insects which are its food, and these are secured by
means of a web. This web is placed in a niche amongst rocks or trees,
and has a central thread, from which run smaller threads to the sides of
the opening. Upon several of the lower threads there are usually a
number of globules that resemble tiny silver beads, but what is the use
of these is uncertain. Upon the middle thread the grub sits; if
startled, it glides away into a hole it has for a hiding-place. The
light comes from the hinder part of the body, and the grub can display
or darken this as it chooses. On damp, warm nights it is brightest, and
it is not visible when the weather is cold, nor, of course, during the
day. Having reached its full size, the grub becomes a chrysalis, being
fastened firmly to its web. A faint light comes from the chrysalis now
and then. When the fly comes out, that also has a faint light, only half
as bright as that of the grub; what it feeds upon is unknown.

THE GIANT OF THE TREASURE CAVES.

(_Continued from page 323._)

CHAPTER XVIII.

Mrs. Wright had been waiting in great anxiety for the return of Jack.
Twenty times over she went to the end of the sandy path to see if the
tide was going out, and returned in an anxious state of mind to make
preparations for the drenched party. She reproached herself bitterly for
carelessness. How could she have trusted so entirely to Julien? She
ought to have known he was ignorant of the tides, if not of the caves.
Her anxiety was almost more than she could bear by the time the tide had
left the gorge. Then she stood on the beach to watch, and it was with a
cry of delight that she saw the three coming towards her.

They were all glad of the hot meal which smoked upon the table in
readiness for their return, and sat down in very cheerful spirits, in
spite of their damp condition. But it was not so pleasant to be hurried
off immediately afterwards to bed and warm blankets. Julien, who had not
shown much appetite, and still looked pale and shivery, refused to go to
bed. Jack would have compelled him, but the boy begged to be allowed to
go home, as he felt ill. It really seemed the best thing to do; so,
wrapping him up in a big coat, Jack took him to the Prefet's house, and
handed him over to his mother's care, not forgetting to say a few words
in praise of the courage the boy had shown.

'Now, Jack,' said Mrs. Wright, as he entered the warm kitchen on his
return, 'if you want to do someth