Hi Steve:
They are beautiful frogs. I did find a description of these frogs in my Malawi frog field guide, it might help you in positively identifying your frogs:
"Color golden or brown; a broad light band, heavily outlined in black, bordering the upper margin of snout,often continuing over and behind eyes and along dorsolateral position. Behind eyes, line may be broken into spots. Black dots sometimes present on back and legs; heel often with light spot, but no light spots on outer surfaces of legs. Length 1.75 inches (43 mm)".
Evidently there is a great variation in color and patterns in this species. Females are larger.Males have a distinct yellow gular disc over the vocal sac. Length of disc is two-thirds its width and the margins are dotted with fine black pigment cells. Hope this helps!