Andrews—Experiments with Larva of the Bee Moth. 259 
crawled from the light and tried to find a dark hiding place. This 
was true in the case of stimuli of varying intensities, although 
they are less sensitive to weaker stimuli. From the time they 
were 5 mm. long the larvae were found to be affected more and 
more by light rays. When taken out of the comb, placed on the 
table, and the light of a 40-watt Mazda globe turned on them, the 
older larvae invariably crawled into some dark crevice. Sunlight 
affected them in the same manner. When comb containing lar¬ 
vae was put in the sunlight or under the 40-watt globe, the lar¬ 
vae which were on top scurried through their tunnels to the bot¬ 
tom of the comb. 
Light stimuli, both artificial and sunlight, did not affect the 
pupae at all. They always responded, however, to mechanical 
stimuli, such as jarring or the touch of a dissecting needle, by 
moving their abdomens. 
Newly emerged moths were not found to be very sensitive to 
light, but those several days old, especially females which were 
ovipositing, responded to light and would fly up from their nest¬ 
ing places in the dishes on being put into sunlight or into the 
light from an electric globe. Sunlight seemed to disturb them 
more than artificial light. 
Feeding Experiments 
Problems in the feeding of Galleria mellonella were undertaken; 
bee-bread, dead moths, dead bees, and larvae being used for food 
as well as brood comb. 
PoUen. Since it has been held that the larvae of Galleria mel¬ 
lonella eat beeswax for the pollen it contains and derive no nour¬ 
ishment from the wax itself, the question was raised as to whether 
the larvae would mature on bee-bread alone. 
In most of the brood-comb used, a great many of the cells were 
partly filled with tightly packed bee-bread, the lumps of which 
were removed from the cells, and placed in Petri dishes with sev¬ 
eral larvae a day or two old; the dishes were placed in the incu¬ 
bator at 37 °C. All these larvae died. Then the effect of mash¬ 
ing up the bee-bread was tried, and other young larvae were put 
in the dish with the same result as before. Finally it was dis¬ 
covered that part of the bee-bread was stale; after that it was cut 
into slices and only the freshest portion was used. Upon the bee- 
bread prepared in this manner, three larvae out of the hundred 
and one used in the experiment were raised. They acted nor- 
