LEPIDOPTERA OF NEW YORK AND NEIGHBORING STATES 383 



a. Hind wing with M, and Cu t connate, M 2 strongly curved and approxi- 

 mate to Ms+CUj at base; thorax crested; inner margin of hind 

 wing sexually modified; male without costal fold; hind tibia 

 almost always with a hair pencil at base. 

 6. Inner margin of hind wing with a thickened free lobe. 



31. Cymolomia. 

 6. Inner margin of hind wing with a more or less distinct fold and 



hair pencil. 

 7. Hind metatarsus of male with a tuft above .... 30. Phsecasiophora. 



7. Hind metatarsus of male smooth scaled 29. Olethreutes. 



5. Hind wing with M 3 and CUj stalked or united; M 2 strongly curved 

 and approximate to their base; thorax rarely crested; male often 

 with costal fold, but rarely with other sexual modifications. 

 6. Fore wing with, M 3 and M 2 connate; M 2 straighter than usual; 



no costal fold 28 20. Rhyacionia. 



6. Fore wing with M 2 separate at origin from M 3 and curved. 

 7. Male antenna with a notch near base. 



8. Fore wing with a large raised scale-tuft in fold. 



17. Strepsicrates. 

 8. Fore wing smooth. 



9. Costal fold present Griselda (p. ) . 



9. Costal fold absent 16. Spilonota. 



7. Male antenna without a notch. 



8. Black sex-scaling toward costa of hind wing above. 



21. Proteoteras. 



8. No black sex-scaling on costa of hind wing. 

 9. Male with costal fold. 



10. Sc absent 14^. Hendecaneura. 



10. Sc present... 7. Epinotia, 13. Epiblema and 14. Eucosma. 29 

 9. No costal fold. 



10. Outer margin of fore wing evenly excurved; the veins 



evenly spaced. 

 11. Uncus slender, sometimes bifid at tip. 



7. Epinotia, in part. 



11. Uncus rudimentary 25. Zeiraphera. 



10. Outer margin concave toward costa; M 3 somewhat up- 

 curved toward margin; apex often with an ocellate 

 black dot, making the apex appear more falcate than 

 it is; Rj normally arising from cell before com- 

 mencement of accessory cell. 



11. Hind wing with R and M t stalked 24. Gypsonoma. 



11. Hind wing with R and Mj approximate 10. Norma. 



10. Outer margin more or less distinctly notched near mid- 

 dle; M 3 strongly curved up to margin. 

 11. Fore wing with more or less distinct raised scale- 

 ridges 22. Gretchina. 



11. Fore wing smooth-scaled. 



7. Epinotia, 15. Thiodia, 23. Exentera. 10 



28 In occasional specimens Mg and MS are perceptibly separate ; they can generally 

 be distinguished by the palpi, which have the vestiture of the second joint abruptly cut 

 off at the end; the third joint well denned and projecting free (fig. 283). 



29 For a key to these species see Eucosma. 



so These genera are distinguished only by the male genitalia. For a key to the species 

 that may run here, see Thiodia. 



