ntmphula] PYRAUSTIDAE 403 



Britain to the Clyde, Ireland, common ; N. and C. Europe, 

 N. Asia ; 6, 7. Larva bright yellow or brownish-yellow ; dorsal 

 line dark brownish ; head pale bi'own : amongst spun leaves of 

 Hparganium, below surface of water ; 8-5. 



2. N. stratiotata, L. 20-25 mm. Forewings pale ochreous- 

 brownish, sometimes partly suffused with white in disc ; lines 

 white, first indistinct, postei'iorly partly edged with dark brown, 

 second sinuate, anteriorly sufFusedly edged with dark brown ; a 

 white discal spot, edged with dark fuscous ; a white subterminal 

 streak. Hindwings white; a thick dark fuscous postmedian 

 line ; a fine dark siibterminal line ; termen yellow-tinged. 



England to York, Ireland, common ; C. Europe ; 6-9. Larva 

 with eight series of groups of fleshy filaments, serving as 

 branchiae ; whitish-ochreous or pale greenish, slightly purplish- 

 freckled ; dorsal line rather dark grey ; head pale brown : in a 

 web amongst leaves of Potamogeton, Anacharis, CeratophyUum, 

 etc., below surface of water ; 7-5. The larva continually 

 imdulates the body rapidly for about twenty seconds, at 

 intervals of from one to three minutes, a movement connected 

 with respiration. 



6. Hydrocampa, Latr. 



Antennae |. Labial palpi ascending, second joint with pro- 

 jecting scales beneath, terminal slender, somewhat pointed. 

 Maxillary palpi loosely scaled, pointed. Tibial outer spurs -|. 



A small European genus. Larva aquatic, at first mining 

 leaves. 



1. H. nymphaeata, L. 23-30 mm. Forewings varying from 

 yellow-ochreous to rather dark fuscous ; basal area with dentate 

 white and dark fuscous lines ; a white subcostal spot before 

 first line ; lines whitish, obscure, dark-margined, first angulated 

 above middle, second with deep abrupt sinuation inwards below 

 middle ; median band almost occupied by three white dark- 

 edged blotches ; an irregular interrupted white dark-edged and 

 dark-veined subterminal streak. Hindwings as forewings, but 

 base white, median band white except discal spot, second line 

 less sinuate. 



Britain to Caledonian Canal, Ireland, common ; C. Europe, 

 WC. and N. Asia ; 6-8. Larva light brownish ; dorsal line 

 darker ; head light brown ; plate of 2 black-edged : in flat oval 

 floating cases of leaf-fragments, on Potamogeton, Hydrocharis, 

 Sparganiv/m, etc. ; 7-6. 



