Key to species of Jamaha (based on male terminalia)

1. Male pygofer in lateral view bearing a large spatulate process dorsad of the elongate process on the lateral margin of the pygofer opening (Fig. 5); anal tube greatly expanded at apex......................................................... 2

–. Male pygofer in lateral view bearing only an elongate process on the lateral margin of the pygofer opening; anal tube in lateral view bearing a large ventral tooth, but not particularly expanded apically..................................... J. chrysops

2. Large dorsal spatulate process of the lateral margin of the pale pygofer constricted near the base (Fig. 5); anal tube apically truncate; dorsolateral phallobase lobes 4-branched on the left side, 3 branched on the right (Fig. 6)............... J. playa sp. nov.

–. Large dorsal spatulate process of the lateral margin of the pale pygofer not constricted near the base; anal tube apically concave (Fennah 1955, fig. 2q); dorsolateral phallobase lobes 2-branched on the left side, 3 branched on the right (Fennah 1955, Figs 2r, 2s)....................................................................................... J. elevans