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• Aquatic Macros

1.         Metaternum with 2 setae; case sometimes dorsoventrally depressed. . .Nectopsyche parvida

            Metasternum with more than 2 setae; case tubular, not flattened. . . . . . . . . . . . . . . . . . . . .2

2.         Head with longitudinal black stripes anong frontoclypeal suture. . . . . . . . . . . . . . . . . . . . . . 3

           Head lacking longitudinal black stripes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3.         Head with longitudinal black stripe extending well beyond posterior border of frontoclypeus;             pronotum with longitudinal black stripe on either side of medial fracture line; metathoracic legs             with well-developed swimming hairs. . . . . . . . . . . . . . . . . . . . . . . . . Nectopsyche diarina

            Head with longitudinal black stripe not extending beyond posterior edge of frontoclypeus;                                     pronotum lacking longitudinal stripes; netathoracic legs lacking well-                        developed swimming hairs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Nectopsyche albida

4.         Legs dark or with dark pigmentation at joints . . . . . . . . . . . . . . . . .Nectopsyche exquisita

            Legs pale brown or light yellow, no dark pigmentaton at joints . . . . .Nectopsyche candida