ZOOLOGY. 227 



Food, aaimal and vegetable substances ; these cast their 

 shells or skins like the preceding genera. 



13. Scolopendra. Centipede. Antennae setaceous ; body 



depressed, elongated ; legs numerous, equalling in nunv- 

 ber the segments of the body on each sid^e; feelers two, 

 setaceous. 



These are a disgusting tribe, frequenting dark and noisome 

 places, as under stones, or in decaying wood, some few are , 

 found in fresh, and fewer in salt water, they prey on other! 

 insects, and decaying animal substances. 



14. Julus. Antennoe moniliform; pa//?? two, jointed ; bod\y 

 nearly round ; legs very numerous ; feet twice as man y 

 as the segments of the body on each side. 



This genus is found abundantly in the decaying moujd 

 within hollow trees, and particularly abound in putrid 

 fungi ; when disturbed, they roll themselves up in a spiral 

 form. All the genera in this order, are instantly killed by 

 emersion in spirits. 



We shall now proceed to the methods of collecting Insects, 

 which are of two kinds, by breeding them from the egj or 

 Caterpillar, or by catching them in their perfect or fly 

 state. Of these, the former is much to be preferred, as 

 besides the pleasure arising from observing their gradual 

 developement from the egg to the perfect Fly, we can destroy 

 them previous to their having injured themselves by flight or 

 otherwise ; the difficulty of procuring the most beautiful and 



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