bugs have a multisegmented beak through which they can
suck plant juices or, in the case of predaceous true bugs,
inject digestive enzymes into prey and then suck the body
fluids from the prey. The number of segments in the beak
can be a characteristic of the family to which the bug
belongs. As can be seen, the antenna arise from the head.Because
of their long, rigid snout, weevils are sometimes mistaken
for true bugs. The long snout does resemble the beak of
a true bug but a weevil's snout is continuous and unsegmented.
The antenna on a weevil arises from the snout rather than
from the head like true bugs.
Now you should be able to distinguish between true bugs
and beetles and weevils and, with these key characteristics,
you should also be able to distinguish true bugs, beetles,
and weevils from all other insect orders.