FALL NUMBER 85 
PSYCHOLOGY: BEHAVIOR, INSTINCTS 
This title is quite self explanatory as to its subject matter. 
The habits and instincts of insects are varied and have been 
extensively studied. This is especially true for ants, bees and 
wasps. ; 
The definition of psychology is science of mind, and it may be 
questioned whether insects have mind, as this term is ordinarily 
used. The writer, nevertheless, prefers to retain the term, psy- 
chology, as it is difficult to believe that there should not be some 
form of mind involved in all the manifold activities of insects. 
PALEONTOLOGY 
The study of the remains (fossils) of living things found in 
the different layers of rock and earth forming the earth’s crust 
is called paleontology. The fossil insects found indicate profound 
changes in the insect life of this earth during its successive 
geological periods. Of unusual interest are the insects found 
embedded in the fossilized accumulations of resin known as 
amber. Paleontology shows that insects as a whole are, geolog- 
ically speaking, a recent group. Their soft, or at best chitinized 
bodies do not readily form fossils and so it happens that, as 
compared with animals having bony and calcareous parts, their 
past is poorly preserved. 
ECONOMIC ENTOMOLOGY 
MEDICAL ENTOMOLOGY 
These two sciences were not included in the preceding list 
because they deal directly with the practical application of ento- 
mological knowledge to human affairs. They draw largely for 
their information upon the phases of entomological science pre- 
viously noted, altho each has its own problems to solve and in- 
vestigations to make, and each is just as scientific as the other. 
The former, however, are regarded as in the realm of pure 
science, in which the practical application of the results is not 
necessarily considered, whereas the latter (the subjects of this 
topic) are in the realm of applied science, where the practical 
application of results obtained is the primary object. 
STRATEGUS WANTED—Am making a special study of this genus, 
of the Scarabeidae, and should be very glad to receive Florida 
specimens, especially of the rarer species. Will exchange or pay 
cash. Address W. Knaus, McPherson, Kansas. 
