THE LARGE 1IARBLED TORTRIX MOTH. 145 



Twisters, on account of the mode in which their 

 larvae generally feed, rolling up the leaves of 

 various plants, and living within the con- 

 torted leaf. 



The first example of the Tortrices that we 

 shall take is the LARGE MARBLED TORTRIX 

 (Sarcothripa revayana), a figure of which is given 

 on Plate XL fig. 2. 



A glance at the figure will show how appro- 

 priate is the popular name of this insect, for it is 

 not only larger than the generality of Tortrices, 

 but the wings are beautifully marbled. Like 

 many of the Tortrices, it is exceedingly variable, 

 at least twelve distinct varieties being known to 

 entomologists. The colours of the upper wings 

 are always different shades of brown intermingled 

 with whitish grey. 



The caterpillar of this Moth feeds on the sallow, 

 and the perfect insect is on the wing throughout 

 the greater part of the summer and autumn. 



JSext come some examples of the typical 

 genus. On Plate XI. fig. 1, is seen the HAZEL 

 TORTRIX (Tortrix sorbiana), an insect which may 

 be considered as the typical species of the whole 

 group. The upper wings are yellowish brown, 

 and the markings are dark brown, while the 

 lower wings are simply brown. In this, as in 



L 



