37 
were seen hiding behind the sheaths of the corn blades, while a number 
were also seen flying about the cowpeas. The one in the cowpeas was a 
beer- bottle lamp and placed about the height of the plants. The one in 
the corn was the electric lamp, and was placed about the height of the 
ears of corn. They were lighted at 6 p. m. At this time a few of the fe- 
males were depositing on corn. At 7 o'clock some were seen to fly by 
the lamp but were not trapped. The parasitic Ilymenoptera and smaller 
Lepidoptera had been caught in great abundance at both lamps. He- 
turning at 10 o'clock to further examine the catch of the lamps, they 
were found to have been stolen and no further notes could be taken. 
The moths at this time were not very abundant and doubtless were but 
a portion of the last brood of the season. The moths seen flying by the 
electric lamp were near enough to have been stopped had the lamp been 
provided with long projecting wings and a larger pan to receive the 
moths as they fell, ^"o Heliothids were observed at the beer-bottle 
lamp. 
These light experiments, as wili be seen from the record, were begun 
at the time that the midsummer brood was issuing abundantly, and 
hence also during the period of greatest egg deposition a little later. 
During this period, as has been stated, the provoking observation was 
made of seeing the female near the lights, deposit an egg in plain view, 
fly away and continue her work. It is evident, therefore, that the 
female is not easily diverted from the work of depositing eggs by the 
ordinary lights used. Later, when the experiments show that a few 
moths were trapped, it is also true that the period of greatest deposi- 
tion had passed, and that, though dissections showed that a few eggs 
still remained together with a number of potential ova, the females had 
passed their prime. As bearing on this the following may be drawn 
from the observations of Dr. Booth : The insect contents of a globe of a 
2,000candle power arc light were examined continuously from Septem- 
ber 3 to 13, inclusive. An average of 40 Heliothids were found for each 
night. Of these 1 in 6 or 8 were females, containing on an average 
from 30 to 40 eggs in the oviducts. The lamp tender reported that after 
September 26 no more moths were caught. 
The fact that the moth was frequently seen to fly near the light, 
often as near as 2 or 3 feet, suggests that the lamps to be efficient not 
only must be brilliant, but must also have some wide and extensive 
wings extending from it in. such a way as not to throw a shadow and 
to arrest, temporarily at least, the flight of the moth passing near by. 
If now the large pan and the lamp be provided with an additional in- 
ducement in the way of some strong smelling sweets, the moth thus 
arrested in its flight and its attention diverted from its evening work, 
if not falling into the pan, may be attracted a second time and be cap- 
tured. 
Unless it is found that the earlier broods are more easily attracted to 
lights it is questionable whether the inefficient lights so commonly used 
