22a (21b).    Tarsi with 3 segments, basal segment of front tarsi enlarged

             ………………………………………………...................……… (Figs.A-B) [webspinners].Embioptera

 

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                                       A                                    B

 

 

22b.    Tarsi with 2-3 segments, basal segment of front tarsi not enlarged...............................………......... 23