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=) 

are pale ashy yellow; the body is clay-coloured, except the base of the abdomen, which is more ashy. The 
under side of the fore wings is marked with an ashy patch on the disc. Very rare, supposed by Mr. Stephens 
to have been taken either at Birch or Darenth Woods. Ochsenheimer and Boisduval give Austria as its only 
known European habitat. 
SPECIES 6.—LITHOSIA COMPLANA. Puare XX., Fie. 12, 13. 
Svnonymes.—Phalena (Noct.) complana, Linn.; Fabr. ; Ochs.; | plate 70; fig. e—h; Wood, Ind. Ent. pl. 8, f. 100. 
God. ; Bdv. ; Haworth; Leach, Zool. Misc. 1, pl. 49, fig. 3; Albin, | Bombyx plumbeola, Hiibner; Bomb. pl. 24, fig. 100 (male). 

This is the commonest species of the genus, and measures from an inch to sixteen lines in the expanse of the 
cbunolartar fore wings, which are of a pale ashy dove-colour, with a silky gloss, the fore margin having a stripe of buff, 
#-D which terminates at the tip of the wing in a point ; the hind wings are pale ashy buff; the head and front of 
the thorax are also buff, and the remainder of the body ashy ; the fore wings beneath are ashy, with the costa 
and apex rather broadly buff. The caterpillar is black, with short hairs, and with two yellow dorsal stripes, 
spotted with red and white, and a slender red line, on each side above the feet. The cocoon is brownish, and the 
chrysalis red-brown. The larva feeds upon the oak, fir, ash, poplar, and other trees in May and June, and the 
moth (which appears to be widely distributed, and very abundant in woody places) flies in July. 

SPECIES 7.—LITHOSIA DEPRESSA. Prater XX., Fie. 14. 
Synonymes.—Noctua depressa, Esper; Ochsenheimer ; Boisduval ; Stephens ; Wood, Ind. Ent. pl. 8, fig. 101. 
Bombyx ochreola, Hiibner ; Curtis; (L. 0). 

This species 1s nearly related to the preceding, but is rather longer, measuring 14 inch in the expanse of the 

(onplanw fore wings, which are very narrow, and of a silvery ashy colour, with a clay-coloured fore margin of equal width 
FLD throughout, and not terminating in a point as in L. complana; the hind wings ashy at the base, but gradually 
shaded off to the edge, which is clear yellowish; the head and front of the thorax clay-coloured, and the 
remainder of the body ashy. Found by Mr. Stephens at Ripley, and also taken (but very rarely) at Darenth 
Wood, Kent. 
SPECIES 8.—LITHOSIA HELVOLA. Puare XX., Fie. 15. 
Synonymes.— Bombyx Helvola, Hubner; Stephens ; Wood, Ind. Noctua deplana, Esper; Borkhausen; Schrank. 
Ent. pl. 8, fig. 98. Noctua complana, female, Esper. 
Lithosia Helvola, Ochsenheimer ; Boisduval. 

This species varies from nine to fourteen lines in expanse of the fore wings, which are of a livid or dove- 
coloured hue ; the extremity of the fore margin clay-coloured, and the hind margin ashy grey, and the hind 

eae wings are light buff, shaded off to brown along the outer margin ; the head and thorax in front are clay-coloured ; 
the fore wings beneath are dusky, with the edges clay-coloured. Found near Brockenhurst in the New F orest, 
and in Norbury Park, Surrey, in great plenty, by Mr. Walton. 



SPECIES 9.—LITHOSIA MUSCERDA. Puarr XX., Fie. 16. 
Synonymes.—Bombyx Muscerda, Hiibner; Ochsenh.; Curtis, | 
Brit. Ent., pl. 36; Wood, Ind. Ent., plate 8, fig. 104. 
Noctua pudorina, Esper. 
Noctua cinerina, Esper. 
Tinea perlella, Fabr. ; Rossi. 
Lithosia perla, Fabr. 
The expansion of the wings of this species is 13-inch. The general colour of the insect is 2 brownish hue, 
ale-straw coloured, with about five small black spots placed 
the hind wings paler ashy-grey. This very rare species has been 
found at the end of June in Horning marshes, Norfolk. 
tinged with fleshy buff, the fore margin being p 
irregularly towards the middle of the wing ; 
