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Males

1.         Vesicle present on sternum 9  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2

            Vesicle absent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4

2.         Vesicle length less than 2.75 times its greatest width; sternum 9 apical hairs directed down and forward, shorter than the more anterior hairs . . . . . . . . . . . . . . . . . . . . . . . . . Taeniopteryx nivalis

            Vesicle length 3-5 times its greatest width; sternum 9 apical hairs directed backward and as long or longer than the more anterior ones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   3

3.          Hind femora with a spur projecting a distance at least half as much as the width of the femur; posteromedial arms of paraprocts narrowly triangular with acute apices . . . . . . . . . . . . . . . . T. maura

            Hind femora without a spur, or with a callus or low spur projecting less than half the width of the femur; posteromedial arms of paraprocts fingerlike with nearly parallel sides and subtruncate apices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T. burksi

4.         Posterior projection of paraprocts with acute, outward-hooked tips  . . . . . . . . . T. parvula

            Posterior projection of paraprocts with rounded, unhooked tips . . . . . . . . . . . . . . . . . . . . . . 5

5.         Posterior projection of paraprocts arising near the middle of a broad basal plate, ingerlike, and curved slightly outward . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .T. metequi

            Posterior projection of paraprocts continuous medially with its basal plate . . . . . . . . . . . T. lita

Females

1.         Genital notch of sternum 8 margined by a shallow or deep U-shaped line of sclerotization  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Taeniopteryx lita

2.         Genital notch margined by a V-shaped line of sclerotization . . . . . . . . . . . . . . . . . . . . . . . . . 3

3.         Middle half of sternum 8 little sclerotized, light in color; the subgenital plate a dark V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Taeniopteryx parvula

            Middle half of sternum 8 normally schlertoized often lighter anteromedially. . . . . . . . . . . . . . .4

4.         A tongue-like, lightly sclerotized plate in the genital notch . . . . . . . . . . . . . . . . . . . . . . . . . . 5

            No tongue-like plate in the genital notch  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

5.         Subgenital plate with a median, nipple-like projection . . . . . . . . . . . . . . . . . . . . . . . T. burksi

             Subgenital plate apically truncate and shallowly concave. . . . . . . . . . . . . . . . . . . .T. metequi

 6.        Sclerotized shoulders of the genital notch meet anteriorly to form an acute angle  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T. nivalis

            Sclerotized shoulders of the genital notch lightly sclerotized anteriorly, not appearing to meet at an angle  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T. maura

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