On para-Sasakian manifolds with canonical paracontact connection

The object of the present paper is to study a para-Pasakian mani- fold with a canonical paracontact connection. We prove that phi-conformally flat, phi-concircularly flat and phi-projectively flat para-Sasakian manifolds with respect to canonical paracontact connection are all eta-Einstein manifolds. Also, it is shown that a quasi-concircularly flat para-Sasakian manifold is of constant scalar curva- ture.