12 APHORISMATA ENTOMOLOGICA. 



possible, it will leave marks of its bandage on the wings^ and even with 

 the greatest care it is hardly possible with some species to avoid this; 

 as for instance^ with the Whites and the Blues. To avoid this^ therefore, 

 some collectors fii'st fix the wings on the (deal) wood with a pin in each 

 of the two fore ones to the desired extent, and then by placing a small 

 piece of silver paper on them, the thread is wound round and round them 

 without any detriment. 



But to return; the pieces of wood when first turned, will of course 

 be rounded down to the edge, but you will find that, if left so, it will 

 be very difiicult to take them up from any flat surface on which they 

 may happen to stand; and to remedy this defect, you must have them 

 cut off with a saw or a chisel on the other three sides besides that on 

 which they have already been dissevered from the oblong turned piece: 

 also, a narrow piece will have to be cut out transversely in the middle 

 of each, to about half their depth, and a proportionate strip of cork 

 be glued at the bottom of the cleft, filHng it up half way again, and 

 be shaved off to the shape of the wood on the side towards you: on 

 this the insect is to be placed, and placed upright, with the pin 

 straight — perfectly straight, through it, that is to say, through the middle 

 of the thorax: otherwise, let me again and again impress on you, the 

 insect will never look well, no, not though ever so well set. 



Let thus much then suffice for the ground work : now for the further 

 illustration, by way of clue to the ''^net-y-covered" labyrinth. 



^^YORKSHIEE EXTENSIONS." 



The thread to be procured is some that is used in "crochet work," 

 and commonly known by the name of "Moravian thread." It is not 

 generally obtainable at a draper's, but is to be sought for at one of 

 those shops in which Berlin wool and the materials for ladies' fancy 

 work are sold. Thread of the same kind, or at least one that appears 

 to be so, being in fact the single "strands" that compose a thread 

 before they are twisted together into one, is to be procured in the 

 manufacturing districts, being there known by the name of "Cop thread." 

 If this is wound in a single thread on a spool, place the spool on a 

 bar of wire or wood, as in the plate, and the means for extending a 

 lepidopterous insect will, so far, be always ready to your hand. If it 

 be not wound in a single thread, but two or three together, not indeed 



