error CS1526 in Unity3D

I am creating my first Unity3D app, where in i need to create a list of column and attach events to it. But on the first step itself when i am declaring the collision events, it is giving error as:

Unity 3d error CS1526: A new expression requires an argument list or (), [], or {} after type

The line which is giving error is

List<ParticleCollisionEvent> colEvents = new List<ParticleCollisionEvent>;

Can anybody help me in this ?