These bugs have suddenly appeared in my house. They sit on the roof of my apartment and don't seem to move much. The smaller bug has been in the apartment for a few weeks and I have tried to fumigate them but they refuse to die. They have infested the whole house. The small ones are all over the furniture and walls and floor. They run when I blow air on them. Please please tell me what these bugs are.. I have had to vacate the place and an staying In a hotel because I don't know what these are and if they are dangerous or not.