57a
(56a).    Mouthparts prolonged ventrally
into a snout-like process (Fig.A); body somewhat 
cylindrical
and usually <15 mm long (Fig.A) [wingless
scorpionflies].......…............... Mecoptera
 
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                                                                     A
 
57b.    Mouthparts not as previously described;
body shape and size variable..............…....................... 58