Ticks and flees suck blood without having wings.
tick
Bedbug
You might be thinking of a "leech"; although that isn't an insect.
Stinkbugs are a common nuisance in homes during the summer. They are tiny brown bugs that have brown wings as well.
If you know what pigs are, and what lice are, this particular insult should be fairly straightforward. If you don't, pigs are swine, which are often considered ceremonially (and physically) unclean, and lice are small bloodsucking insect parasites.
a lech
You might try application of loose tobacco or baking soda to the sting. The cow ant (aka cow killer or velvet ant) is actually not an ant, but a wingless wasp, and insect sting swabs which are now available in some first aid kits might be effective.
GRASSHOPPER
There are many different kinds of tiny wingless insects. One of these tiny wingless insect is know as the ant.
louse
A gnat.
tick
No, a silverfish is a wingless insect.
Mosquitoes
Assassin Bug
he immature, wingless, feeding stage of an insect that undergoes complete metamorphosis.
bloodsucking insect beginning with l and has 5 letters?
You might be thinking of a "leech"; although that isn't an insect.
It's called a silverfish.