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90 BRITISH MOTHS 
with a small black V-like mark in the centre towards the costa; the veins are luteous; the antennz have the 
rays yellowish ; and the thorax and abdomen are white (or deep tawny or fulvous, as described by Mr. Haworth). 
The caterpillar is dirty reddish or brown, with eight tufts on the back, of which the two anterior and three 
posterior are whitish. It feeds on the lime, and the moth appears in the middle of August. The chrysalis is 
green, with a black spot on the thorax. The species is extremely rare in this country ; but has been found near 
Darenth, Kent. 

STILPNOTIA *, Wesrwoop. (LEUCOMA, p. Sreruens. LIPARIS, p. Borspuvat.) 
If any weight is to be given to the peculiarities in the larva state in the determination of the genera of this 
family, Bombyx Salicis, Linn. must be separated from the preceding, as its caterpillar is destitute of tufts of 
hairs on the back, in which respect it approaches Porthesia; but the abdomen of the perfect insects of that 
genus are tufted, and the entire habit is different, B. Salicis having long satin-like semi-transparent wings, the 
anterior pair of which exhibit a character which I do not find in any of the adjoining groups, namely the greater 
distance of the terminal branches of the subcostal vein from the costa, and the much greater length of the 
terminal branchlet (as clearly represented in our figure 2); whereas in the other adjacent Arctiide the terminal 
branchlets are so close to the costa that the apical one is almost obsolete. The palpi are very short and pointed. 

SPECIES 1.—STILPNOTIA SALICIS. Puarr XVIII., Fie. 2, 3, 4. 
Synonymes.—Phalena (Bombyx) Salicis, Linneus ; Albin, pl. 84, fig a—d; Wilkes, 2], pl. 41 ; Harris, Aurelian, pl. 5; Donovan, vol. 1, 
pl. 30; Stephens (Leucoma 8S.) ; Wood, Ind. Ent. t. 7, fig. 64. 
This species measures from 13 to 2 inches in the expanse of the wings, which are of a pure white colour, and 
glossy, like satin ; the branches of the antennew black; the body black, thickly clothed with white hairs ; and 
the legs white, with black rings. 
The caterpillar is pilose and black, with a row of white dorsal patches, and small red lateral spots. The 
chrysalis is black, clothed with long white hairs, and inclosed in a semi-transparent cocoon. The caterpillar feeds 
on willows and poplars in June ; and the moth, which is extremely abundant, appears in July. 

PORTHESIA+4, Sreenens. (HUPROCTIS, Hisner.) 
Like Stilpnotia, the caterpillars of this genus are destitute of dorsal tufts; but have long whiskers, or pencils 
of hairs, at the sides of the head. The moths have short opaque glossy wings ; the abdomen tufted in both sexes, 
but more especially in the female; the down at its extremity being employed to envelop the eggs when deposited ; 
the antenne are short, and the legs very downy. The fore wingsin the males differ in colour on the two surfaces, 
SPECIES 3.—PORTHESIA CHRYSORRH/A. Puare XVIII., Fie. 7 and 8. 
_ Synonymes.—Phalena (Bombyx) chrysorrhea, Linneus; Albin, | Donovan, 1, pl. 10; Wood, Ind. Ent. t. 7, fig. 65—65. 
pl. 87, fig. e—i; Wilkes, pl. 59 ; Harris, Aurelian, pl. 25, fig. p—s ; Bombyx aurifiuus, Esper ; Haworth (male). 
This species varies from 11 to 12 inch in the expansion of its wings, which, as well as the body, are of a pure 
white; the branches of the antenne and tail golden-coloured. ‘The male differs in having the under side of the 

* Derived from the Greek, in allusion to the shining wings of the moth. 
t+ Derived from the Greek, and alluding to the destruction often produced by the caterpillars. 

