—_——_xi—_—_ | _— + _____ eee =e aS 
76 
loosely to within about 2 inches of the shoulder with a good quality of — 
excelsior. The most delicate moths will bury themselves in the excel- 
sior and die uninjured, while without the excelsior everything taken 
will be ruined for preservation in the cabinet. We have taken as high 
as 2,000 moths and 3,000 beetles, besides many other insects, in one of 
these traps hung under an electric are light in one night before 12 
o'clock, and the majority of the specimens were uninjured. In some 
cases, where insects are coming in very large numbers, it is necessary 
to take the trap down about once an hour to empty it. To do this, slip 
the reservoir off the funnel, put in a teaspoonful of chloroform, and 
cork for five minutes. Then remove the bottom and take out the excel- 
sior and shake the insects into cyanide bottles. It is better, however, 
to put fresh excelsior in the reservoir and take the excelsior from the 
trap with the insects in it to aroom tu look over the catch and keep the 
delicate, easily injured specimens separate from the others. Itis almost 
necessary, where insects are coming freely at all, to empty the trap once 
at least, at about 9.30 p.m. We have found that nearly all of the 
beetles come before this time and that the moths come more freely later. 
The funnel can be left continually at the light, the reservoir with its 
contents being taken each morning and emptied. As soon as it is 
emptied, the cyanide bottle and excelsior should be put back and the 
top of the reservoir corked so as to gain strength during the day for 
the work of the night. 
OVIPOSITION IN YOUNG FOREST TREES BY TETRAOPES 
FEMORATUS, FAB. 
By C. P. GILLETTE, Fort Collins, Colo. 
On July 27 last Professor Crandall, of the department of horticul- 
ture and botany of the Colorado State Agricultural College, called my 
attention to the work of some insect that had been cutting into the 
stems and leaves of young forest trees that had been set out by the 
Division of Forestry of the U. 8S. Department of Agriculture on the col- 
lege grounds, and brought me a specimen of the above insect that he 
said he suspected to be guilty of doing the injuries. 
I visited the experimental forestry plot and found that there was an 
occasional specimen of Tetraopes femoratus on the trees, and did not 
have to look long to find a female in the act of cutting a slit across the 
petiole of a leaf of soft maple. She very soon turned about and applied 
the tip of her abdomen to the cut as if to deposit an egg. In just 
three and one-half minutes she removed the tip of her abdomen from 
the cut, wiped it from side to side a few times on the petiole and then 
took a few steps forward and began cutting another cross slit with her 
mandibles. She was one minute cutting the slit and nine minutes 
depositing the eggsin it. Four of these cuts were found on the petiole, 
4 en Daas* 
