Ti 
tion has seemed to be as positive a disadvantage, and that is where 
insects have been imported without nature’s checks being brought 
with them. As a result they have increased to an unprecedented 
extent before the balance of nature was restored. 
It is my object to give you a partial bird’s-eye view of Colorado’s 
condition from the standpoint of an economic entomologist. It will 
be impossible to mention more than a few of the important insect 
enemies. 
The codling moth was unknown in several fruit growing regions of 
the State ten years ago, but now it is a serious drawback to the suc- 
cessful culture of the apple in every apple-growing section of any 
considerable size. In the warmer portions it is so bad as to almost 
dishearten the orchardist, and those who do not attend well to the 
application of the best remedies are barely able to market any perfect 
fruit except of the early varieties that catch the larve of the first 
brood only. Spraying with arsenites is quite generally practiced, 
and white arsenic is preferred by a considerable proportion of the 
growers because of its cheapness and ease of distribution. Bands of 
burlap are quite extensively used and with results that fully warrant 
their continuance as a means of capturing the larve. 
A habit of the larva that I have not seen mentioned in any publica- 
tion upon this insect was reported to me last year. Mr. A. V. Sharpe, 
of Fruita, Colo., at the time acting horticultural inspector for Mesa 
County, wrote me that a neighbor had taken larve of the codling 
moth in considerable numbers under fresh bands put upon the trees 
early in the spring. To test how extensive this spring migrating 
habit is I had bands put upon trees in several localities of the State 
the past spring, and a small number of the larve were taken, but 
hardly a sufficient number to make it advisable to adopt this method of 
combating the first brood. 
Another matter of considerable interest in connection with the life 
habits of this insect was reported at a horticultural meeting at Grand 
Junction last winter, and well authenticated. A gentleman, whose 
name I can not recall, stated that a year or two previous he selected a 
number of barrels of very choice apples at the time of gathering in 
the fall and put them in a pit for the winter. He said he took par- 
ticular pains to put no wormy apples in the pit, but when he opened 
the pit and took out the apples late in the winter he found to his 
astonishment that nearly every apple had a wormhole in it. The 
supposition was that a late brood of moths had deposited eggs upon the 
apples, and that they hatched and matured larvee in the pit. 
I should be glad to know if other members of the association have 
met with such an instance in their experiences with this insect. 
Two leat-rollers, Cacecia semiferana and C. argyrospila. These two 
species, of wide distribution over the country, have neyer been known 
