PKOTECTIVE RESEMBLANCES IN LEPIDOPTERA 31 



blance attained in Geometra, by a description of the 

 larva of one of our most abundant species the Brim- 

 stone Moth (Rumia cratcegata). The appearance of the 

 larva when seated among the twigs of its commonest 

 food -plant hawthorn is shown in fig. 6. It will be 

 observed that some of the twigs are slightly bent in 

 the middle, and that a projection is placed on the 

 angle; these appearances are exactly reproduced in 



Fio. 6. The larva of FIG. 7.-The hind part of the larva of Brimstone 



Brimstone Moth (Ru- Moth (Rumia cratoegata), seen from right 



mia craiaegatd) ; last side, showing junction with branch adult 

 stage ; natural size. 



the larva. The hind part of the larva is represented 

 in fig. 7 (magnified 4-5 diameters), showing the 

 claspers and the fleshy projections which occupy the 

 furrow between the larva and the stem. 



The harmony of colour is quite as perfect as the 

 resemblance of shape. The smaller branches of the 

 hawthorn are partially covered by a thin superficial 

 layer of a bluish-grey colour (the cuticle), while the 



