54 . Journal New York Entomological Society. [V'oi. xxv. 



9. Hind tibiae with all spurs. 



Costa arched, Sc and R of hind wing normal Eucestia (=: Chesias'). 



rufata and spartiata (Eur.). 

 Middle of costa straight, habitus of Carsia, Sc and R normal (Anaitis). 



rotundata (Am.) plagiata etc. (Eur.). 

 Hind tibias with end-spurs only, costa nearly straight (Scclidacantlia). 



triseriata and virginata. 

 Palccoctenis from N. Africa is similar with unipectinate antennae. 



10. A development of the gibbocostata group of Staninodcs, known 

 to me only from western North America ; marmorata, odonata, and 

 animata. 



11. Closely related to the typical group of Hydriomena in both 

 general structure and genitalia. 



12. In this variable mass practically every species has some dis- 

 tinctive structure, often confined to one sex, and there is some indi- 

 vidual variation of structure, with the result that a large number of 

 genera have been made. The American and principal Palsearctic 

 species may be analyzed as follows: 



Palpi long, beaklike ; hind tibiae with end-spurs only, with hair-pencil ; Cu; of 

 male hind wing well-developed, lobe small (except in Episauris from 

 N. Africa) fore wing very large with a fine crisp pattern, most often 

 with green. 

 Hind wing with R and Mj stalked in male (Episauris Rbl.). 



kiliani (Canaries and Madeira). 

 R and M^ separate in male only, fore wing marked with green (Acasis 



Dup., Agia Hulst.) viretata (Eur.), viridata (eborata Hulst.). 



R and Mj separate in male, approximate in female appensata (Eur.). 



Palpi slightly exceeding front or short. 



Tibiae with end-spurs only, lobe small, wings not very broad, Cu; developed 

 in male. 

 Hind wings with R and M^ well separated at origin in both sexes. 

 Hind tibiae with hair-pencil (Nycfobia). 



limitata, anguilineata, nigroangulata. 



No hair-pencil (Cladara) atroliturata. 



Hind wings with R and Mi stalked in both sexes, fore wings a little 



broader ; with hair-pencil sertata (Eur.). 



Tibiae with all spurs, R and M^ moderately separate in male, stalked or 

 approximate in female, Cu^ of male rudimentary. 

 Lobe very large, free at tip; with hair-pencil (Lobophora). 



halterata (Eur.), delogramma (Austral.). 

 Lobe very small, truncate. 



Hair-pencil on hind tibia ( Oulobophora Stgr., Philopsia Hulst). 

 intemata and externata (Eur.), nivigerata. 



