48 THE BUTTERFLY VIVARIUM. 



filaments attached to their own point, which, like 

 the crest described on those of the "Water Scorpion, 

 serve like an array of lances to keep off marauding in- 

 truders. Among other methods adopted by different 

 insects for protecting their eggs, I may notice that 

 of a Moth of the Bombyx family, Liparis Salicis, 

 which covers its ova with a protective tissue of a 

 cottony and yet somewhat friable nature, which is 

 perfectly waterproof, and effectually conceals them 

 against injury from wet in very rainy seasons, and 

 from accidents of many other kinds, 



Some insects resort to still more decisive mea- 

 sures for the protection of their eggs, actually carving 

 a recess in a branch in which to deposit them, as in 

 the case of the Hylostoma Bosea, for instance, which 

 insect possesses the power of making an incision in a 

 young shoot by means of a saw-like instrument, near 

 the tail, with which it is furnished, and in the inci- 

 sion thus made it deposits its eggs, covering them 

 immediately with a greenish fluid, which it emits 

 from the mouth, and which rapidly hardens on 

 exposure to the air. 



The female of BencHtes Bacchus, an insect 

 infesting the vine, makes preparations for deposit- 

 ing her eggs by forming a kind of nest, which she 

 does by rolling up a portion of some well-selected 



