Summary and Discussion 209 
the females could be placed on the roof of a very high office 
building and the males liberated on the street immediately below. 
Rhythmic periodicity in relation to sleep, hypnosis, catalepsy, 
lethargy and wakefulness. 
Differences of odors given off by the sexes of each species. 
Homing flights in brisk, cool winds of early spring, and in 
the warm breezes of summer. 
The function of the eyes. Their eyes shine with cat-like bril- 
lianey at night, but since they need not eyes for either food or 
mating, what can be their use besides perception of light? 
If the rhythmic periodicity in certain species is fixed and 
cannot be changed by experimentation, does this set rhythm 
vary in different strains of the same species (i. e., material from 
different localities) ? 
Effect of temperature on the action of the odor glands, i. e., 
does an increase of the temperature of the wind passing over a 
female increase the emanations? 
Experiments in progressive liberation ; liberate various lots of 
moths in a favorable wind, at intervals of an hour, and at various 
distances, and then time the returns. A concrete example would 
be to liberate many male prometheas at 2:30, 3:30, 4:30, and 
5:30 p. m., at distances of 2, 114, 1 and 14 mile respectively. 
Experiments in response to moving lights in contrast to sta- 
tionary lights. é 
Rule out light completely, and see if odor plus wind excite 
response. 
Reaction of males to odor of females of other species. 
DISCUSSION OF SENSES 
The five senses possessed by Man may also reasonably be at- 
tributed to most of the insects. In the Saturniids, however, the 
sense of taste is eliminated, since they take no food. This leaves 
only four senses of which we have positive knowledge: hearing, 
seeing, touching and smelling, for the guidance of the males of 
these moths when they fare forth in their quest of mates. We 
have seen that the males travel distances up to three miles to 
reach the females. They set out when light conditions reach 
the intensity at which their species is aroused to activity. I have 
no reason to believe other than that this light perception is re- 
