AMERICAN LKl'IDOPTKRA. 255 



witli the Geometriiiie in the position of vein 5 in the fore and hind 

 wiiiffs, as well as in other very important particulars. A final ex- 

 ception is Fernaldella, which is immediately distinguished by the 

 absence of vein 5 in the hind wings, thus belonging to the Ennomidse. 



The venation of one genus {Zenophleps) is very peculiar, 6 and 7 

 being stemmed and separate from 8 in the fore wings. It is close to 

 the European genus Oititc/i/sme Hb., and I agree with Mr. Meyrick 

 its appearance is due to the obsolescence of the posterior wall of 

 the second accessory cell. It might very properly be made the basis 

 of a separate subfamily. 



In the Hydriomiuie the tongue is with rare exceptions present. In 

 the fore wings there is generally one inner vein 3 and 4 are separate, 

 and 12 is free. The position and relations of veins 9, 10, 11 and 12 

 are very uniform and unvarying. In the hind wings 3 and 4 are 

 generally separate, and H and 7 stennned. In the description of 

 genera the general form is understood, unless otherwise noted. 



HvDRIOMINiE. 



Synopsis of Genera. 



1. Fore wings 6 and 7 stemmed separate from 8 28. Zenophleps. 



Fore wings 7 stemmed with 8 2 



2. Fore wings 11 veins 22. Catoclothis. 



Fore wings 12 veins 3 



3. Hind tibite with end spurs only 4 



Hind tibia; with middle spurs also 6. 



4. Fore wings with one accessory cell 14. Cjiyniiiovelis. 



Fore wings with two accessory cells 5. 



'x Fore tibije clawed 8. Sceli«lac»ntli». 



Fore tibiie not clawed *>. AgiH. 



6. Fore wings with one accessory cell 7. 



Fore wings with two accessoiy cells 18 



7. .\ntenna? of % bipectinate 8. 



Antennaj of % not bipectinate 10. 



8. Vestiture of wings hairy 39. Fsychopliora. 



Vestitiire of wings scaly 9. 



9. Palpi moderate, scarcely beyond head 17. Veiiusi«. 



Palpi long, much beyond head 43. L.Oxifi<loiiia. 



10. Hind wings of '^ with lobe at base on inner margin 5. PliilopNia. 



Hind wings of T, without lobe at base on inner margin 11. 



11. 9 with wings partly or not at all developed 12. 



9 with wings developed 13. 



12. Segments of abdomen spined 1. Paleaerila. 



Segments of abdomen not spined 2. .ilMiphila. 



13. Clypeus flat 14. 



Clyjieus more or less rounded 15. 



TRANS. .\M. KNT. SOC. XXIII. JULY. 1896. 



