Interesting behaviour

Really interesting this, here you can see the Lasius Niger queen who has not had any food for just over a month. A cut up cricket leg was put into the test tube for her and her new born to eat as she will now start getting fed and become nothing more than an egg laying machine. As you can see, she has bent her abdomen right underneath her. This is behavior I would expect from a species such as Manica Rubida or Myrmica rubra as they have stingers. Even ants from the Formica family do this to spray formic acid at attackers. As far as I'm aware, Lasius Niger have neither stings or acid spraying capabilities. I wonder if this is some evolutionary instinct from when this ant may have had additional defences?