THE CANADIAN ENTOMOLOGIST. 211 



i6. Median spurs of hind tibiae wanting 17. 



Median spurs of hind tibiie present 26. 



17. Anterior tibice unarmed 18. 



Anterior tibij« armed at tip 20. 



18. Antenna; of male simple 19. 



Antennte of male pectinated Leptardia. 



19. Palpi exceeding the front Ecpantheria. 



Palpi not reaching the front Creatonotus. 



20. Inner prong of tibial armour-plate produced into a spine . . 21. 



Inner prong not much produced, spine short 24. 



21. Wings of male with the outer margin upright, of female 



aborted Pachylischia. 



Wings narrow, outer margin somewhat oblique 22. 



22. Costa of primaries convex Seirarctia. 



Costa of primaries straight 23. 



23. Robust, with hairy vestiture, blackish Alexicles. 



Slenderer, the vestiture smooth, white Aloa. 



24. Male and female antenna? simple Phissania. 



Male antennae pectinated, female simple 25. 



Male and female antennae pectinated Estigmerie. 



25. Wings with short erect scales, slightly transparent Diaphora. 



Wings with appressed scales, not transparent Hyphantria. 



26. Antennae of male simple 27. 



Antennae of male pectinated 30. 



27. Vestiture of thorax scaly, appressed 28. 



Vestiture hairy, smooth Pericallia. 



Vestiture hairy, short, erect 29. 



28. Wings broadly trigonate Camptoloma. 



Wings elongate, more rounded Arachnis. 



29. Apex of primaries acuminate Pyrrharctia. 



Apex of primaries square Phragmatobia. 



30. Ocelli close to margin of eye (about the diameter of the ocellus). .31. 

 Ocelli distant from the margin of the eye 36. 



31. Primaries broad, outer margin somewhat erect 32. 



Primaries narrower, outer margin somewhat oblique Alphcea. 



32. Body slender, secondaries ample Diacrisia. 



Body more robust, secondaries moderate 33. 



33. Female wingless Ocnogyna. 



Female with fully-developed wings ,..,.., ,,,...., 34. 



