Combine sugar and syrup in 3 quart sauce pan.

Cook over moderate heat, stirring constantly, until mixture bubbles.

Remove from heat.

Stir in peanut butter, mix well.

Add rice krispies, stir until well-blended.

Press mixture into greased cookie sheet.

Melt chips together over hot but not boiling, stirring until well blended.

Remove from heat and spread over bars.

Cool until firm and cut into bars.