THE GENERA OF BRITISH MOTHS. 19 
the fine specimens now in the British Museum. The larva is green, with raised whitish dots, a whitish streak 
on the fourth segment, and a slender yellow band across the twelfth. It feeds on Birch and Elm, and when 
in repose raises the three first segments nearly erect, like some of the Sphingidw. It is from some of the 
positions of the Caterpillar that the Moths of this genus have been popularly termed ‘ Sprawlers.” 
The old species, P. Cassinea (the Sprawler), is very much smaller than the preceding. It is pale grayish 
brown, with a dark streak from the base along the middle; and towards the margin are several short black 
streaks and a few whitish marks. The hind-wings are pale buff, with a brown mark near the centre. The 
Caterpillar is bright green inclining to yellowish, with white lines along the back, and lateral lines of pale yellow 
meeting it at the anal prominence. It feeds on forest trees in May, and the Moths appear in September. 
The three following genera I shall describe without illustration, in order not to exceed the number ot 
Plates to which this volume is restricted :— 
In the genus Ptilophora, the males have pectinated antenne of peculiar and feathery character, from 
which the specific name of the only species, Plumigera, is derived. P. Plumigera (the Plumed Prominent) 
measures about an inch and three-quarters across the wings, which are narrow, and resemble in form and colour 
those of the Hepialide. The body and fore wings are of a warm ochre, with a slight flush of purple, and 
there are two narrow transverse bands of a paler ochre. The hind-wings, which are sometimes rather pinkish, 
are slightly marked with waved bands of a darker tone. The female has the antenne only slightly serrated. 
The Caterpillar is greenish, with a slate-coloured stripe along the back, and several pale streaks at the sides. 
Tt feeds on Maple, etc., in May, and the Moth appears in October and September. It is a rare species. 
In the genus Gluphisia, the antenne are broadly pectinated in the male, and slightly in the female. 
The only species, G. Crenata (the Dusky Marbled Brown), does not exceed an inch and a-half in the expanse 
of the wings, which are of a pale pinkish brown, with a broad deep brown band of much deeper colour across 
the middle, and waved narrow bands of the same tone near the margin. Their hind wings, of the same tone 
as the front, are but very slightly marked with deeper brown. The Caterpillar is pea-green, with dorsal and 
lateral stripes of a paler colour. It is found in August on the Black Poplar. 
In the genus Diloba, the antenne are long and bipectinated in the male, and simple in the female. The 
only British species is a small Moth, about one and a-half inch in expanse. Déiloba Caruleocephala (the Figure- 
of-Eight Moth) is of a fine ashy-gray, blue about the head and thorax, from which it derives its specific name. 
The gray ground colour of the wings becomes brownish at the tip and base. Across the centre, leaying a broad 
space between, are two angulated black lines, with faint cloudy bands beyond. Between the black lines are 
white marks, somewhat in the form of a figure of 8, from which it derived the popular name, the Figure-of- 
Eight Moth. The Caterpillar is lead-coloured, streaked with pale yellow lines, and conspicuously spotted with 
black, It feeds on the Sloe, in May, and the Moth appears in August. 
PLATE VI. 
No. 1.—The Great Prominent (Peridea Trepida). No. 7.—The Caterpillar of the Emperor-Moth. 
No. 2.—The Caterpillar of the Great Prominent. No, 8,—The Oak Lappet (Gastropacha Quercifolia). 
No. 3,—The Kentish Glory (Endromis Versicolor), The Male, | No 9—The Oak Lappet, showing the position of the wings 
at rest. 
No. 10.—The Caterpillar of the Oak Lappet. 
No, 11.—The Small Lappet (Gastropacha Ilicifolia). 
No. 4.—The Female of the Kentish Glory. 
No. 5.—The Caterpillar of the Kentish Glory. 
No. 6.—The Emperor-Moth (Saturnia Pavonia-Minor). No. 12.—The Caterpillar of the Small Lappet. 
Tue Moths in Plate 6 belong to the two families Nofodontide and Bombycide, but ave taken out of the 
usual order to facilitate the grouping in the Plates. The order in which they are arranged in the collection of 
Native Lepidoptera in the British Museum will be given, as before stated, in a classified list, for reference, 
inserted at the end of the Arctiide. 
