
AND THEIR TRANSFORMATIONS. 205 
The antennz but slightly subdenticulated in the male, the thorax rounded and slightly'crested, the wings marked 
with straight transverse subparallel strigse. The caterpillars are green, flat beneath, attenuated behind, with a 
small subglobose head, and which feed between rolled up leaves; the cocoon is of a very slight texture. 

SPECIES 1.—PLASTENIS SUBTUSA. Puiare XLIV., Fie. 1, 4. 
Sywonymr.—Noctwa subtusa, Wien. Verz.; Fabricius ; Hiibner ; Haworth ; Stephens; Wood, Ind. Ent, pl. 14, fig. 335. 
This species measures from 1 to 1+ inch in the expanse of the fore wings, which are of a pale ashy buff or 
brownish olive tinge, with a pale yellowish abbreviated striga towards the base. Another similar straight, slender, 
transverse one before the middle, succeeded by the stigmata, which are large, wide apart, and slightly darker than 
the rest of the wing, with pale yellow edges, the supplemental one being present and resting on the second 
striga ; the third striga is distant, slender, yellow, and slightly bent; the fourth ordinary striga is almost 
obsolete ; the hind wings are similarly coloured, without any markings. The caterpillar is a very pale green, 
speckled with white and with yellow longitudinal lines; the head black varied with white. It feeds on the 
poplar, and the moth appears in July, frequenting the trunks of the same trees. It is rather rare, but occurs 
in the woods round London. 
SPECIES 2.—PLASTENIS RETUSA. Puare XLIV., Fie. 2 ann 8. (Larva.) 
Synonymrs.—Phalena (Noctua) retusa, Linneus; Hiibner ; Phalena ( Noct.) 'chrysoglossa, ‘Beckwith#'in ‘Linn. Trans, 2, 
Haworth; Ochsenheimer; Stephens; Wood, Ind. Ent. pl. 14, | pl. 1, fig. 10,11; Donovan 10, pl. 350, fig. 2; Stewart. 
fig. 336. Phat. Noct. vetula, Hiibner teste Haworth. 
This species measures about an inch in the expansion of the fore wings, which are rather hooked at the tips, 
and of a greenish-brown hue, with three oblique but regular strige of a darker brown colour, edged within with 
white, namely, two towards the base of the wing, and a third beyond the stigmata; the apical portion of the 
wing being brown, within which runs a rather faint undulating fourth striga ; between the stigmata, also towards 
the inner margin of the wing, runs an irregular brown bar. The two ordinary stigmata are accompanied by 
a third teliform one, which is, however, almost obsolete, almost extending from the striga preceding to the one 
following the stigmata. The hind wings are brown, with the margin slightly darker. The ciliz pale rufescent. 
The caterpillar is of a beautiful green colour, through the transparent skin of which the intestines are easily 
seen. It is very slender and elongated, and in its motion slightly imitates the larve of the Geometride. It is 
found on the great round-leaved willow, and the sallow, in the middle of June; and the moth appears in the 
following month. It is not a common species. 
Noctua eraciiis of Haworth is retained as a species by Curtis, Stephens and Wood (pl. 14, f. 337), 
although Stephens, as well as Haworth, considers it as a probable variety of the preceding insect ; it is however 
rather larger, measuring 13 lines in expanse; the body longer and more slender ; the wings of a brown colour, 
with the strige less distinct, the subapical one being entirely obsolete. Found in the middle of July on the 
trunks of trees. 
CLEOCERIS, Boispuvar, BOMBYCIA anp CYMATOPHORA, Sveruens. 
As there are some doubts respecting the propriety of the employment of Hiibner’s name Bombycia (espe- 
cially as the group here adopted is not of the same extent as it is found in Mr. Stephens’s illustrations) ; and 
as neither of the insects to be described in the present group are the types of Trietschke’s genus Cymatophora, 
I have adopted both the views and name of Boisduval. The antenne are bipectinated in the males and serrated 
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