266 LLOYD S NATURAL HISTORY. 



THE BEAUTIFUL CHINA MARK. NYMPHULA STAGNATA. 



{Plate CLIIL, Fig. i.) 



Pyralis potamogalis, Hubner, Vogel u. Schniett. Taf. 28 



(1792) ; id. Eur. Schmett. vi. fig. 82 (1794). 

 Phahena potomogalis, Schrank, Fauna Boica, ii. (2), p. 62 (1802). 

 Gcometra stagnata, Donovan, Nat. Hist. Brit. Ins. ix. p. 9, 



pl- Z'^2,, % 3 (1800). 

 Nymphiila nyviphaaUs, Treitschke, Schmett. Eur. vii. p. 141 



(1829). 

 Hydrocampa fiy?npJuTata, Stephens, 111. Brit. Ent. Haust. 

 iv. p. 39 (1834). 

 This pretty Moth is a native of Northern Temperate Europe, 

 and Northern Asia, and is common in Britain. It expands 

 from three-quarters of an inch to an inch. 



The wings are white and shining, the fore-wings with two 

 brown stripes extending from the base to beyond the middle, 

 the rest of the surface being reticulated with bands formed by 

 two brown approximating lines. There is a brown marginal 

 line, and the fringes are white. The hind-wings have two 

 brown transverse bands. 



The moth varies in the arrangement of the bands, which are 

 sometimes almost completely obliterated. 

 The larva is said to feed on duckweed. 



GENUS EUDIOPTIS. {Margaroniidce). 

 Eudioptis, Hiibner, Verz. bek. Schmett. p. 359 (1826?); 



Stephens, 111. Brit. Ent. Haust. iv. p. 43 (1834); Moore, 



Lepid. Ceylon, iii. p. 323 (1886). 

 Phakellura, Guilding, Phil. Mag. vii. p. 206 (March, 1830) ; 



id. Zool. Journ. v. p. 263 (June, 1830); Guenee, Spec, 



Gen. Lepid. Delt. et Phal. p. 294 (1854). 

 Phacelhira, Lederer, Wien. Ent. Mon. vii. p. 400 (1863); 



Meyrick, Trans. Ent. Soc. Lond. 1884, p. 297. 



