| 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 convex; body less elongate. |
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| 2a. Epiproct large, its tip variously sculptured and hinged; brush of setae on posterolateral margins of terminal segments. |  |
| 2b. Epiproct small, about as wide as long; tip tab-like or button-like, not hinged; no brushes on terminal segments. |   |
| 3a. Darker pigmented with various pronounced brown or black markings on head or pronotum, dark abdominal stripe; sutures darkly marked; transverse ridge present on tergum nine; epiproct tip usually extending anteriorly beyond tergum ten.
Sweltsa |
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| 3b. Paler-pigmented with pale dusky or no markings on pronotum; Dark marking on head; sutures not darkly marked; transverse ridge absent on tergum nine; epiproct tip usually not extending anteriorly beyond tergum nine |  |
| 4a. Fingerlike process at base of cerci; epiproct tip button-like. |
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| 4b. No process at base of cerci; epiproct tip tab-like |
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| 5a. Aedeagus terminating in a pair of thin, feathery processes; hammer absent; body pale and unpatterned. |
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| 5b. Aedeagus lacking thin feathery processes; hammer present; body darkly patterned. Triznaka |
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