ACKONYCTIN^. 13 



b^. Thorax clothed with hair and hair-like 



scales Parateaciiea, p. 21(5. 



/s. Prothorax with spreading crest, meta- 



thorax with divided crest Polyph^nis, p. 667. 



ff^. Prothorax with long oblique flattened 

 crest. 



a6. Metathorax with divided crest Papaipema, p. 



56. Metathorax with spreading crest Ogdoconta, p. 



h^. Pro- and metathorax with spreading 

 crests. 

 a^. Thorax clothed chiefly with scales, 

 a7. Fore wing with slight scale-tooth at 

 tornus. 

 a^. Abdomen with long forked crest on 



2nd segment Argyrostrotis, p. 517. 



b^. Abdomen without forked crest on 

 2nd segment. 

 a9. Fore wing with the termen more 

 or less angled at vein 4, then 



oblique Eriopus, p. 531. 



69. Fore wing with the termen angled 



at vein 3, then dentate Cosmodes, p. 



c^. Fore wing with the termen evenlj' 



curved, dentate Data, p. 526. 



b'. Fore wing without scale-tooth at 

 tornus. 

 ftS. Palpi with the 3rd joint porreot. 

 «». Palpi with the 2nd joint reaching 



vertex of head, the 3rd long Angara, p. 219. 



b^. Palpi with the 2nd joint reaching 

 about middle of frons, the 3rd 

 short. 

 «io. Abdomen with large dorsal crest 



on 3rd segment Telesilla, p. 5S7. 



^10. Abdomen with the dorsal crests 



slight Andropolia, p. 



68. Palpi with the 3rd joint upturned. 

 ftS. Palpi with the 3rd joint long and 



dilated at extremity Cropia, p. 260. 



b^. Palpi with the 3rd joint very long, 

 not dilated, in male tufted with 

 long hair on inner side and re- 

 curved over head Coeythurus, p. 360. 



c9. Palpi with the 3rd joint shorter 

 and not dilated. 

 a^°. Fore wing with the cilia strongly 



dentate towards tornus Perigeodes, p. 287. 



610. 'Pore wing with the cilia slightly 

 crenulate. 

 all. Palpi with the 2ud joint reach- 

 ing vertex of head. 

 ai2. Abdomen with very large 

 crests on 3rd and 4th seg- 

 ments ; build slender Chytonix, p. 600. 



6'-. Abdomen with the crests on 

 medial segments equal ; build 

 stout. 

 0.13. Thorax and fore wing roughly 



scaled Heterochroma, p. 271. 



^i3_ Thorax and fore wing smoothly 



scaled Perigea, p. 292. 



