90 [September, 
measurement in repose or motion; rather thick in proportion, cylindrical, and 
rugose; all the legs short and placed well under the body ; in fact, it much resem- 
bles segetum, save in the rugosity, and in the further distinction, that, whereas the 
back in segetwm is coloured differently from the sides, in corticea the colour is 
spread uniformly over both alike: the ground colour then of the full-grown larva is 
brownish-grey, finely freckled with a rather darker tint of the same; the belly and 
pro-legs with a slight greenish tinge, and unfreckled: the dorsal vessel is of the 
ground colour, scarcely paler, enclosed within two lines of darker brown. The sub- 
dorsal is a dark line of grey-brown, with a fine thread of paler along its lower edge, 
followed at a little distance by another such pale and rather thicker line, though 
much interrupted or broken by the deep wrinkles of the skin: at some distance 
again below runs the sub-spiracular stripe of the same paler, greyish-brown, with 
a streak of the ground colour through the middle of it ; the head has the front 
margins of the lobes broadly streaked with blackish, and a little at the sides also, 
and the mouth is large and sometimes blackish: the plate on the second segment 
is not so noticeable as usual in this genus by any difference in colour, though it isa 
little darker brown towards the margin in front; the dorsal and sub-dorsal paler 
threads are faintly seen to pass through it. 
As the larva approaches full growth the skin becomes somewhat shining, and 
the warts which immediately after the last moult came out black, grow paler in the 
centre and are of a dark brown all round it, each still furnished with a short, fine 
bristle ; the black spiracles are rather small in size. 
As noticed before, the general appearance is more unicolorous than that of any 
species of Agrotis I have yet seen. 
The pupa is of the ordinary Agrotis form, rather stont and very smooth; at 
first whitish, and changing by degrees to a light orange-brown.—-WM. BUCKLER, 
Emsworth, July, 1871. 
Natural History of Hybernia aurantiaria.—On Nov. 6th, 1868, Mr. J. R. Wellman 
captured three pairs of moths in cop., and very kindly sent on to Mr. Buckler the 
eges laid by the females during the next two or three days. The larvee were no 
hatched till just about the middle of March, 1869; were fed by me on birch; 
came to their full growth and spun up about the middle or end of May, and the 
moths appeared Nov. 4th—13th. 
The ege is flattened and somewhat brick-shaped, but with one end more con- 
ical; the skell is stoutly ribbed, and reticulated, its appearance under a lens re- 
minding one of coarse basket-work ; the colour is at first green, afterwards puce, 
then reddish, with a long central, blackish spot, and lastly, just before the hatch- 
ing, smoky. 
The newly-hatched larvee are ¢nall in proportion to their full grown bulk; 
smooth, dark brown on the back, w {h a yellowish dorsal line, and a more distinct 
yellow spiracular line ; the head »srown, a fine pale yellow tranverse streak on 
the second segment; the belly dusky. After the first moult the brown disappears, 
and the colour throughout becomes olive-green; the next moult results in a pale, 
olive coat, with the middle of the back still paler; but after the third moult the 
back begins to show decidedly yellow again; the sides are tinged with brown, and 
the spiracular line also recovers its yellow ; and from this time a nearer approach 
is made to the appearance exhibited at full growth. 
