28 PROCEEDINGS OF THE NATIONAL MUSEUM vol. lie 



19. Harpes compound 20 



Harpes simple 21 



20. Sacculus with prominent bifurcate lobe. 



(Genus Mothonica Walsingham) 1. Mothonica kimballi, new species 

 Sacculus a large JBeshy lobe . . (Genus Menestomorpha Walsingham) 



1. Menestomorpha oblongata (Walsingham) 



21. Uncus reduced (Genus Stenoma Zeller) 22 



Uncus large, tapering, curved ventrad, lying parallel to gnathos. 



(Genus Menesta Clemens) 23 



22. Aedeagus large, flared apically; cornuti two clusters of very heavy spines. 



1. Stenoma mistrella Busck 

 Aedeagus small, broad; cornuti one small cluster of heavy spines. 



2. Stenoma crambitella Walsingham 



23. Cornuti consisting of two heavy spines. 



1. Menesta tortriciformella Clemens 

 Cornuti consisting of one heavy spine. . . 2. Menesta melanella Murtfeldt 



24. Anterior apophyses fused to genital plate or very reduced. 



(Genus Aniaeotricha Zeller) 25 

 Anterior apophyses free, well developed 37 



25. Corpus bursae with signum 28 



Corpus bursae without signum 26 



26. Corpus bursae corrugated, genital plate bandlike. 



15. Antaeotricha manzanitae Keifer 

 Corpus bursae not corrugated, genital plate not bandlike 27 



27. Genital plate reduced, lamella antevaginalis and postvaginalis not differenti- 



ated, ductus bursae short, sclerotized, corpus bursae small. 



4. Antaeotricha leucillana (Zeller) 



Genital plate well developed, lamella antevaginalis small, forming triangular 



flap over ostium 12. Antaeotricha haesitans (Walsingham) 



28. Genital plate reduced to simple band, signum with single large spine . . 29 

 Genital plate more complex, signum a small- to large-toothed plate . . 32 



29. Anterior apophyses fused to genital plate. 



11. Antaeotricha thomasi (Barnes and Busck) 

 Anterior apophyses small, not fused to genital plate 30 



30. Ostium bursae with a pouchlike evagination between ostium and inception 



of ductus seminalis . . 13. Antaeotricha fuscorectangulata, new species 

 Ostium bursae without such an opening 31 



31. Genital plate excavated along posterior margin, ductus bursae short. 



10. Antaeotricha agrioschista (Meyrick) 

 Genital plate not excavated, ductus bursae long. 



9. Antaeotricha humilis (Zeller) 



32. Ostium opening near center of genital plate 33 



Ostium opening near anterior margin of genital plate 36 



33. Ductus bursae sclerotized from midpoint to corpus bursae 



8. Antaeotricha irene (Barnes and Busck) 

 Ductus bursae not sclerotized 34 



34. Posterior margin of genital plate cleft medially. 



5. Antaeotricha osseella (Walsingham) 

 Posterior margin of genital plate not cleft 35 



35. Genital plate with median T-shaped process extending over ostium. 



3. Antaeotricha unipunctella (Clemens) 

 Genital plate without process 14. Antaeotricha vestalis (Zeller) 



