FVRALIDi:. CATACLYSTA. 39 



appears in June in marshy places, ditches, &c.: very abundantly in some 

 places. 



Very abundant in marshy places within the metropolitan district, 

 especially on the borders of a large pond on Ockham Heath, near 

 Ripley. " Monkswood." — C C Babington, Esq. " York and 

 Newcastle." — W. C HewUsou, E.^fj. " Meldon Park, Prestwick 

 Car, INIarsden, &c." — G. Wdile^; E«q. " Epping." — Mr. H. Duublc- 

 day. '' Cambridgeshire Fens, common/'' — Rev. L. Jenytis. 



B. Labial palpi slender, the terminal johit distinctly exposed, the basal jomts 

 slightly scaly, maxillary palpi also exposed: — Nausinok, Hubncr. 



Sp. 2. Nymphseata. AUs niveis, nitidis, fasciis repandis insolidis subfuscis reti- 

 cidatis, ciliis albissimis, basi cinereis. (Exp. Alar. 9 — 12 lin.) 



Ph. Ge. Nymphfcata. Linni. — Ph. stagnata. Donovan, xi. pi. 363./. 2. — 

 Hyd. Nymphaeata. Steph. Catal. ii. 163. No, 6800. 



AVings glossy snow-white, anterior with the costa at the base to beyond the 

 middle with two brownish lines, and the disc reticulated with similar ones 

 forming insolid fasciae, and leaving large snow-white blotches thereon, 

 with a band of the same near the hinder margin, the latter brownish, and 

 the base of the cilia the same ; the apex of the latter pure white : posterior 

 wings with two transverse insolid fasciae, and a small lunular mark attached 

 to the basal one, the hinder margin and cilia as hi the anterior. 



Also a variable species ; in some examples the reticulated fascisc are solid, 

 and in others their marginal lines only appear, their interior being pure 

 white ; some examples are totally destitute of fasciae or strigcc, having only 

 a faint double line towards the middle of the anterior wings. 



The caterpillar feeds on duckweed {Lemna), and the imago appears about 

 the middle of July in marshy and humid places. 



]Much less abundant than the foregoing species, but far from 

 uncommon within the metropolitan district, in similar situations with 

 that insect. " Cambridgeshire Fens, common." — Rev. L. Jenyns. 

 " Meldon Park, Marsden, Prestwick Car, &c." — G. Wa'des, Esq. 

 " Epping." — Mr. H. Doiibleday. " Alderley, Cheshire." — Rev. 

 E. Stanley. 



Gexus CCLXV. — Cataclysta, Hubner. 



Palpi short; maxillary minute; labial remote, slender, ascending, clothed 

 with short scales, the terminal joint distinct; triarticulate, the apical joint 

 nearly as long as the second and subulate : maxillw rudimentary. Antenna 

 short, somewhat denticulated towards the apex, not pectmatcd, faintly 



