28 THE GENERA OF BRITISH MOTHS. 
The genus Demas. The insects assigned to this genus have the antenne of the males slightly pectinated ; 
those of the female filiform ; the thorax crested ; the fore legs not hairy. The Caterpillars have tufts of hair. 
There is only one British species. 
Demas Coryli (the Nut-tree Tussock, No 6). The markings of this insect vary considerably in different 
specimens. The Caterpillar (No. 7) feeds on Birch and Hazel in May and September, being double brooded ; and 
the Moth appears in April and July. It oceurs in woods near London and other parts of the country, and has 
been recently taken in some abundance at Epping. 
The genus Orgyia contains two British species, one very common and the other extremely rare. It may be 
at once distinguished from the previously described genera by the remarkable character of the females, which are 
almost entirely wingless, and would not be recognised as Moths, except by those acquainted with, at all events, 
the rudiments of entomology. 
The common species, Orgyia Antiqua (the Vapourer), is seen in abundance every season, and, as their ordi- 
nary time of flying is by day, they are among the first of our common Moths that become known to a young 
collector ; their fitful rising and falling flight, which might be described as ‘‘vapouring,” has originated their 
popular name, for it could not fail to be generally remarked, as this pretty little Moth is so bold that he does 
not continue his promenades to the fields and gardens, but pursues his excursions into the midst of our most 
densely built towns and cities. The Common Vapourer is brown, with one white spot near the posterior angle of 
the front-wing. Although the male Moth is so well known, few, except ;professed entomologists, are acquainted 
with the female—a heavy, wingless creature, of a dull gray colour, entirely unlike its winged and warmly tinted 
mate, as may be seen by the representation of the female of the second species, O. Gonostigma (No. 9). The 
Caterpillar is very handsome, and is found on all kinds of plants, especially rose-trees, throughout the summer. It 
is of a darkish brown colour, varied with spots of bright red, and has compact tussocks, or tufts of whitish hairs, 
on seyeral of the anterior segments, and long, spreading, pencil-like bushes of bushy black hairs (knobbed at 
the end) at each side of the head and tail. Orgyia Gonostigma, the second species (the Rare Vapourer), has the 
brown ground colour of its wings beautifully varied by several white and orange markings and spottings, especially 
near the tips, as shown in the representation (No, 8), and some of the lighter portions of the fore-wings are suffused 
with a soft, pinkish tone. The female, though closely resembling that of the preceding species in possessing only 
the mere rudiments of wings, and in the same dull, cold, gray colour, is very much larger, though the male is as 
nearly as possible of the same size as O, Antiqua. The Caterpillar is distinguished from that of the common 
species by a distinct orange stripe on each side of the back, and by the browner colour of the tussocks. It is 
found on Bramble, Hazel, and Oak, but is very rare, though specimens are taken in the south of England nearly 
every season. Doncaster, Combe Wood, and Epping, are also mentioned as localities where it has been found. 
The following is the arrangement of the two Sub-Families and the sixteen Genera contained in the family 
of the Arctiidae. 
FAMILY IV.—ARCTIIDA. 
Sun-Famity 1.—Lipaript, containing nine genera :— 
1. Lymantria . . The Black Arches. 6. Lelia G 3 . The Whittlesea Ermine, 
2. Hypogymna ¢ The Gipsy. 7. Leucoma . . The Black V-Moth. 
3. Dasychira 5 - The Dark Tussock. 8. Stilpnotia. a . The White Satin Moth. 
4. Demas < : The Nut-tree Tussock. | 9, Euproctes j . . The Brown-tail Moth. 
5. Orgyia . 0 . The Vapourers. 
Sup-Famity 2.—The Crprontpt, containing seven genera :— 
1. Hypercompa . . The Scarlet Tiger. 5. Phragmatobia —. . The Ruby Tiger. 
2. Deacrisia . » . The Clouded Buff. 6. Spilosoma : é The Large Ermine. 
3. Arctia . ° . The Garden Tiger, &e. 7. Cyenia 0 : . The Spotted Muslin. 
4, Parasemia . . . The Wood Tiger. 
