177a (176a).    Head almost completely covered by prothorax; many species with illuminescent

                       organs (Figs.A-B) (predators of snails)................................................(Coleoptera)  Lampyridae

 

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                            A                                  B

 

 

177b.    Head not at all covered by prothorax; no light producing organs (Figs.A-C) (general

            predators)..............................................................................…….....................(Coleoptera)  Cantharidae

 

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                             A                             B                                 C

 

 

177c.    Head not covered by prothorax, adult females often wingless & luminescent (Figs.A-B)

            (glow worms; larvae predaceous on other arthropods).....……..............(Coleoptera)  Phenogodidae

 

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                            A                                     B