THE LARGE MARCLED TGRTRIX. 



[47 



brown forms are sometimes tinged with green. In the illustra- 

 tion some of the more usual forms of marking are shown. 

 I (more or less typical) and 2 are the most common ; 5 

 it-amosana) is less frequently met with ; 4 {ilicanus) has ashy 

 brown fore wings with a black bar at the base, three black dots 

 on the disc, and a series of black dots before the outer margin, 

 the triangular marking on the front margin is reddish ; 3 is a 

 modification of the typical form approaching var. dilutana; 6 is 



Fig. 23. 

 Larg-e Marbled Tortrix. 



of the afzeliamis form, with shiny brownish fore wings and 

 black markings. 



The caterpillar is green with whiter ring divisions ; a few 

 long whitish hairs on each segment ; a faintly darker line along 

 the back, and a paler interrupted line along the sides. Head 

 yellowish green marked with brownish and sparsely clothed 

 with whitish hairs. It feeds in June and July on the leaves of 

 oak and sometimes on sallow. It spins a whitish boat-shaped 

 cocoon on the under side of an oak leaf or twig, and therein 

 turns to a pale green chrysalis with a broad purple brown stripe 

 along the back from the head ; the blunt last ring is tinged 

 with purplish brown and the edge of the ring immediately 

 before it is fringed with minute hooks (Plate 72, Figs. 4, ^d). 



The moth seems to be out from August to April. It may be 



