81 
On the 8th of June, we visited the grounds of Mr. Bishop, and 
found his strawberry beds badly infested—indeed, almost destroyed— 
by this pest, along with a leaf-roller, to be presently described. The 
borer eats irregular channels through the crown, sometimes exca- 
vating large chambers, at other times merely girdling it in various 
directions, here and there eating its way to the surface. Whether 
these chambers and channels are due to the presence of more worms 
than one in a single root, we were unable to determine with cer- 
tainty. Most of the cavities contained a moderate-sized, soft, silly 
case, which, when opened, appeared nearly full of exuvie. These 
cases had served as a place of retreat during winter. Most of the 
larve found at this date had eaten their way to the upper part of 
the crown of the plant, jusi under the surface, and were found about 
the center, with a hole eaten through the surface. From the fact 
that a large number of roots were examined, and although almost 
every one was more or less injured, but very few larve wére to be 
found, we inferred that the probabilities were that the larve, when 
mature, usually leave the root, and undergo the change to chrysalis, 
either under the surface of the ground or amongst rubbish at the 
surface. One chrysalis only was found, and that was in the cavity 
of a root. As soon as Mr. Bishop had discovered the destructive | 
character of this pest, he, with commendable caution, refused to sell 
any more plants until the insect was subdued, for fear of spreading 
the evil. He is of opinion that the insect came to him from some 
part of the United States, with some plants of the Hooker straw- 
berry, as it was in a patch of these so obtained, that he first no- 
ticed the insect working. 
Specimens of the larve gotten late in the season wintered over, 
and were examined on the 12th of January following, when they did 
not appear so plump in body as those examined in July. They ap- 
pear to spend most of the winter in a torpid state within the silken 
cases before mentioned. Several were found thus sheltered at this 
time, and one, whose original abode had been disturbed in the fall, 
had prepared for itself a similar casing within the fold of a straw- 
berry leaf. In this latter instance the larva seemed quite active, 
moving itself briskly about whenever touched. The chrysalis of the 
insect is very small, and of the usual dark reddish-brown color. 
That one which was found on the 8th of June produced the moth 
on the i2th of July.” 
This crown miner was found by one.of my assistants, Mr. W. H. 
Garman, at Normal, September 27, abundantly infesting the crowns 
of wild strawberry plants which he was searching for crown-borers 
and other injurious insects. A number of these plants transferred 
to the laboratory for observation, are still alive in good condition, 
and contain the living larve. 
We shall, therefore, probably be able to complete the life history 
‘of the insect next year, with respect to the particulars which remain 
yet unknown. 
Remedies. 
It is evident that wild and seedling plants should be destroyed 
whenever possible, since they furnish a perfect harborage and breed- 
