Electronic field guide to AQUATIC MACROINVERTEBRATES of SMALL STREAMS in Eastern Massachusetts
Body often large, reaching more than 4 centimeters in length; abdomen ending in six anal lobes, which may appear branched and irregular...
Tipula
Body fairly small, no more than 1.5 centimeters in length; abdomen ending in 5 short anal lobes, each with a divided black plate on the inner surface...
Molophilus
Body fairly small, no more than 1.5 centimeters in length; abdomen ending in 5 hairy anal lobes, with a tuft of long reddish hairs...
Hexatoma
6 short, hairless anal lobes, all roughly equal in size; gills much longer than lobes, finger-like; no welts or prolegs...
Limnophila
Body covered with fine wooly hair; abdomen ending in 5 hairy anal lobes of different sizes; creeping welts on underside..
Helius
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