|1a. Abdomen with dorsal abdominal stripe; subgenital plate with median indentation; forewing length greater than 12 mm|
|1b. Abdomen concolorous; subgenital plate an even triangle; forewing length less than 10mm.|
ReferencesBaumann,RW and Kondratieff, BC 2008 The Alloperla severa complex (Plecoptera: Chloroperlidae) of western North America. Illiesia 2008 4(6):66-75. PDF
The authors split Alloperla severa into three species A. severa, A. elevata and A. thalia. Alloperla thalia is present in Colorado so may be found in Gunnison County. Alloperla severa may not be present in Colorado so I have some revising to do on this website!
Lyon,ML and Stark,BP 1997 Alloperla (Plecoptera: Chloroperlidae) of western North America. Entomological News 108 5, 321-334.
Good LinksKey to Male Alloperla