THE ENTOMOLOGIST. 193 
a box to pair, and that this happened appeared by the issue. 
The female laid on the 20th of thé month one hundred and 
twenty-one little eggs; further, other thirty: they were set 
here and there by heaps, and fastened with a shining humour 
or glue, appearing in their natural size and colour like a, fig. 1, 
table iii.; to the naked eye they seemed smooth and shining, 
but through the microscope they looked a little rough. At the 
elapse of eight days they changed colour and became some- 
what darker, but at the same time they became crumpled and 
withered, a proof that they were not wind-eggs, but fruitful : 
they remained thus all winter. 
“No. 3.—April 18, 1762, the caterpillars came out of the 
eggs; the day before, the eggs were blacklead-coloured 
(potloot kleurig), and to the last as transparent as glass, so 
that I could see the grubs in them with a microscope of two 
lines focus: at ‘c’ I picture an egg of this sort thus magnified. 
The grubs when hatched were very nimble and cheerful, and 
of the size like ‘d.’ They stretched themselves also (ze spanden 
toen noch), that is, they used only twelve feet in walking, but 
T could see with a good magnifying-glass that they had already 
sixteen feet. At first sight they seemed to be of a brown 
colour, but when I looked at them through the microscope (with 
an armed-eye) they seemed yellowish with brown rings, black 
head, and horny shields (dierge lyke schildjes) behind the head 
or on the first ring. They did not eat up the empty shells of 
their eggs. I gave them at first burr-leaves, for there were 
no burr-stalks grown yet, but they let the leaves lie 
untouched; on the contrary, they made themselves holes in 
the stems of them, and thus made ready a way to the inside, 
where they found their food, with which also they helped 
themselves until we could give them stalks. But since these 
grubs, according to their way of living, always kept themselves 
hid in the aforesaid stalks, it was hard to observe how often 
they sloughed, and I have only been able to note with 
certainty that the first sloughing happened when they were 
eight days old. After this sloughing they walked on fourteen 
feet, and stretched thus still a little; but it was not long 
before they used sixteen feet in walking,—that is all their 
feet. 
“No. 4.—Their food, as proved above, is the pith only of 
the burr-stems, and to get at it the caterpillar makes with its 
