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1.         Posterior spiracles present on dorsolateral lobes; abdominal segments 1-7 each with a
            group of setae on either side; last thoracic segment with brushy protuberances. . . . .
            . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Oreogeton sp.

            Posterior spiracles absent; abdominal segments without setae laterally; last thoracic
            segment without brushy protuberance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

2.         Seven pairs of abdominal prolegs. . . . . . . . . . . . . . . . . . . . . . Hemerodromiinae, 3

            Eight pairs of abdominal prolegs. . . . . . . . .. . . . . . . . . . Clinocerinae, Clinocera sp.

3.         Anal division ending in a pair of prominent, divided lobes dorsally; anal prolegs ca 2x
            longer than preceding 6 pairs. . . . . . . . . . . . . . . . . . . . . . . . . . Hemerodromia sp.

            Anal division lacking divided lobes dorsally; anal prolegs approx. equal in length to
            preceding 4 pairs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Neoplasta sp.

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Key to Empididae Nymph Genera

From Courtney & Merritt, 2008