LÉPIDOPTÉROLOGIE COMPARÉE 423 



a large number both of thèse and of hybrid langeï. 1 kept them 

 in a cool outhouse ; the mice there soon discovered them and, 

 having nibbled a hole in the muslin, dragged them through and 

 ate them. I lost none of the others in this manner, except a few 

 of hybrid smallmanï which has similar habits. 



If alarmed, they drop readily, but seldom feign death for a 

 long time. 



ThoLigh not apparently constitutionally weaker than the other 

 hybrids, they are more easily affected by the disease which carries 

 off so many of the larvas in their last skin. 



They become fullfed a little later than those of denhami and 

 descend a little further into the soil. The cocoon, which they 

 spin, is of the feeblest description, being composed of earth mixed 

 with a very small quantity of silk. They do not change to pupae 

 for about a week but, just before doing so, the pupal colour shows 

 through the skin as a délicate leaf green, somewhat tinged with 

 brown. 



Pupae. 



Thèse, when first formed, are coloured with a bright green 

 tending to deepen in the wingcases, and becoming browner at the 

 broadest part of each segment. They soon turn to the normal 

 brown colour. 



I. Male. — The colour is nearer the warmer red brown of 

 pomonaria although it is not quite so dark. There is no trace of 

 the yellowish brown of zonaria, but, as in that species, the dorsal 

 vessel may be visible. 



The surface is decidedly more polished than in zonaria, and 

 this brightness is a real brightness, not one depending on the 

 suppression of the pitting, for the pitting of helenœ and pomo- 

 naria is substantially the same, and is very little différent from 

 that of zonaria, though perhaps just a little more regular. 



In shape, the pupas are very close to those of zonaria which 

 possesses a pupa stouter and less elongated than poinanaria. 



