646 The American Naturalist. [August, 
Faivre very much bettered, demonstrate that a hexapod may 
live for months without a brain, if the subeesophageal ganglion, 
or better, ventro-cerebron, is left intact, just as a vertebrate 
may live without its cerebrum. Faivre long ago showed that 
this ventro-cerebron is the seat of the power of co-ordination of 
the muscular movements of the body. Binet has shown that the 
brain is the seat of the power directing these movements. A de- 
brainedhexapod will eat when food is placed beneath its palpi, 
but it cannot go to its food even though the latter be but a very 
small space removed from its course or position. Whether the 
insect would be able to do so if the mushroom bodies only 
were destroyed, and the antennal lobes, optic lobes, and the rest 
of the brain were left intact,is a question that yet remains to be 
answered. In Binet’s experiments neither olfactory nor visual 
stimuli can be transformed into motor impulses. Were it 
possible for them to be so transformed, my studies to be noted 
in a moment cause me to think that Binet’s results would be 
very materially altered. 
Now, as tomy studies. During the winter just past with no 
little patience I endeavored to apply the bichromate of silver 
method to a study of the brain aud general nervous system of 
the common honey bee, the more detailed result of a portion 
of which will be published a little later. The endeavor was 
rewarded by a considerable degree of success, the main facts 
being determined, though there are many details left for future 
studies. Others have tried to employ the same general method, 
but owing toa lack of proper store of patience or to their setting 
about the task wrongly have failed. Among them must be 
counted Binet (94), with whom, however, there seems to be a 
defect in the conception of both the Golgi and the Erlich 
methods. For he sets the former aside as inconstant, uses the 
latter, without, however, apparently obtaining any very good 
results. He complains that preparations by the Erlich method 
(and the Golgi method might be included) leave out many 
details, and never seems to think that a sufficient number of pre- 
parations willsupply those details and thus allow the whole to 
be determined. This is the more unfortunate, since his de- 
pendence upon the old methods has led him to give detailed 
