op.nix] TINKIDAE 747 



1. 0. guttea, Hw. 10-12 nun. Head brownish -oehreous. 

 Forewings dark fuscous; four costal and two dorsal subtriangular 

 spots ochreous-wbite. Hindwings dark fuscous. 



England to Durham, rather common ; C. Europe ; 5, 6. 

 Larva yellowish; dorsal line rather dark green or reddish; 

 head black-hrown : within folded leaves of apple ; 7, 8. 



2. 0. loganella, Stt. 9-11 mm. Head grey mixed with dark 

 brown. Palpi white. Forewmgs blackish-fuscous ; numerous 

 costal strigulac, a spot in disc posteriorly, and two dorsal spots 

 white ; a black apical dot ; cilia fuscous, terminal half white 

 except on tomus, with a black subapical line. Hindwings dark 

 grey. 



Hereford, York to Sutherland, local; not recorded else- 

 where ; 5. Larva pale green ; dorsal line darker ; head 

 brown ; 2 with four black spots : within folded leaves of 

 birch; 8. 



3. 0. hetulae, Stt. (acutoilatdla, Stt.) 9-10 mm. Head 

 fuscous, more or less mixed with white. Palpi white, some- 

 times with dark fuscous subapical ring. Eorewings grey, 

 irrorated with dark fuscous and white ; numerous costal 

 strigulae, a spot in middle of disc and another posteriorly, 

 and two dorsal spots white ; a blackish apical spot ; cilia with 

 two dark fuscous lines, tips round apex white, beneath apex 

 with a third dark fuscous line. Hindwings grey. 



England, common ; N. and 0. Europe ; 5, 8. Larva whitish- 

 green ; dorsal line dark green ; head brownish ; 2 with four 

 black spots: within folded leaves of birch; 7, 9, 10. 



4. 0. scoticella, Stt. 9-10 mm. Head whitish, mixed with 

 fuscous. Palpi white. Eorewings dark fuscous, towards base 

 irrorated with white ; numerous costal strigulae, a spot in disc 

 posteriorly, and two dorsal spots preceded hy blackish spots 

 white; a black apical spot, anteriorly white - margined ; cilia 

 with three entire dark fuscous lines. Hindwings grey. 



Britain to Sutherland, N. Ireland, local, commoner north- 

 wards ; Germany, Switzerland ; 5, 6. Larva pale yellow-green ; 

 dorsal line dark green or red-brown ; head pale brown ; 2 with 

 four black spots : within folded leaves of Pyrus aucuparia and 

 P. aria ; 8, 9. 



5. 0. torcnrillella, Z. 9-10 mm. Head pale oehreous mixed 

 with fuscous. Palpi white. Forewmgs rather dark fuscous, 

 purplish-tinged, towards dorsum and costa more blackish; 

 numerous costal streaks, a spot, in disc posteriorly, and two or 

 three dorsal spots white ; a black apical dot, strongly white- 



