AND THEIR TRANSFORMATIONS. 
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CERURA, Scuranx, Leacu, &c. 
(Harpyia, Ochsenheimer ; Dicranura, Latreille ; Pania, Dalman; Furcula, Lamarck). 
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This very conspicuous genus has the antenne in both sexes bipectinated, the hind margin of the fore wings 
not lobed, the palpi very small, the thorax not crested, the fore wings pale and subdiaphanous, the body very 
robust and pilose. The caterpillars are thick, smooth, fleshy, varied in their colours, with the extremity of the 
body attenuated, and terminated by two long filaments (whence the generic name derived from the Greek) instead 
of the ordinary anal prolegs, and which inclose two slender very long fleshy threads, which the insect has the 
power of protruding or exserting at will. 
The species may be thus divided: 
A. Those of smaller size, and which have a broad dark fascia across the fore wings. (Harpyias, Hiibner). 
a. Those with the postcostal vein of the hind wings simple. C. bicuspis and integra. 
b. Those with the same vein furcate. C. furcula, &c. 
B. Those of larger size, without a broad bar across the fore wings. (Harpyia, Hiibner.) C. vinula and 
erminea. 

SPECIES 1.—CERURA BICUSPIS? Purare XV., Fie. 2 and 11. 
Synonymes.—Bombyzx bicuspis 2 Hiibner ; Ochsenheimer. 
Cerura bicuspis, Stephens, Ill. vol. 2, pl. 13, fig. 3; Curtis; Wood, Ind. Ent. pl. 5, fig. 14. 
This species varies from 14 to 14 inch in the expanse of its fore wings, which are snow-white; at the base is 
a single black dot, followed by five placed transversely, which are succeeded by a broak dark bar, margined with 
black and orange towards the base of the wings, with a slight emargination in the middle ; the outward edge of 
the bar is less strongly defined, and very much sinuated in the middle, then follow several slender transverse 
markings (one more distinct than the rest) and several rows of waved pale grey streaks, the hind ones terminating 
in a large dark costal patch edged with black and orange; along the margin is a row of black dots. The hind 
wings are white, with a dusky discoidal spot, and black marginal punctures ; the thorax is white in front, blue- 
black behind, with transverse orange spots. 
The caterpillar is red-brown, with several white spots at the sides above the prolegs, the under side green. 
It feeds on willow and birch. The moth appears in July, and has been found in the Kentish woods, and also 
near Dublin. 

SPECIES 2.—CERURA INTEGRA. Puare XV., Fic. 1. 
Synonymes.—Cerura integra, Stephens, Ill. pl. 15, fig. 3; Wood,Ind. Ent. pl. 5, fig. 15. 
Dicranura bicuspis, var., Boisduval. 
This supposed species differs from the preceding in being larger, being 15% inch in expanse, and in having 
the dark fascia across the fore wings broad, entire (and not sinuated) and cinereous, margined on both sides with 
black and orange ; across the white central space runs a single arcuated obscure streak, and a similar one from 
the hinder part of the oblique, subapical, costal, cinereous patch. The hind wings have an obsolete fascia. ‘The 
thorax is ashy, with three dark slender transverse fasciz, the middle one being interrupted in the middle. 
Very rare. Mr. Stephens believes his specimen to have been taken at Coombe Wood, 
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