  We rigorously derive pressureless Euler-type equations with nonlocal
dissipative terms in velocity and aggregation equations with nonlocal velocity
fields from Newton-type particle descriptions of swarming models with alignment
interactions. We crucially make use of a discrete version of a modulated
kinetic energy together with the bounded Lipschitz distance for measures in
order to control terms in its time derivative due to the nonlocal interactions.
