10 TORTRICINA. 



FAMILY I. TORTRICIDJE. 



The genera comprised in this division are twelve in number, 

 of which the larvae feed almost entirely in folded, rolled, or 

 united leaves, and chiefly assume the pupa state in a loosely- 

 spun cocoon or web (except Sarrothripa) of silk. 



In the imago, the anterior wings are ample, their length seldom 

 exceeding twice the width ; and in several genera, particularly 

 in Tortrix, with the costa considerably dilated towards the base, 

 but never folded. The posterior wings are ample, ovate, and 

 slightly concave or emarginate below the apex. 



The twelve genera are thus tabulated : 



A. Anterior wings with the costa roughly 

 clothed with scales at the base and apex, and 

 slightly incised in the middle. 



a. Palpi with the apical joint very long. 



a a. With the middle joint as long as 



the apical 1. SARROTHRIPA. 



B. Anterior wings with the costa rounded at 

 the base, or regularly arcuated, and without 

 the rough scales at the base and apex. 



b. With the antennae pectinated in both sexes, 

 mostly so in the <$ . 



c. Palpi having the middle joint five times 



as long as the apical 2. AMPHISA. 



b b. With the antennae setaceous, subserrate 

 and plumose. 

 c c. Palpi having the middle joint four 



times as long as the apical .... 3. HYPERMECIA. 

 bbb. With the antennae setaceous, and only 

 hirsute beneath in the c? , and simple, or 

 nearly so, in the $ . 



ccc. Palpi with the middle joint twice as 

 long as the apical. 

 d. With the apical joint twice the length 



of the basal 10. (ENECTRA. 



d d. With the apical joint half the 



length of the basal 8. SIDEREA. 



cccc. Palpi with the middle joint three 



times as long as the apical .... 9. DICHELIA. 

 ccccc. Palpi with the middle joint more | 11. CLEPSIS. 

 than three times as long as the apical . J 12. TORTRIX. 

 c c cccc. Palpi with the middle joint four 

 times as long as the apical. 



c. With the apical joint not so long as 1 4. EULIA. 

 the >>asal . . I 6. ANTITHESIA. 



