TORTRIX. 279 



When at rest the moths extend the fore-wings flat over the 

 hind- wings, which gives the insect somewhat of the shape of a 

 bell ; hence the name. 



The larvae have sixteen legs, and many of them inhabit 

 rolled-up leaves (hence the name Tortrix], while others feed 

 on the seeds or roots of plants, and several infest fruit. The 

 Tortrices are often treated as forming one large compact family 

 (TortricidcR), but some authors have tried to divide them into 

 several. The few species which we have room to notice are 

 therefore noted under their genera, and the families to which 

 they have been referred are merely indicated. 



GENUS TORTRIX. (Tortricida.) 



Tortrix, Linnaeus, Syst. Nat. (ed. x.) i. p. 530 (1758); Poda, 

 Mus. Grsec. p. 93 (1761); Treitschke, Schmett. Eur. viii. 

 p. 45 (1830). 

 The type of this genus is a very common and unmistakeable 



British insect. 



THE GREEN OAK-TORTRIX. TORTRIX VIRIDANA. 

 (Plate CLIV., Fig. I.) 



Tortrix viridana, Linnaeus, Syst. Nat. (ed. x.), i. p. 530, no. 

 203, (1758); id. Faun. Suec. p. 342, no. 1307 (1761); 

 Treitschke, Schmett. Eur. viii. p. 96 (1830) ; Stephens, 

 111. Brit. Ent. Haust. iv. p. 68 (1834); Kirby, Eur. Butter- 

 flies and Moths, p. 412, pi. 61, figs. 18-18 b (1883). 



The Green Oak Tortrix is found in Temperate and Southern 

 Europe. It expands three-quarters of an inch. 



The fore- wings are bright light green, with thecosta narrowly 

 yellowish, and the fringes of the same colour. The hind-wings 

 and abdomen are grey. The head and palpi are yellowish. 



The larva lives on oak and sallow. It is light green, orna- 



