Electronic field guide to AQUATIC MACROINVERTEBRATES of SMALL STREAMS in Eastern Massachusetts

Body very large, widest towards rear end; large grasping (raptorial) front legs.NEPIDAE.

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Nepa

Body very long and thin, reaching several centimeters in length; large grasping (raptorial) front legs.NEPIDAE

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Ranatra
Body small, usually less than 4mm in length; tarsal claws attached AT tip of "foot"; outermost (tarsal) part of leg has 3 segments; winged.MESOVELIIDAE

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Mesovelia

Body small, less than 3mm in length; tarsal claws attached BEFORE tip of "foot"; outermost (tarsal) part of leg has only 2 segments; wingless.VELIIDAE

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Microvelia
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