53a (52a).    Antennae long, with many segments; abdomen with at least 9
segments and with
stylelike appendages on ventral side of some segments;
without a forked appendage near 
end of abdomen, but with well developed cerci (Figs.A-C) ..........................…........…........Diplura
 
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                                                    A                              
B                                C
 
 
53b.    Antennae short, with 6 or less segments;
abdomen with 6 or less segments and usually with 
           a forked appendage near posterior
end (Figs.A-G) [springtails] ………………........….…Collembola
 
 
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                           A                                                             B                                                     C
 
                                        D                            E                              F                             G