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73 BRITISH MOTHS 
hind wings are white, but more ashy in the female, with the margin spotted with dusky. The thorax is ashy, 
spotted with black, and the abdomen milky white, with dusky marks. There are several varieties, chiefly 
differing in the deep or paler ground colour of the body and wings, and the intensity of the markings. 
The caterpillar is green, with a reddish head, the back dull lilac, separated from the green colour by an 
angulated white stripe. It, however, differs considerably in its colours at different periods of its larva state ; 
when full fed it encloses itself in a cocoon formed of chips of wood agglutinated together so firmly that it is 
almost impossible to cut it with a knife. It feeds on willow, poplars, &c. in August, and the moth appears in 
the beginning of the following summer. 
SPECIES 9.—CERURA ERMINEA. Puare XV., Fie. 14, 15. 
Synonymes.— Bombyx erminea, Hiibner ; Ochsenheimer; Curtis; Stephens; Wood, Ind. Ent., pl. 5, fig. 22. 
This species is very closely allied to the preceding, but is smaller, being 21 to 3 inches in expanse; the back 
of the thorax is white, spotted with black; the abdomen, with the four middle segments, black in the middle 
and along the sides, leaving a white dorsal line ; the extremity white, with two black double lines at the middle ; 
the wings milk-white, with a smaller fascia formed by the two parallel lines (making a V in the middle) ; near 
the base a blackish middle stripe, followed by waving stripes and marginal punctures; the under wings in the 
female white. 
The caterpillar feeds on various species of Populus, and very much resembles that of the preceding species ; 
the head has two black spots, and the anal filaments are not spotted with black. 
DESCRIPTION OF PLATE XVI. 
Insects. —Fig. 1. Endromis versicolor, male (the Kentish glory-moth). 2. The Female. 3. The Caterpillar. 
se Fig. 4. Disphragis Ceruleocephala, male (the figure-of-8 moth). 4. The Caterpillar. 
eS Fig. 5. Apoda Testudo (the small oak egger-moth) male. 6, The Female. 7. The Caterpillar, 29. The Chrysalis. 
he Fig. 8. Heterogenea Asellus. 9. The Caterpillar. 30. The Chrysalis. 
. Fig. 10. Fumea Nitidella (the shining chimney-sweep). 11. The Caterpillar. The case is figured to the left of fig. 5. 
% Fig. 12. Fumea Pulla (the small chimney-sweep). The case is figured near the top of the right wings of fig. 5. 
oh Fig. 13. Fumea Muscella (the transparent chimney-sweep). 
os Fig. 14. Fumea Bombycella. 
a Fig. 15. Fumea Pectinella (the light chimney-sweep). 
§ Fig. 16. Psyche Fusca (the brown muslin moth). 28. The Female. 26. The Caterpillar, 4 larger than nature without its case. 
27. The Chrysalis of the female. 
ol Fig. 18. Nudaria Hemerobea. 
" Fig. 19. Nudaria Mundana (the muslin moth). 20*. The Caterpillar. 
rt Fig. 20. Nudaria Senex (the round winged muslin moth). 
Prants.—Fig. 21. Alnus glutinosa (the common Alder), 22. The common oak. 23, Salix arenaria (the downy mountain willow). 
24. Briza media (common quaking grass). 25. Cetraria glauca (a common Lichen). 
Endromis versicolor male and female, Apoda Testudo male and female, and the three species of Nudaria, are from specimens in the Museum ; 
F. Nitidella, F. Pulla, and P. Fusca are from Continental specimens, furnished to the Museum by Dr. Becker: H. Asellus, from the cabinet of 
Mr. Stephens; and D. Ceruleocephala, from a specimen sent to me by Mr. H. Doubleday. The caterpillar of E. versicolor is from an original 
drawing by Standish ; that of D, Cxruleocephala, from Donovan. All the others are from Hiibner,’with the exception of the whole of the outlines 
relating to P, Fusca, which are from drawings furnished by Mr. Westwood. H. N. H, 

