4 JoLRXAL Xew York Entomological Society, tvoi. xxii. 



7. Hair on the thorax all erect, bristling, and with spoon-shaped tips, 



Xanthopastis (4). 



Vestiture rarely erect and bristling, and if so with the tips not 



enlarged 8. 



8. \\'ith a high conical tuft on vertex, eyes lashed Stretchia. 



No conical tuft between antennze 9 



9. Eyes strongly lashed in front as well as behind 10. 



Eyes not lashed in front, and weakly if at all behind 11. 



10. Vestiture loose, hairy Lasiestra (5). 



Vestiture normal, mixed Xylotniges. 



11. Thorax with fine hairy vestiture, and abdomen with strong normal tuft- 



ing Nephelodes. 



With coarser vestiture or nearly untufted abdomen 12. 



12. Female antennse pectinate (wings usually less than twice as long as wide, 



thorax with a pyramidal crest in front, often with contrasting white 



reniform Tricholita. 



Female, and often male, antennae simple ; wings usually more than twice 

 as long as wide, thorax rarely with pyramidal crest ; rarely with a 

 contrasting white mark in reniform 13. 



13. Abdomen with several dorsal tufts 14. 



Abdomen with a single basal tuft or none 15. 



14. Fore wing with R3 and R4 stalked more than halfway from tip of accessory 



cell to apex, with strongly oblique outer margin .... Morrisonia (6). 

 Fore wing with R3 and R^ shortly stalked, with more erect outer margin, 



Mamestra (7). 



15. Vestiture of simple hair, no tufts whatever . . Leucania (typical) (8) (9). 

 Vestiture of narrow strap-shaped flattened hair; mostly rather slender 



species, longitudinally striate Leucania group Borolia (8). 



Vestiture mixed, of various widths of serrate flattened hair, or if almost 

 entirely of hair with distinct basal abdominal tuft 16. 



16. Front rough and projecting half the width of the eyes or with heavy 



spines on outer side of first joint (metatarsus) of fore tarsus, 



Mamestra (7). 



Front smooth, not projecting more than a third the width of the eyes, 



spining of fore tarsus normal 17. 



17. Abdomen with a more or less distinct basal tuft 18. 



Abdomen wholly untufted 22. 



18. Fore wing oblong, the anal angle so retracted that the part of the outer 



margin from (Z\u to A is parallel to the base of the costa, 



Crocigrapha (10). 

 Fore wing broadening more toward outer margin, the anal angle less 

 retracted, the margin between the tips of Cu, and A, belonging dis- 

 tinctly to the outer margin 19, 



19. M, of hind wing stalked with R about a fifth way to the margin, wings 



long and narrow, powdery, hind wing notched opposite cell Xylomiges. 

 M, free, from cell or obscurely stalked 20. 



