Lice -LRB- singular : louse -RRB- , -LRB- order Phthiraptera -RRB- , also known as fly babies or Nits , are an order of over NUMBER@1 species of wingless insects ; three of which are classified as human disease agents .

Lice -LRB- singular : louse -RRB- , -LRB- order Phthiraptera -RRB- are an order of wingless insects . There are more than NUMBER@1 different species ; three are classified as human disease agents .
