. Elementary entomology . Fig. 4S9. The Marx tray for specimens in liquid specimens. This, however, is not much superior to alcohol, and in many cases shrinks the specimens more than alcohol would. Material intended for dissection may be treated as above, but if alcohol is used, should be permanently preserved in 70 to 85 per cent alcohol, to which 10 percent of glycerin has been added. Inflating insect larvae. The larvae of most of the Diptera, Coleoptera, and Hymenoptera are preserved in alcohol, as noted above. It has been found, however, that lepidopterous larvae may be preser\^ed much bet
. Elementary entomology . Fig. 4S9. The Marx tray for specimens in liquid specimens. This, however, is not much superior to alcohol, and in many cases shrinks the specimens more than alcohol would. Material intended for dissection may be treated as above, but if alcohol is used, should be permanently preserved in 70 to 85 per cent alcohol, to which 10 percent of glycerin has been added. Inflating insect larvae. The larvae of most of the Diptera, Coleoptera, and Hymenoptera are preserved in alcohol, as noted above. It has been found, however, that lepidopterous larvae may be preser\^ed much better by inflating them, the method of which is as follows : The lan^ae are brought to the laboratory alive, and when ready to be inflated are killed or stupefied in a cyanide bottle. This method will be found much better than killing the lar\'ae in the field, as they should be blown as soon as possible after they are killed. Remove the larva from the cyanide bottle and place it on a piece of blotting paper. A glass tube or pencil is next rolled over the body from the head toward the tip of the abdomen. This causes the alimentary tract to protrude, which is then snipped off at the anus by a pair of sharp-pointed scissors.
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Keywords: ., bookcentury1900, bookdecade1, booksubjectentomology, bookyear1912
