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 

 {TortricidcB), 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. {Tortricidcs) 



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

 Mus. Gra2c. p. 93 (1761); Treitschke, Schmett. Eur. viii. 

 p. 45 (1830)- 

 The type of this genus is a very common and unmistakeablo 



British insect. 



THE GREEN OAK-TORTRIX. TORTRIX VIRIDANA. 

 [Plale 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- 



