aT se 
n> roms ot oe 
ERT LT I at 

| ql 76 BRITISH MOTHS 
| : Hil The three following species have the furcation of the postcostal vein of the hind wings slight. 
lin 7 
} | SPECIES 3.—CERURA FURCULA. Putate XV., Fie. 4, 5, 6. 
. i. Synonymes.— Phal. Bomb. furcula, Linneeus ; Fabricius; Hibner; Wilkes, pl. 29, fig. 2; Donovan, vol. 8, pl. 272; Stephens 
(Cerura f.); Wood, Ind. Ent. pl. 5, fig. 16. 
This species measures from 11 to 123 inch in the expanse of its fore wings, which are of a grey colour, spotted 
at the base as in C. bicuspis; then follows an ashy-coloured, sinuated bar, ill defined on its outer margin, 
succeeded by a pale ashy patch, in which are several dusky spots and undulated streaks, and a discoidal 
| 
. 
kK i lunule ; towards the apex of the costa is an abbreviated dusky patch, terminating in a more distinct blackish 
| | | wavy streak; the apex of the wing has a row of black dots; thorax grey in front, varied with black and orange 
il Hl behind. 
i 
The caterpillar is green, with a red patch behind the head, and an elongated one down the back (beyond the 
| a conical protuberance), margined at the sides with white; the anal filaments are also red. It feeds on willows 
i and poplars during the autumn, and the moth appears in June and July. 
It is by no means a scarce species, and is widely distributed throughout England. 
SPECIES 4.—CERURA ARCUATA. Puare XV., Fie. 3. 
Snonymes.—Cerura arcuata, Stephens. 
Cer. forficula, Fischer, Ent. Rus. ?? (Boisduval gives this as identical with fuscinula). 
Lae This species differs from C. furcula (in the same manner as C. integra does from C. bicuspis), in the integrity 
| of the external margin of the narrow dark fascia in the anterior wings, which is edged with black as well as the 
internal margin. It measures 1°, inch in the expanse of the fore wings, which are of a grey colour ; beyond 
| | H the fascia (which has the hind margin rather angulated in the middle), the fore wings are of uniform colour, with 
ie a discoidal spot and two undulated strigee of arched lines, the second of which is strongly marked and black, and 
terminates in a cinereous subapical patch on the costa ; the thorax is ashy in front. 
A single specimen, taken at Coombe Wood, is in Mr. Stephens’s cabinet. It, as well as the next, may possibly 
a be only varieties of C. furcula. 

SPECIES 5.—CERURA LATIFASCIA. Puare XV., Fic. 7. 
Synonymes.—Cerura latifascia, Curtis, Brit. Ent. pl. 193; Stephens, Ilustr.; Wood, Ind. Ent. pl. 5, fig. 18, 
; f Dicranura furcula, var., Boisduval. 
This supposed species measures rather more than 13 inch in the expanse of the fore wings, and is distinguished 
by the great breadth of the broad ashy fascia, varied with orange and margined with black, extending from the 
costa to the anal angle ; its external margin sinuated. Then follow two indented streaks, inclosing a space in the 
middle of the wings marked with several black streaks. The hind wings have a pale brownish subapical band, 
and another more slender across the middle of the wings. The abdomen is banded with black. 
Ki Mr. Curtis reared his specimen from a caterpillar found in September on a narrow-leaved sallow, near Linton, 
a || 
North Devon, and the moth appeared in the following May; and Mr. Stephens has a specimen found near London. 

