276 ’ THE ENTOMOLOGIST. 
and transparent, stuck over with a few fine hairs. As soon 
as the caterpillar began to graze upon the leaf it became a 
little greener; and when it had become one or two days old 
it gave up eating the leaf anywhere but on the edge, or else 
it made holes in it, Four days after its birth it moulted for the 
first time, and shortly afterwards ate the skin thrown off; and 
this it did on every following occasion. Then it still appeared, 
under the microscope, quite shiny, as before, especially its 
head, was as transparent as glass; and that, as well as the 
whole caterpillar, set with single, black, stiff, little hairs, 
standing chiefly on white knobs, and the rest on black spots. 
Moreover, it had round abont it a great number of black 
spots, following the course of the above-named rings; but 
these and the white knobs were so uncommonly fine that one 
could only distinguish them by aid of the microscope, melting 
away, as it were, into the green ground of the colour of the 
caterpillar, whereby the animal appeared to the naked eye of 
a pale green, and became paler as it grew larger and older. 
Our caterpillar, after having moulted three times more, at 
intervals of about four days, remained, after the last moult, 
six days eating and growing, and reached its maturity 
on the twenty-second day. ..... . Here I beg to 
remark that, at first sight, there is such a great likeness 
between this sort of caterpillar and that of the ordinary small 
butterfly, P. Rapz, that one can hardly distinguish one from 
the other, unless one pay attention to two characteristics, 
which do not at all strike the eye at first, to wit—over the 
back of the small butterfly caterpillar runs a very faint, pale 
yellow stripe, which is not the case with the caterpillar 
under discussion ; further, the spiracles of this caterpillar are 
surrounded by a little yellow ring, which is wanting in the 
kind before named, but in the same place both of them have 
a short yellow stripe near,.the spiracle. In all other respects 
these two kinds of caterpillar are exactly alike. 
§ 4.—Our caterpillar having, as we said, reached the age 
of twenty-two days, forsook its usual haunts and food, seeking 
a suitable place for its coming change; and, having found — 
this, it remained quiet for half a day. After that it spun 
itself fast, the same day, in the usual manner of the butterfly 
caterpillars of the second order, to wit—having fastened its 
hinder end, by means of a fine web, it spun across its body a 
