260 [December, 
light, and not changing till just before the hatching of the larvsB, when 
they become more silvery ; the whole surface pitted, but glossy, one end 
surrounded with a rim, which shows like pearly-white beads. Some- 
times nearly 50 in a row, with the beaded ends all one way. 
Erosaria : rather shorter than the last, otherwise of the same size, 
about 13 measuring ^ inch. Colour when first laid, a dull but full 
green ; afterwards changing to a pale brown, and again becoming 
greenish before the appearance of the larvae. Surface more roughly 
pitted than in fuscantaria, but still glossy ; one end surrounded with 
a beaded rim. I have counted 25 in a row. 
Tiliaria: larger than the other two, about 11 eggs measuring 
\ inch. Colour light green when first laid, afterwards a deep brown, 
becoming silvery just at last. Surface slightly pitted, but glossy ; 
without the beaded rim at one end. Deposited apparently in rows of 
no more than 7 or 8. 
The eggs of angidaria and alniaria are of another form, being 
cylindrical, though still elongated, with one end rounded, and the other 
flattened and surrounded with the beaded rim ; and instead of lying 
flat they are deposited on their rounded ends, and stand up in a slanting 
position. 
Angularia : deposited with great regularity, both in rank and file, 
all slanting the same way, each egg standing apart from the others, so 
that about 8 are contained in \ inch. Colour a dull green, apparently 
not changing till shortly before the larvae are hatched, when they 
assume a reddish tinge. The surface slightly pitted, glossy ; the 
beaded rim of a dirty pinkish-white. I have one batch of 5 rows, 
with 8 or 9 eggs in each. 
Alniaria : eggs rather larger than the last, slightly flattened. 
Colour a dark brown, apparently not changing till they become paler 
at last ; glossy ; the beaded rim round the top (which is pitted), is of a 
pure white. The nine eggs sent me by Mr. Lacy were deposited two 
and two in a little long cluster, with sufficient indication of arrange- 
ment to show that had the moth not been pinned, she might have 
deposited them in the same way as angularia. 
The following are the dates which I have recorded for the various 
species this season : — 
Angularia : began to hatch during the last week in April ; fed 
freely on birch ; only one dying in the larval state ; they had aU spun 
up by June 14th. The moths emerged during the last week of June 
and the first of July. 
Erosaria : began to hatch May 1 3th ; by the 1 8th I had 4 larv», 
when I placed the eggs out of doors, and a sudden fall of temperature 
