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A NEW HEPTAGENIA FROM THE YELLOWSTONE REGION (EPHEMEROPTERA)*
Published online by Cambridge University Press: 31 May 2012
Extract
♂ Head dark olive-brown, tinged with paler ochreous around the base of the antennae and behind the ocelli ; thorax deep black-brown, the pleural sutures marked with ochreous; abdomen dorsally light clay-color with deep brown semi-rectangular lateral patches, extending forward and downward from the posterior margin of each segment but not attaining the anterior margin except on segments one and two where they occupy nearly the entire segment; ventrally similar in color to dorsum with lateral longitudinal brown streaks or bands adjoining the suture; forceps and setae dull smoky.
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- Copyright © Entomological Society of Canada 1927
References
* —Contribution from the Division of Systematic Entomology, Entomological Branch, Dept. of Agric., Ottawa.
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