46 WILLIAM T. M. FORBES 



9. Fore wing with only one anal reaching margin, 1st A rudimentary, or repre- 

 sented by a fold; 3d A at most by a short spur 17 



10. Antennae strongly clubbed; Sc and R strongly divergent from close to base 



Castniidae 



10. Antennae tapering regularly, or very slightly fusiform 11 



11. Sc separating from cell shortly before the apex of the cell (figs 62, 72) 16 



11. Sc arising separate from R, running closely parallel to it to well beyond end 



of cell, or (in our species) fused with it beyond end of cell; the base of R 

 in that case either complete or showing as a short spur (fig. 298) 



Pyralididae (Schoenobiinae) (p. 525) 



11. Sc anastomosing with cell for short distance or not at all; not closely parallel 



to R beyond end of cell 12 



12. Accessory cell well marked 13 



12. Accessory cell absent 14 



13. Wings ample (fore wing not half longer than wide), body short and slender; 



mouth parts rudimentary Dalceridae 



13. Wings strong and lanceolate, body heavy, far exceeding hind wings, mouth- 

 parts rudimentary Cossidae (p. 516) 



13. Wings more or less oblong, usually twice as long as wide, and lightly veined; 



body small and slender; mouth parts usually developed, with scaled 

 tongue Micros in part . . 59 



14. Fore wing with 1st A and 2d A anastomosing or connected near middle of 



wing ( fig. 101 ) Psychidae in part (page 140) 



14. Fore wing with 1st A and 2d A independent beyond extreme base of wings . . 15 



15. Fore wing with R B running to outer margin, base M distinct, running through 



center of cell; Sc and R of hind wing connected by a strong cross vein or 

 anastomosing; tongue absent Eucleidae (p. 102) 



15. Sc and R of hind wing independent; or connected by a cross vein, when RB runs 



to costa (Ethmia) ; or anastomosing when base of media of fore wing 

 runs near lower edge of cell or is completely lost (Tortricidae) ; tongue usually 

 present Micros in part . . 59 



16. R B long-stalked (fig. 72), colors light, the northern species with crinkly hair 



on fore wing ; tongue absent Megalopygidae (p. 101 ) 



16. Rj from cell (fig. 61) dark, smoothly scaled forms; tongue present. 



Pyromorphidae (p. 113) 



17. Hind wing with three anals, the first often fading out toward base (fig. 19) . .18 



17. Hind wing with two anals or less; at most with a short spur of 1st A at 



margin in broad-winged forms (figs. 409-432) 19 



18. Sc and R of hind wing closely parallel or fused beyond end of cell (figs. 312- 



399 Pyralididae in part (p. 523) 



18. Sc and R strongly divergent from before end of cell Micros in part. .59 



19. Antennae distinctly swollen toward tip, (figs. 5-7), and frenulum wanting 



(butterflies) 20 



19. Antennae not swollen toward tip, or if so (Agaristidae, Sphingidae, Coronidiinae ) , 



wings with a strong frenulum 25 



20. Fore wing with all veins present, from cell, eyes strongly lashed in front; 



antennae separated at base by a distance greater than half width of 

 eyes Hesperiidse (p. 43) 



20. Fore wing with some radials stalked or absent; eyes rarely lashed; antennae 



closer together 21 



21. Fore wing with 3d A free at tip, hind wing with only one anal, save in one 



Mexican species Papilionidae (p. 44) 



21. Hind wing with two well-developed anals; 3d A of fore wing running into 



2d A or lost 22 



22. M, from middle of end of cell in both wings, or obsolete; fore wing, in north- 



ern species, with ten or eleven veins 23 



