WRAPUP 4-Honduras rivals meet mediator in coup crisis talks

(For a TAKE A LOOK on Honduras, click [ID:nN28343997])

* Mediator Arias meets Honduras rivals separately

* OAS chief says Zelaya reinstatement is key to success

* Arias blames military spending for Honduras coup (Updates with Arias meeting Zelaya, Micheletti separately)

By Patrick Markey and Ana Isabel Martinez

SAN JOSE, Costa Rica, July 9 (Reuters) - Costa Rica's president held mediation talks on Thursday with the rivals for power in Honduras as international pressure grew for the return of ousted President Manuel Zelaya after last month's coup.

President Oscar Arias held separate meetings at his residence first with Zelaya, and then with Roberto Micheletti, the interim president installed by Honduras' Congress after the June 28 coup.

Costa Rican officials said Arias hoped to bring the two together later for their first face-to-face meeting since Zelaya's overthrow, which stoked tensions in Central America and posed a diplomatic test for U.S. President Barack Obama.

Arias won the 1987 Nobel Peace Prize for helping to solve Cold War conflicts in Central America.