500 TORTRICINA [HEMIMENE 



with costal fold ; terrnen slightly sinuate. Hindwings : 3 and 

 4 connate, 5 parallel to 4, 6 and 7 remote at origin, tolerably 

 parallel. 



A rather small northern temperate genus ; some of the 

 more obscure species require careful attention for their discri- 

 mination. 1 All the larvae feed in roots or shoots of Compositae. 



1. Fore wings with dorsal blotch yellow or orange- 



tinged . 2. 



not yellow or orange- 



tinged . 5. 



2. Dorsal blotch distinctly orange . . .3. 



not orange . . . .4. 



3. Dorsal blotch distinct, clear orange . 2. alpinana. 



obscure, tinged with orange 1. alpestrana. 



4. Dorsal blotch rather broad, yellow 3. quaestionana. 



,, narrow, whitish-yellow 4. petiverella. 



5. Dorsal blotch ochreous-whitish . . 5. sequana. 



not whitish . . .6. 



6. Costal fold reaching J- . . .7. 



,, reaching f 



7. Forewings purplish-tinged, costa straighter 



8. acuminatana. 

 not purplish-tinged, costa more arched 



9. tanaceti. 



8. Dorsal blotch straight-edged, without darker streak 



6. simpliciana. 

 sinuate-edged, enclosing darker streak 9. 



9. Forewings greenish-tinged, costal white strigulae 



conspicuous . 11. plumbagana. 



not greenish, costal strigulae incon- 



spicuous . . .10. 



10. Dorsal blotch moderately broad; expanse 13-15 mm. 



10. senectana. 



narrow; expanse 9-13 mm. 7. consortana. 



1. H. alpestrana, HS. 11-14 mm. Forewings dark fuscous, 

 posteriorly irrorated with orange -ochreous, costa posteriorly 

 strigulated with whitish ; an oblique transverse ill-defined paler 

 orange -tinged -median dorsal blotch, including some darker 

 central strigulae ; some indistinct blackish marks in disc ; two 



1 I am much indebted to Mr. J. Hartley Durrani for communicating 

 to me his conclusions on the synonymy of this genus (which has been 

 rather confused than elucidated by recent writers), together with a series 

 of named types ; I have been able to assent fully to his views. 



