It really depends on the type of beetles. Some beetles are carnivorous, while others are herbivorous or omnivorous. The types of adaptations they have for getting their food will depend greatly on the type of food they typically eat. So, you probably have to narrow your question down to a particular type of beetle.
beak
questions
water, food
they can spin webs to trap insects
kalangiskisan or firashies and with the connection of gills
for we all know mouth is the primary means fo getting food
They have flat surfaced grinding teeth.
Is a change in structure movement or characteristics in order to adjust to the environment
thats the part where they eat.
any insects they'd eat
you have learned that animals have different ways of adapting to their environment this adaptation is some times a result of the kind of food they eat.there are 6 ways to get their food.Beaks and ClawsBiting and SuckingMouth and TeethTentaclesPincersSticky Tongue
An adaptation is that they make their own food.