60 LEPIDOPTERA. 



tinues fresh, and generally it sinks a little within the latter; 

 it is not till after the above-mentioned furrow has been ex- 

 cavated that the chlorophyll of the other parts of the inner 

 wall of the cone is eaten in an irregular manner, and not to 

 any great depth. The larva collects its excrement in a heap 

 at the lower end of the cone. If its habitation be opened, 

 the larva coils itself up like a A"bc^Ma-larva, which is 

 another peculiarity by which the larvae of this genus can be 

 distinguished from other Tortrix-larviQ. 



The change to the pupa state takes place in a slight white 

 cocoon, between leaves, and when the imago is excluded, the 

 pupa protrudes more than the half of its length from this 

 cocoon. 



Now, much as the larvjB of the individual species of 

 Sciaphila resemble one another in their modes of life and 

 in their appearance, yet are there some apparently insignifi- 

 cant, but nevertheless constant characters, by which the larvae, 

 for example of Sc. minuscidana and Wahlbomiana^ maybe 

 easily and certainly distinguished from each other; and even 

 the larvce of the varieties of Wahlhomiana, as far as I have 

 been able to observe them, have their small, but constant, 

 differences, when one has once thoroughly learnt their 

 characters, by which they can be more easily and certainly 

 recognized than the perfect insects themselves, which in 

 reference to colour, markings, size, and especially the form 

 of the wings, offer so many transitional forms, that one can 

 only look upon them as varieties, and not as distinct species, 

 in spite of the constant differences in the larv«. 



In the pupae also of the Sciaphilce, we can find small, 

 though only unimportant, differences. 



After these preliminary remarks, let us now consider more 

 in detail the larva3 of the individual species of Sciaphila. 



