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56 BRITISH MOTHS 
streaks. It differs, however, in the more slender and acuminated abdomen of the females, furnished with a long 
exserted ovipositor, with which the eggs are deposited uncovered ; whereas in the preceding they are enveloped 
in wool stripped from the extremity of the body of the parent. 

SPECIES 1.—PSILURA MONACHA. Prater XVII., Fie. 4—7. 
Synonymes.—Phal. Bomb. Monacha, Linneus ; Haworth; Wilkes, pl. 39; Donovan, 7, pl. 227; Curtis, pl. 767 (Hypogymna m.) ; 
Wood, Ind. Ent. pl. 6, fig. 55 ; Duncan, pl. 19, fig. 1, 2. 
This handsome insect varies from 14 to nearly 23 inches in the expansion of the fore wings, which are of a 
creamy white colour, with several black spots at the base, and four very much indented, curved, black streaks 
dilated on the costa; the two middle ones being contiguous together beyond the middle of the wing, and preceded 
by a black dot and angulated line in the discoidal cell. The fringe is spotted with black ; the hind wings are 
dusky, but vary in the depth of the tint, with a submarginal darker band, and a marginal row of black dots : 
the abdomen of the female has the terminal segments (except the last one) pink, spotted with black. 
The caterpillar is ashy brown, with tufts of reddish hairs on the back, and a black heart-shaped spot on the 
second segment of the body. Tt feeds on the Scotch fir, bramble, birch, apple, oak, &c., in June and July, and 
the moth appears in July and August. It is by no means a rare insect, occurring in various parts of the South 
of England. 
ORGYIA *, Ocusenneimer. GYNAEPHORA, Husner. 
This genus Orgyia, as originally proposed by Ochsenheimer, and retained by Boisduval, was intended to 
comprise those species of this family in which the larve are furnished with thick tufts of hair on the back,—and 
which is the case with the following species, namely, Bombyx antiqua, and gonostigma (gen. Orgyia, Steph.) 
fascelina and pudibunda (gen. Dasychira, Steph.), Coryli (gen. Demas, Steph.), coenosa (Lelia), and V. nigrum 
(Leucoma, Steph. spec. typ.) B. Salicis in this respect belongs, therefore, to a distinct section, and cannot be 
retained in the same group with V. nigrum. 
As restricted by our English authors, Orgyia comprises those species which fly by day, with a vapouring 
kind of motion (whence their English name of the Vapourers), which have unwieldy partners, furnished with 
only very slight rudiments of wings, and therefore incapable of flight. They further differ from the two 
preceding groups in their tufted larva and thick pilose fore feet ; from Dasychira they differ in their day-flying 
habits, subapterous females, and short triangular wings of the males; and from the subsequent genera in the 
want of a spiral tongue. 

SPECIES 1.—ORGYIA ANTIQUA. Puarr XVII., Fie. 8, 9, 10. 
Synonymes.—Phali (Bomb.) antiqua, Linneus; Haworth; Albin, | Donovan, vol. 1, pl. 16; Stephens (Orgyia a.) ; Wood, Ind. Ent. pl. 
pl. 89, fig. a—e; Wilkes, pl. 64; Harris, Aurelian, pl. 20, fig. h—p; | 6, f. 59, pl. 7, fig. 59. 
The male of this common moth varies from 14 to 14 inch in the expanse of the fore wings, which are of a 
red brown, with dusky clouds and two undulated strige, the second of which terminates in a kidney-shaped 
white spot near the anal angle of the fore wings, and with a pale, clay-coloured crescent-shaped discoidal spot. 
The hind wings are dark orange brown. The female is dull ashy coloured, with the rudiments of wings very pale. 
The caterpillar is very handsome, being spotted with red, and with four thick whitish tufts of hair on the back, 
and with long pencils of clavate hairs at the sides of the head, at the sides of the body, and over the tail. Those 
* Derived from the Greek épéyw, extendo, and yviov, pes, from the mode in which the moths sit, with their fore feet extended. 

