8 HIMERA PENNARIA. 
end of April; at least, the larve I have captured have 
been quite three weeks behind my larve reared 
indoors. 
The young larva is about one-eighteenth of an inch 
‘in length, in colour dull black except the anal flap, 
which is pale brownish, as also are the legs, tipped, 
however, with black; the usual spots palish brown 
with raised central black dot emitting a short, finely 
knobbed bristle; as the larva feeds the colour grows 
paler, becoming a sort of dark olive with pale lines ; 
one, which | set apart for observation, moulted for 
the first time just a fortnight after hatching, and Ll 
noted that at this first moult there appeared the two 
projecting warts on the twelfth segment, which (with 
other circumstances) enabled me to recognise the 
species; but I presently also noted another change 
which puzzled me greatly: I took these little larvee 
to be Himera pennaria—a species in which I had 
never before seen more than ten legs, nor had anyone 
described it with more than ten legs, but now there 
appeared a pair of undeveloped ventral legs on the ninth 
segment. As I have inferred, I certainly did not see 
these legs previous to the moult, nor do I think they 
were then to be seen, but what follows makes me wish 
I had made quite certain: this pair of legs continues 
through the second moult, becomes smaller after the 
third moult, and with the fourth moult disappears, the 
site being marked by a minute eminence, and after- 
wards by a little horny depressed plate; and the larva, 
to all appearance, has but the ten legs with which it 
has always been credited. At their fullest develop- 
ment these extra legs are very tiny, still they are 
plainly enough to be seen, and are more like the 
rounded ventral legs of a Noctua than the spreading, 
clinging legs of a large Geometer; they have a black 
ring round them midway, and a circle of tiny black 
horny points where the usual circlet of hooks is 
found. 
Both Mr. Buckler and Dr. T. A. Chapman have 
