808 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 laiTa, 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. 



F. — Many of the subterraneous dipterous larvse are 

 fierce and ravenous, and often prey upon caterpillars. You 

 have bought wisdom by experience. 



