Comprehensive Description

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General Description

Males have white faces and a single yellow dorsal dot on the 7th segment of the abdomen. The immature has a yellow marking on the thorax. The female has yellow markings on the abdomen with the same prominent, square dorsal spot on the 7th segment, which is often truncated into a trapezoid. The body varies from 1.1 to 1.3 inches in length. Larvae possess conspicuous epi-cranial protuberances on the frons or vertex.

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© University of Alberta Museums

Source: University of Alberta Museums

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