Updated 28 March 2005
| 1a. Eyes small and set far forward on head; margin of head behind eye forms a right angle; body very elongate. |
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| 1b. Eyes large, set farther back; margins of head rounded; body less elongate. |
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| 2a. Lacinia of maxilla terminating in a large single tooth; pronotal setae sparsely clustered or single and restricted to corners; numerous intrasegmental hairs on cerci. |
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| 2b. Lacinia of maxilla terminating in a single large and a single small tooth; marginal hairs of pronotum numerous at least on anterior and posterior margins; intrasegmental hairs absent from cerci. |
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| 3a. Thick, depressed black hairs laterally on sides of all thoracic sterna. Obvious darkly "hairy chest" |
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| 3b. Thoracic hairs erect and light colored. | |
| 4a. Marginal hair fringe of pronotum sparse or absent laterally, not uniform; short hair fringe on posterior margins of abdominal terga not regular or uniform; long fine hairs of cerci shorter than cercal segments; abdomen concolorous or with pale longitudinal median stripe.
There are no keys to nymphs yet. |
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| 4b. Marginal hair fringe of pronotum thick, regular, uniform, nearly complete or sparse only on lateral margins; short hair fringe on posterior margins of abdominal terga uniform and thick; long fine hairs of cerci longer than cercal segments; abdomen nearly all one color or with pale checkered pattern. | |
| 5a. Abdomen distinctly striped; pronotal hair fringe regular and nearly complete; inner margins of wingpads widely oblique. Triznaka |
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| 5b. Abdomen concolorous; pronotal hair fringe sparse laterally; inner margins of wingpads slightly oblique. |  |