70 HYRIA AURORARIA. 
through the winter, and well into the summer of the 
present year, as, at the time in spring when most 
other hybernating larve were waking up, they persis- 
tently refused to show any signs of vitality beyond 
moving the front portion of the body backwards and 
forwards when touched. At this time they were about 
five-eighths of an inch in length, and were about the 
most soberly attired larvee I ever had, being in colour 
almost uniformly very dark dull brown (almost black 
in some specimens), and with the exception of a still 
darker double dorsal line, and being a little paler at 
the segmental divisions, there was no other colour or 
marking. ‘The latter part of May having arrived, and 
finding they did not seem disposed to avail themselves 
of the various kinds of plants I endeavoured to induce 
them to accept as food, including Plantago major, 
Anemone nemorosa, etc., besides the Polygonum avicu- 
lare, | took them up into a warm room, and again 
gave them a plentiful and varied supply of provender. 
Here I had soon the satisfaction of finding that one 
of them had evidently set to work with a will, again 
on Polygonum aviculare, and by the 1st of July it was 
full grown, when I described it as follows: 
Length three-quarters of an inch; can scarcely be 
called slender, though not stout ; head the same width 
as the second segment; it has the face flat, and is 
distinctly notched on the crown; body somewhat flat 
when viewed from above, but rounded ventrally ; the | 
ninth segment is the widest, and from it each becomes 
narrower to the head; the four posterior segments 
are of nearly uniform width, and about as wide as the 
sixth ; the segments overlap each other considerably, 
rendering the divisions distinct, and also forming on 
each side a conspicuous lateral ridge; the skin is 
ribbed transversely throughout, and has a tough wiry 
appearance ; in shape and habits it bears a very strong 
resemblance to many larve of the Acidaliz ; ground 
colour a medium shade of brown, with a very faint 
pink tinge, and also appears to be slightly powdered 
