78 Journal New York Entomological Society. [Vol. xiv. 



Hind wings with the outer margin excised before anal angle. ...Ambia. 

 Hind wings with the outer margin even. 



Outer margin straight Elophila . 



Outer margin convex Geshna. 



Maxillary palpi long; dilated with scales at extremity. 



Hind wings with the outer margin evenly rounded Nymphula. 



Hind wings with the outer margin excavated below apex..01ig0stigma. 



Palpi with the third joint short and blunt Piletoceia. 



Palpi porrect. 



Hind wings with vein 4 absent Diathrausta. 



Hind wings with vein 4 present. Steniodes. 



Genus NYMPHULA Schrank. 



Nvmplntla Schrank, Fauna Boica, ii, 162, 1802. 

 Hydrocampa Latreille, Fam. Nat., 478, 1825. 

 Paraponyx Hiibner, Verz. bek. Schmett., 362, 1827. 

 Syndita Lederer, Wien. ent. Mon., 1863, 448. 

 Nymphaella Grote, No. Am., Ent., i, 97, 1880. 

 Hygraula Meyrick, Trans. N. Zeal. Inst., xvii, 129, 1885. 

 Hydeuretis Meyrick, Trans, ent. soc. Lond., 1895, 435. 



Palpi upturned, the second joint moderately fringed with hair in front and reach- 

 ing vertex of head, the third well developed and acuminate; maxillary palpi long 

 and dilated with scales at extremity ; frons rounded : antennae usually annulated ; 

 ocelli usually prominent ; legs long, the tibia; usually smooth with the spurs almost 

 equal. Fore wings with veins 3, 4, 5 from angle of cell ; 7 straight and well sepa- 

 rated from 8, 9, 10 ; 10 usually stalked. Hind wing with the cell about half the length 

 of the wing ; veins 3, 4, 5 from angle ; 6, 7 from upper angle ; 7 strongly anastomos- 

 ing with 8 (Hampson). 



Synopsis of Species. 

 Hind wings white, the median lines obsolete. 



Sexes usually dimorphic, the male with spots on forewing, the female uniformly 



dark gray maculalis. 



Hind wings with dark lines, usually distinct, at least traceable, or all dark. 

 Hind wings with the central fascia even and parallel. 



Hind wings with the central fasciae approximate, wavy allionialis. 



Hind wings with the central fasciae remote, straight. 



Fore wings shaded with brown ; outer median band of hind wing 



broad obscuralis. 



Fore wing white ; mesial bands of hind wing alike badiusalis. 



Hind wings with central fasciae irregular, divergent centrally or lost. 

 Lines of hind wing indistinct, clouded. 

 Wings obscured by dark gray. 



Discal spot white, contrasted obliteralis. 



Discal spot metallic gray, obscure nomophilalis. 



Hind wing white, the lines faint gyralis. 



Lines of hind wing well marked. 



