As always, there should be a 100 nF directly across Vcc and ground of each chip. Depending on your PCB design, this could be at one end of the MAX7219 with the two connections to Vcc and ground pins running underneath the chip or the capacitor itself may even be directly under the chip if it is a DIP (especially if socketed). It could be on the underside of the double-sided PCB.
The 10 (or 22) µF (page 10) capacitor may reasonably be shared between two ICs.