There are many such hard shelled insects, mostly beetles.
bedbugs
an abdement bug
The word pesky means annoying. A lot of insects annoy people, but two at the top of the list are flies and mosquitoes.
a rolie polie if it was black
What exactly do you mean by "hard shelled?"
A hard shelled sea creature is the barnacle.
Red spider mite
Platypus eggs are not hard-shelled, like birds' eggs. They are soft-shelled and leathery.
A beetle is a small round bug with a hard shell. There are several beetles that are black spotted. One example of a black spotted beetle is a lady bug.
no
bugs
Black beetles can be a pest in a persons house or garden. To get rid of them, a person can use many insect repellants, and killers that can bought at stores.