Lepidoptera of New York axd Neighboring States 575 



( Larvae ) 

 1. Aquatic. 



2. Without tracheal gills. 



3. Case ovate, on Lemna 51. Elophila. 



3. Case sharp-edged, on other plants 50. Nymphula. 



2. With simple tracheal gills, under a web on rocks 51. Elophila. 



2. With branching tracheal gills, in a floating case 



50. Nymphula (Parapoynx). 

 1. Terrestrial, on nettle 54. Eurrhypara. 



50. NYMPHULA Sckranck 



(H yd roc am pa Latreille, Parapoynx Hiibner, Paraponyx auct., Oligo- 



stigma Guenee, etc.) 



Palpi obliquely upturned, with second joint well set off and rather broadly 

 scaled, third conical, much slenderer, and nearly as long (fig. 348); maxillary 

 palpi rough-scaled, and truncate at tip or triangular; large, except in N. ekthlipsis ; 

 tongue not very strong; ccelli small, but present. Antennae usually annulate, 

 with the outer row of scales on each segment raised; legs long and slender. 



Fore wing (fig. 346) with Rj free, R, usually stalked, free in odd specimens of 

 several species; R 5 free, divergent: hind wing with Sc and R fused a considerable 

 distance, the other veins free; M 2 and M 3 approximate at base. Sexes often 

 strongly dimorphic in size and markings. Female with exserted ovipositor. 



Caterpillar aquatic, in a case, or under a piece of a leaf cut out and attached 

 to the surface of the leaf (when a case is made, it is of two pieces of leaf, and 

 has sharp edges ) . Larva often with branched tracheal gills, and breathing water. 

 Pupa in the case, which is more heavily lined with silk than while used by the 

 larva, and in the species whose larvae breathe water, is emptied of the water. 



Key to the species 



1. Hind wing wholly white, or with one or two faint lines. 

 2. Fore wing yellow or brown, markings on hind wing more distinct. 



4. gyralis, in part. 

 2. Fore wing mouse gray, or white, or gray and white with a contrasting 



pattern; hind wing usually immaculate 5. maculalis. 



1. Hind wing with diffuse gray lines, with diffuse grayish discal spot. 



4. gyralis, in part. 



1. Hind wing with two fine, closely parallel, wavy black lines 9. allionealis. 



1. Hind wing with two even and parallel mesial bands. 



2. Fore wing dominantly white 8. badiusalis. 



2. Fore wing coppery and gray, with broad even white postmedial fascia. 



6. seminealis. 

 2. Fore wing dull fuscous brown, with a narrow wavy postmedial white 



line . 7. ooscuralis. 



2. Fore wing largely coppery, with obscure pale postmedial band, or none; 

 with four black enlarged dots on outer margin of hind wing. 



6. seminealis $. 

 1. Hind wing with two irregularly waved black lines, with a yellow discal 

 spot between them. 



2. Discal spot edged with black 1. ekthlipsis. 



2. Discal spot not dark-edged 2. icciusalis. 



1. Hind wing blackish with obscure markings 3. obliterans. 



