308 THE CANADIAN NATURALIST. 



bodies up into the air in a stiff attitude, which they main- 

 tain a long time without the slightest motion, so as to have 

 a very close resemblance to a knotty twig. They become a 

 naked pupa, with a mucronate tail, without any spinning. 



F. I suspect one of these, for there are different kinds 

 much alike, produces that large and beautiful Geometra, the 

 Grandee Moth (Geometra Clemataria) ; but I have never 

 reared it, 



C. The hairy larvae of the Buff-leopard Moth (Arctia 

 Isabella) are numerous among grass and bushes. Their hair 

 is close, but rather short and stiff, all black, except on the 

 three middle segments, which are rust-red. They undergo 

 the change to pupa within a cocoon. A few days ago, be- 

 fore the frosts had denuded the brown ash, I shook from one 

 of these trees a large and beautiful caterpillar of a Sphinx, 

 larger and thicker than those of the Twin-eyed Hawk- 

 moth. It was smooth and velvety, light pea-green, with 

 slanting white stripes, and triangular red spots on the sides ; 

 the anal horn was rough, green and pink : the fore parts 

 much more slender than the hind. 



F. I have seen a representation of this larva, in a fine 

 collection of coloured drawings, made by Mr. Titian R. Peale, 

 of Philadelphia, an eminent and zealous lepidopterist ; but I 

 could not ascertain to what moth it belongs. 



C. Mine went beneath the earth in its breeding-box 

 in due course; but after a few days I accidentally dis- 

 covered that it was dead, with a large hole in its side, the 

 viscera corrupted. My suspicions are strong against a dipte- 

 rous larva which I had turned up in the ground ; a long, 

 white, cylindrical fellow, with a taper head, which I put 

 into the same box, not suspecting any danger. 



p. Many of the subterraneous dipterous larvae are 

 fierce and ravenous, and often prey upon caterpillars. You 

 have bought wisdom by experience. 



