flated larvae I have adoptedthe plan of supporting them on covered copper wire of a size varying withthe size of the larva. A pin is first thrust through a square bit of cork andthe w
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Keywords: ., bookauthorrileycha, bookcentury1800, bookdecade1890, bookyear1892
