194 Trans. Acad. Sci. of St. Louts 
and among those accomplishing this early flight 73 per cent were 
thus modifie 
These 22 fenton moths were put in a cage until I could 
return to them. At 7:30 I opened this cage and stationed myself 
to observe the conduct of the entire group during their busy 
hour. Within 15 minutes, 10 of them had succeeded in making 
their way to the window; at 7:52, when the last gleams of day- 
light were leaving the sky, 21 moths were fluttering about the 
window. During the next 3 minutes, 9 more joined them, At 
about this rate, more and more of them joined in the migration, 
until about 9 o’clock, when the excitement began to wane. At 
that time 66 were there, or about one-half of the population. 
The moon did not rise until 10:30. A census at 11 p. m. gave the 
following data: 
TABLE No. 6. 
No. in No. that Per 
Exp. Responded Cent 
Normal females 1 4 28 
a ales 2 22 96 
Females, right antenna off, 7 days..... 0 0 
Females, right ant off, 4 rtdels 0 4 
Females, left antenna off, 2 days...... 5 100 
Females, left antenna off, 4 days....... 3 100 
Females, all antenne off, 2 days........ 1 5 50 
Females, all antennz off, 4 days....... : 0 4 
Females, % h antenne off, 7 days 5 100 
Females, 4% both antennz off, 4 days 3 100 
Females, 4% th. antenne off, 2 days 4 2 100 
Males, blin 5 71 
Males, blind, 2 reed 13 8 61 
les, blind, 3 days 2 28 
Females, blind, 3 days 13 1 4 
Females, blind, ? days rT 1 7 
Summary of Table: 
Normal moths 37 26 70 
All moths, right antenna off........... 9 0 ® 
Females, left antenn: off, all ages 8 8 100 
Females, all antenne off, all ages...... 4 5 36 
Females, % both ante enne off, all ages 10 10 100 
Males, blind, all a 27 15 . 
emaies, blind, an 4 ages 28 2 uJ 
The summary of the data gives some highly interesting evi- 
dence. Of course the numbers are too small to be accorded much 
serious consideration, but nevertheless they are very interesting 
indicators. It appears at first as an unusual case of accident or 
chance that all moths with the right antenna off failed to come 
the window, while all moths of all ages with the left one am- 
putated, succeeded. However, these results conform nicely to 
the results of Loeb’s experiments with certain insects with anten- 
