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Stoneflies - Plecoptera: Chloroperlidae of Gunnison County, Colorado

Suwallia Male key to species

1a. Dorsal surface of epiproct margined with stiff dorsally directed hairs, center of disk is bare.
1b. Dorsal surface of epiproct covered entirely with hairs.
2a. Posterior margin of tergum 9 with median third extended posteriorly to form a tab, occasioanlly may be folded under.
2b. Posterior margin of tergum 9 straight, not forming tab.

References

Alexander,KD; Stewart,KW 1999 Revision of Genus Suwallia Ricker (Plecoptera: Chloroperlidae). Transactions of American Entomological Society 125 3, 185-250.

Good Links

Key to Female Suwallia
Brown, Wendy S. 2004 Plecoptera or Stoneflies of Gunnison County, Colorado
www.gunnisoninsects.org