34 
licient if the nature of the case permitted. The following is a descrip- 
tion of the lamp: A tin can, 6 inches in diameter, holding about a half 
gallon of oil, was provided with a No. 2 wick burner capable of receiv- 
ing and holding a large chimney. Around the tin can was fitted a 
movable tin band to which had been soldered four stout upright wires. 
To these wires were fastened sheets of tin a foot square, extending at 
right angles and from the top of the can. These wings, together with 
the 6-inch space between for the lamp, furnished a surface of 2£ feet 
toward any direction against which insects flying near might strike 
and drop into the large pan in which the lamp was placed. The lamp 
is not easily blown out of the pan if the precaution is taken to nave 
the wings extend out far enough to catch the rim of the pan. Though 
a chimney was always used, in no instance was the light blown out 
when a strong breeze was prevailing. By experiment this lamp was 
found to emit a brilliant light, which was not hindered in its transmis- 
sion by the extended wings. 
Experiments were begun as early as May 13, 1891, and repeated at 
intervals on through the season. The results were all so uniform that 
only a few experiments need be reported in detail. 
Experiment 2. 
May 15. — Lighted at 8 : 30 p. in. Sweet corn in a garden. Locality, upland in edge 
of timber. During the afteruoonof that day many recently deposited Heliothis eggs 
were found on the corn silks. 
8:40. — Boll- worm moth flying along a row of corn next to the one in which the 
lamp is placed. When opposite the lamp, only 3 feet distant, it flew at right angles 
away from it. Lamp was on a level with the ears of corn on the plants and could 
he seen over the entire patch. 
9:00. — Another moth flying as before came near, but flew away without showing 
any attraction to the light. 
9 : 06, — One passed the lamp, turned, came near again, alighted upon the edge of the 
pan and sat there. In attempting to fly away it struck one of the tin wings and 
dropped into the pan. 
No more moths being observed, the experiment was closed at 9:40. 
Though the moths were not abundant several females were seen de- 
positing upon the fresh corn silks. 
To convey a general idea of the nature of the various trappings aside 
from the primary insect desired, experiments 3, 4, and 5 have been col- 
lated and are presented in Table XIII. 
