AND THEIR TRANSFORMATIONS. 97 



Species 2. — Hydrocampa nymph^ata ' — (Plate LXXVI., Figs. 21, 22, 23) — Varies from |. to 1 inch in 



expanse ; wings white, divided into numerous large patches by brown (generally duplicated) lines, the space „fc»-.<w^ 



between the latter being paler brown ; hind wings with the base, and a broad central fascia (in which is a brown 



patch) of white ; apical margin of all the wings with an entire white fascia. Some specimens of the moth are 



almost entirely white, with the brown markings almost obliterated. The caterpillar feeds on duckweed ; and 



the moth appears in July, in damp situations, and is very common. 



' Sysonymes. — Pltalmna Geometra nympltaata, Linnaeus ; | Phaliena stagnata, Donovan, xi., pi. 362, f. 2. 

 Haworth ; Stephens ; AVood, fig. 800. 1 Pyralis potamogalisj Hiibner. 



CATACLYSTA, Hubner. HYDROCAMPA, pars, Curtis. 

 The labial palpi in this group are slender, recurved, and not thickly clothed with scales ; the maxillary palpi 

 minute ; the spiral tongue almost obsolete ; and the singular row of pearly dots on a black ground, along the 

 margin of the hind wings, distinoTiish this genus from the other China-marks. 



"0'=' 



Species 1. — Catacltsta lemnataJ — (Plate LXXVI., Figs. 24, 25) — Measures from f to 1 inch in 



expanse ; fore wings of the male white, of the female pale ashy-brown, slightly marked with transverse shades ; 



hind wings white, rather dusky at the base, slightly strigose, and with the apical margin in both sexes black, 



with silvery dots ; the fore wings in the female are considerably more elongated than the males. The caterpillar 



feeds on duckweed, forming cases like those of the preceding genus. The moth appears in the summer months, 



in most places, and is very common. 



'Synonyhes. — Phalcena Geometra lemnata, Limiaeus ; Hiibner; Donovan, 8, pi. 266, fig. 1 ; Haworth ; Stephens; Wood, fig. 801, 

 Harris, Aurelian, pi. 7, fig. 1. Phalcena uliginaia, Fabricius (female). 



PARAPONYX, HuBNEE. HYDROCAMPA, pars, Curtis. 



This genus of the China-mark moths has long narrow vrings, rounded at the extremity ; the disc marked 

 with flexuous lines, and ocellated in the middle ; the labial palpi ascending, with the terminal joint rather 

 thickly squamose ; the spiral tongue rather short. The larva feeds on Stratiotes aloides, and has the sides of 

 the body furnished with slender filamentous appendages connected with the organs of respiration. 



Species 1. — Paraponyx stratiotata '' — (Plate LXXVI., Fig. 26) — Measures from |. to 1 inch in 



expanse ; fore wings straw-coloured, (male,) or pale reddish-brown, (female), with two dark dots on the disc ; 



towards the base a central dark ocellus, followed by a dark flexuous striga, edged with pale; in the male, the 



extremity of the wing also rather darker ; hind wings whitish, with an interrupted striga near the extremity, and 



another at the anal angle. The caterpillar is green, varied with yellow and white, and with a pale line down 



the back. The moth appears in June and July, and is common in marshy places. 



* Sykontues. — Phalcena Geometra stratiotata, Linnaeus ; Hiibner j Haworth ; Stephens ; Wood, fig, 802 ; Curtis, Brit. Ent. pi. 495, 



Phalcena Geometra paludata, Fabricius. 



VOL. II. 



