destroyed the vitality of all that were left. Before now I have succeeded 
in obtaining but one moth out of a large brood of larvse, which seemed 
to feed and spin up well ; but these four went steadily on, feeding 
upon oak, spinning during the first week of July, and appearing as 
moths between 18th and 22nd of the same month. M. D'Orville, from 
the same batch of eggs, fed up several larvse, but bred only one moth. 
Fuscantaria : began to hatch on May 22nd, and although I after- 
wards placed the eggs out of doors, the larvse continued to appear for some 
time, none dying in the egg : I placed them on a seedling ash, but most 
of them died at various stages of their growth ; only three spinning 
up, (about the middle of August), and only two of these producing 
moths on September I5th. However, Mr. A. H. Jones, from whom I 
had the eggs, told me that every one of his larvse, reared in a green- 
house, fed up well, and that he met with no loss whatever among 
them. 
From 7 of the 9 eggs of alniaria, I obtained larvae between May 
29th and June 9th ; they fed freely on both sallow and birch, and all 
spun up between August 1st and 15th ; tvt^o, however, had not strength 
to assume the pupa state perfectly, but died after spinning ; and the 5 
survivors appeared as moths between August 28th and September 13th. 
Tiliaria wex'e the last to hatch, but none died in the egg ; all the 
larvse emerged between June 6th and 24th, and at first seemed to 
flourish well on sallow and birch ; but by degrees they died off one 
after another, except two, which spun up during the .first week of 
August, and appeared as moths about the 1st of September. 
Why the larvse of this genus should be so tender, and so liable to 
die off, seems a puzzle to me. 
Descriptions have been long since published of all the larvse, but 
those given in the Manual for alniaria and fuscantaria are not correct ; 
of the other three I need not now say much. So far as I can speak 
from experience, angularia and fuscantaria are the most variable, both 
in colour, and in the presence and absence of humps ; the green larvse 
seem to be sniootlier, and the gi'ey and brown varieties to be humped. 
JErosaria, although variable when small, seems constant both in colour 
and humps when full grown ; and from the number and position of the 
humps, it is the most irregular in outline. 
Alniaria, when full grown, is a grand looper, nearly 2\ inches 
long, but not very stout. Head flattened, broader in front ; the third 
pair of legs very long ; on sixth segment a narrow transverse hump 
with two lateral warts ; on seventh two lateral warts, with a slight 
swelling below ; on ninth a narrow dorsal liunp ; and on the twelfth 
two small sharp pointed warts. The colouring is intricate, but may be 
