The Underground Man's reference to insects comments on both the vulnerability and submissiveness that accompanies what we'd consider a "typical" human being. Drones in particular are usually observed to be superfluous insects, submitting themselves to the will of a higher power (the queen). The Underground Man is drawing parallels between insects and what he would consider weak and fallacious human beings. One may interpret this as typical symptoms of a nihilist, or more realistically commentary from Dostoevsky pertaining to societal flaws.