90a
(89a).    Mesonotal suture (= dorsal
sclerite of mesothorax) transverse, not V-shaped..……............... 91 
 
 
90b.    Mesonotum with an entire V-shaped suture; females with long
sclerotized ovipositor 
 (Figs.A-C) (larvae are
predators of aquatic or semiaquatic arthropods)
..............................................................................................……...............................(Diptera)  Tipulidae
 
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             A                                    B                                                              C
 
                                              D                                                                                        E