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