142 
THE ENTOMOLOGIST’S WEEKLY INTELLIGENCER. 
when still but little curved, appears with 
the margius discoloured. Afterwards the 
mine loses its green lint, and becoming 
more curved is much more readily per- 
ceived. Old mines readily fall off. The 
larva is very lively, and changes to the 
pupa state in an opaque paper-like 
cocoon. The only locality in which I 
have yet met with it is a small wood, in 
rather a warm situation ; it does not 
occur in open places which are fully ex- 
posed to the sun ; it seems to prefer half- 
shaded localities. Cool places which 
are very shady do not seem to suit it 
either.” 
On the following day a letter was 
received from Ratisbon, in which the 
following passage occurs: — 
“Up to the present time we have 
excui'sionized in search of Gracilaria 
Imperialella on foot, in carriages, by 
steam-boat and by railway, but always 
in vain.” Imperial Misfortune No. 3. 
It now seems that the month of July 
is fast slipping away without any larvae 
of Gracilaria Imperialella reaching us. 
A SAWFLY INJURIOUS TO WILLOW 
TREES. 
To the 'Editor of the * Intelligencer,' 
Sir, — A row of pollard willow trees in 
Belsize Avenue are being entirely de- 
vastated by a larva, apparently very 
nearly approaching the well - known 
gooseberry grub, the difference being 
that it is nearly twice as large, and the 
ground colour at both extremities, for 
about one-eighth of an inch, changes 
from green to a greenish yellow; head, 
as in the other, black. Can you or any 
of your readers inform me to what species 
it belongs, and if there is any practical 
method of stopping its ravages? 
Enclosing card, 
I am. 
Yours, &c,, 
L. 
EXTRACTS FROM KALTENBACH’s 
‘vegetable-feeding insects.’* 
(Continued from p. 135.) 
Nephopteryx angustella on Euonymm. 
Bruand discovered the larva of this spe- 
cies in the seeds of spindle-tree, where it 
is to be found full grown in October. 
A. Schmid, of Frankfort, found the small 
larvEB as early as the middle of Sep- 
tember, at Mombacher Heide, near May- 
ence ; according to him, the small larv® 
spin the bunches of fruit together and 
feed on the seeds. They pass the winter 
unchanged in the earth in an earthen 
cocoon. 
Holoscolia Forficella on Festuca. The 
larva of the second brood winters in dry 
grassy places, in loose earth or under 
stones, in a white cocoon, in which it 
also moults ; in favourable weather, in 
April, it comes out at night and feeds 
on the young shoots and leaves of the 
sheep’s fescue-grass {Festuca ovma) ; at 
the end of May it changes to the pupa 
state in a rather firm white cocoon, from 
which the imago emerges in twelve or 
fifteen days (Isis, 1848, p. 338, Tab. V.). 
* ‘ Die deutsehen Phytophagen aus 
der Klasse der Inseckten,’ published 
in the ‘ Verhandlungen des Naturhis- 
torischen Vereine der preussischen Rhein- 
lande und VYestphalens.’ 
