INSECTS. 11 
are phosphorescent, and if they were taken in deep water, 
And as these animals are very liable to lose their colours by 
being put in spirits, a careful noting of these should be taken 
whenever they are caught, as the colours are very evanescent ; 
or, what would be still better, a drawing of the animal should 
be made. 
| InrEstinat Worms.— Whenever we have killed either a 
quadruped, bird, or fish, we should carefully examine the sto- 
mach and intestinal canal of the animal, to see if there are 
any worms; indeed, there are few animals without them; they 
must also be preserved in spirits. Besides the stomach and 
intestines, worms are also found in the livers and other parts 
‘of the body ; also in the back of skate and various fishes. 
. INSECTS. 
This class is subject to infinite variety, according to climate 
and soil. The Entomologist, or the mere collector, must not 
confiie himself to those whose beauty of colouring ren- 
ders them attractive, but collect all that come in the way. 
Those species which have wings, and fly around plants, we 
take by means of gauze nets, as also those which swim in the 
water. For the construction of these different nets, see plate 
IV. figs. 7. and 9.—See descriptions, p. 75, &e. Those which 
live on putrid substances, and such as are disagreeable to the 
touch, are seized with pincers; they are first put into cam- 
phorated spirits to render them clean. ‘Trees are the habita- 
tions of innumerable insects, many of them skulk under the 
old rotten bark, and others attach themselves to the foliage. 
A cloth should be spread under the trees, or an umbrella, and 
the branches shaken with considerable force, when they will 
fall down, and may then be caught. 
Insects are killed by making a crow-quill into a long point, 
and dipping it into prussic acid, an incision with it may be 
made immediately below the head of the insect betwixt the 
shoulders, which usually produces instant death. But this 
acid must be used with much caution, because its effects are 
almost as instantaneous and fatal in the human subject as in 
the lower animals. When cork cannot be had for lining the bot- 
toms of the boxes, a layer of bees wax may be used in its stead. 
